An example where reaction time wouldn’t matter very much for the results
When studying the properties of light, for example, reaction time would not matter much. Light moves at such a fast rate that reaction time has no effect on the results of experiments measuring the speed of light, the reflection of light, or any other property related to light.
What is reflection?
Reflection is when a wave, such as a light wave or sound wave, bounces off a surface and returns to the source. This happens when the wave encounters an obstacle such as a wall or other barrier, and the wave is redirected back towards the source. Reflection is one of the fundamental principles of physics, and is used to explain many phenomena such as the fact that light is reflected off of a mirror. Reflection is also used to help explain phenomena such as sound reverberation and the formation of shadows.
What is sound reverberation ?
Sound reverberation is the effect created when a sound is reflected off of surfaces in a room or area. This effect is created when the sound bounces off of walls, ceilings, and other objects, and then is heard again by the listener. This creates an echo-like effect, and can be used to create a more acoustically ‘live’ sound.
Therefore, One example of where reaction time wouldn't matter very much for the results is when studying the properties of light.
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An absorption spectrum is:
a) various wavelengths emitted by an excited substance
b) a spectrum containing all wavelengths
c) the range of wavelengths emitted or absorbed by an object
d) the wavelengths that are removed from a continuous spectrum when it passes through a substance
e) a spectrum that contains only a few discrete wavelengths
What dielectric material, if any, in the table is your best choice for all three applications?
1) polycarbonate
2) polyester
3) polypropylene
4) polystyrene
5) pyrex
6) No single material is best for all three categories
No single material is best for all three categories. Each application may require a different dielectric material depending on performance requirements.
What is Dielectric material ?
A dielectric material is a non-conductive material that is used to provide electrical insulation between two conductors. It is also used to store electrical energy in the form of an electric field. Common dielectrics include plastic, glass, rubber, and oil. Dielectric materials are also used in capacitors, which are devices that store electrical energy in the form of an electric field. The dielectric material between the capacitor plates controls the electric field strength, allowing the capacitor to store more energy. Dielectric materials also have high dielectric constants, which allow them to store more energy in a given volume
What does Capacitors means?
Capacitors are electronic components that store electric charge. They have two terminals and act as a short-term energy storage device. They are used in a wide variety of applications such as filtering, energy storage, timing, and signal processing. In a circuit, capacitors are connected in series or parallel to increase the capacitance. This increases the ability of the capacitor to store electrical energy. When a voltage is applied to the capacitor, it accumulates electric charge. This charge can then be released when needed.
Therefore the correct option is 6. No single material is best for all three categories
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This force exerted on you by the is also A. your mas b your wieght c. half you mass d. half your weigth
This force exerted on you by the earth is also your weight, option B.
What force is the earth's pull on the body?The gravitational pull of the Earth on a body is referred to as the body's weight. Also, weight is the gravitational force between the earth and an object. It is also equal to the product of gravity's acceleration and the object's mass.
The force you exert on the earth in free fall is equal to your weight. The third law of Newton. Forces that are equal and opposite. With your weight, the Earth pulls on you. In other words, an object's weight is determined by the pull of gravity on it.
The complete question is:
This force exerted on you by the earth is also
A. your mass
B. your weight
C. half you mass
D. half your weight
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The electric flux through each of the six sides of a rectangular box are as follows:
F1 = +216.0 N · m2/C
F2 = +243.0 N · m2/C
F3 = -346.0 N · m2/C
F4 = +175.0 N · m2/C
F5 = -100 N · m2/C
F6 = +450.0 N · m2/C
How much charge is in this box?________C
The total charge on rectangular box is 5579.2 × 10 ⁻¹³ C.
What are electric flux and its measure?Although an electric field cannot flow by itself, electric flux in electromagnetism is a measure of the electric field passing through a certain surface. Any place in space where there is an electric charge will be affected by the electric field E. The gradient of the potential is the electric field. The distribution of the electric field or the velocity at which the electric field moves through a specific area can both be measured as electric flux. The Greek letter e is used to represent electric flow. Electric flux is measured in SI units as or Nm 2 C – 1.
Total charge = Φ.ε₀
Total flux = 634 N · m2/C .
Total charge = 634 N · m2/C . 8.8 × 10 ⁻¹³
Total charge = 5579.2 × 10 ⁻¹³ C
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A car drives 215 KM East, and then 45 KM North what is the magnitude of the crisis appointments round your answer to the nearest
whole number?
So, the magnitude of the crisis appointments to the nearest whole number is 220 km.
Introduction and Formula UsedHi! Here I will help you to discuss the displacement of a movement. Unlike distance which is a scalar quantity, displacement is a vector quantity. Then, we can define the distance as the shortest distance from two points of two or more movements. In this case, the car's motion is from east to north. Remember that the angle formed between east and north is mutually perpendicular (90°). So, we can calculate the magnitude of the displacement that occurs in two mutually perpendicular movements with this equation:
[tex] \boxed{\sf{\bold{s = \sqrt{(x_1)^2 + (x_2)^2}}}} [/tex]
With the following condition:
s = the displacment[tex] \sf{x_1}[/tex] = the distance of first movement[tex] \sf{x_2}[/tex] = the distance of second movementProblem SolvingWe know that:[tex] \sf{x_1}[/tex] = the distance after first movement = 215 km to the east.[tex] \sf{x_2}[/tex] = the distance after second movement = 45 km to the north.What was asked:s = the displacment or crisis appointment = ... kmStep by step:[tex] \sf{s = \sqrt{(x_1)^2 + (x_2)^2}} [/tex]
[tex] \sf{s = \sqrt{(245)^2 + (45)^2}} [/tex]
[tex] \sf{s = \sqrt{46,225 + 2,025}} [/tex]
[tex] \sf{s = \sqrt{48.250}} [/tex]
[tex] \sf{\bold{s \approx 219,66 \: km}} [/tex]
ConclusionSo, the magnitude of the crisis appointments to the nearest whole number is 220 km.
the higher the principal quantum number (n), the lower the orbital energy.
A. True
B. False
The statement is false
Does a higher quantum number imply more energy?The stronger the electron’s energy, the higher the primary quantum number. As a result, the electron’s energy level is determined by the primary quantum number. The form of the electron wave is determined by the azimuthal quantum number, l. The electron sublevels are also known as l values.
The energy level of an electron in an atom is represented by the primary quantum number. It is responsible for determining the size and energy of an atomic orbital. The greater the value of the primary quantum number, the larger the size of the atomic orbital and the higher the energy level. When the value of the primary quantum number rises, the difference in energy falls.
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A 0.0300-kg bullet is fired vertically at 200.0 m/s into a 0.159-kg baseball that is initially at rest. The bullet lodges in the baseball and, after the collision, the baseball/bullet rise to a height of 37.0 m. Assume up to be the positive direction. What was the average force of air resistance while the baseball/bullet was rising? If the force is upward, enter a positive answer and if the force is downward, enter a negative answer.
The average force of air resistance while the baseball/bullet was F=-0.94N
Given:
mbullet=0.030 kg
vbullet=200m/s
mbasketball=0.15kg
To solve the velocity after collision, we will use the conversation of momentum
m₁v₁=m₂v₂
[tex]v_{2} =\frac{m_{1}v_{1} }{m_{2} }[/tex]
since the baseball is at rest before the collision, the initial momentum can be calculated purely from the bullet
m₁=mbullet=0.030kg.
v₁=vbullet=200m/s
However, since the bullet lodges to the baseball after the collision, the mass after the collision should be
m₂=mbullet+mbaseball
m₂=0.030kg+0.15kg
m₂=0.18kg
plugging in the values to the equation of v₂
v₂=(0.030)(200)/0.18
v₂=33m/s
To calculate the average force air resistance, we must first determine the work done by the air on the bullet and baseball
-Wair=Wbullet+baseball-Wgravity
Since work done by the bullet and baseball is purely kinetic energy, it can be expressed as
[tex]Wbullet+baseball=\frac{1}{2}mv^2[/tex]
On the other hand, the work done by gravity is purely potential thus
Wgravity=mgh
we can now express the work done on the air as follows
[tex]Wair=\frac{1}{2} mv^2+mgh[/tex]
plugging the given values
[tex]Wair=\frac{1}{2} (0.18)(33.333)^2+(0.18)(9.8)(37)[/tex]
Wair=-34.73J
We will now use the work equation to calculate the average force of air resistance:
W=Fd
[tex]F=\frac{W}{d} \\\\F=\frac{-34.73}{37}[/tex]
F=-0.97N
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PLEASE HELP ASAP! 100 Pts!
A force of 50 N acts on an object weighing 25 N for 5 seconds. Find the change in velocity of the object.
Force = 50N
Weight = Mass × Gravity = 25
Mass = 25 ÷ 10 = 2.5Kg
Time = 5 Seconds
we know
Force = mass × acceleration
50 = 2.5 × Velocity ÷ Time
50÷2.5 = Velocity ÷ 5
Velocity = 250 ÷ 2.5
Velocity = 100m/s.
Answer:
100m/s
Explanation:
force(f) = 50N
weight = 25N
weight = mass × gravity
25 = m × 10
25 = 10m
m = 25/10
m = 2.5kg
time(t) = 5sec
impulse formula
ft = m(∆v)
by substituting
50 × 5 = 2.5∆v
250 = 2.5∆v
∆v = 250/2.5
∆v = 100m/s
i hope this helped
A football is 35.0 m from a goal post. The kicker kicks the ball at 18.7 m/s at a 48.0° angle. The goal post is 3.05 m above the ground.
How many meters will the ball
be short of clearing the goal post?
(Unit = m)
The ball will be 0.16 meters short of clearing the goal post.
What is vertical and horizontal motion and explanation of an given question?To find out how many meters the ball will be short of clearing the goal post, we need to determine the trajectory of the ball and compare it to the height of the goal post. This can be done by using some basic physics equations, such as the equations of motion for horizontal and vertical motion.First, we can use the initial velocity and the angle of launch to find the horizontal and vertical components of velocity using the following equations:Vx = V0 * cos(theta)Vy = V0 * sin(theta)where V0 is the initial velocity (18.7 m/s), theta is the launch angle (48 degrees), Vx is the horizontal component of velocity, and Vy is the vertical component of velocity.Next, we can use the horizontal and vertical velocities to find the horizontal and vertical distance the ball travels using the following equations:x = Vx * ty = Vy * t - 0.5 * g * t^2Where x and y are the horizontal and vertical distance the ball travels, t is the time of flight and g is the acceleration due to gravity.We can then use the time of flight to find the horizontal and vertical distance the ball travels.Finally, we can compare the height of the goal post (3.05 m) to the vertical distance the ball travels. The difference between these two values is the distance the ball is short of clearing the goal post.After solving the above equations we get the ball is 0.16 meters short of clearing the goal post.To learn more about horizontal motion refer:
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when [s] = 20 km, what percentage (%) of vmax has been reached?
When s=20km the percentage of vmax reached is 83.33%.
As per the data given in the above question are as bellow,
The data share are as bellow,
The value of s is equal to 20km.
We have to determine the percentage of vmax reached.
We have to use the formula of rate of energy catayzed reaction.
A appropriate catalyst can be added to a reaction to accelerate its pace. A catalyst is a material that speeds up a chemical process without being consumed (remains chemically unchanged at the end). It offers a different, lower-activation-energy reaction route.
Rate of energy calculate reaction is equal to vmax upon km plus s
V=(vmax[s])/(KM+[s])
V=[tex]\frac{vmax\:5Km}{Km+5km}[/tex]
V=[tex]\frac{5vmax\:Km}{6km}[/tex]
Cancelling Km we get,
V=[tex]\frac{5}{6} vmax[/tex]
Percentage of Vmax reached [tex]\frac{\frac{5}{6}vmax }{vmax} \times 100[/tex]
83.33%
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You hold a shiny tablespoon at arm's length and look at the front side of the spoon. a) is the image you see of yourself upright or inverted? b) is the image enlarge or reduced? c) is the image real or virtual?
The image formed is inverted. From the ray diagram, the object and image are on same side of the mirror. Thus, the imaged formed is real.
What is Inverted Image?
A section of physics called optics studies how light behaves and interacts with objects. Lenses are curved, transparent structures that are often constructed of glass and are used for focussing or dispersing light.
A convex lens is the opposite of a concave lens. Light rays converge in convex lenses as opposed to concave lenses. The convex lens converges incident rays towards its central axis because, in contrast to the concave lens, it is larger in the middle and thinner at the corners.
The edges of the convex lens are curled outward rather than inward. When the light is intensely focused beyond the focal length of the lens, the image appears smaller and inverted.
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A square wire loop 13.0 cm on each side carries a clockwise current of 9.00 A Part A Find the magnitude of the magnetic field at its center due to the four 1.60 -mm wire segments at the midpoint of each side Express your answer with the appropriate units. B====
Part B Find the direction of this magnetic field. O into the page O to the left from the wire O out of the page O to the right from the wire
The explanation of part A and Part B about magnetic field is given below
What is magnetic field?A magnetic field is a force field created by a moving electric charge, such as an electron, or a group of electric charges that interact with each other. Magnetic fields can be invisible or visible, depending on the size and strength of the field. They can be created by permanent magnets, electric currents, or a moving charge in an electric circuit. Magnetic fields are invisible forces that can attract or repel objects, as well as interact with other magnetic fields. The Earth has its own magnetic field, which helps protect us from dangerous solar radiation.
Part A
The magnitude of the magnetic field at the center of the square wire loop due to the four 1.60 mm wire segments at the midpoint of each side is 5.22 x 10-3 T.
Part B
The direction of this magnetic field is out of the page.
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HELP!!!!! a 3 kg mass is moving 14.2 m/s east and collides with a 8 kg mass moving 8.2 m/s west. After the elastic collision, what is the velocity of the 8 kg mass? (east is positive and west is negative in terms of direction)
After the elastic collision, velocity of the 8 kg mass is calculated as 13.525 m/s.
What is elastic collision?A collision in which there is no net loss in kinetic energy in the system as a result of the collision is called an elastic collision. Momentum and kinetic energy are conserved quantities in elastic collisions.
m1v1i + m2v2i = m1v1f +m2v2f
m1 =3 kg ; v1i = 14.2 m/s
m2 = 8kg ; v2i= 8.2 m/s
v1f= 0
v2f = m1v1i + m2v2i / m2
= (3* 14.2) + (8 * 8.2)/8
V2f = 13.525 m/s
Velocity of the 8 kg mass is 13.525 m/s.
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If a compass is placed above a current-carrying wire, as in Figure Q24.34. the needle will line up with the field of the wire. Which of the views shows ihe correct orientation of the needle for the noted current direction?
According to the views shown B and D are the correct orientation of the needle for the noted current direction.
Does an electric field affect compasses?Normally, compasses align themselves parallel to magnetic field lines in response to the Earth's magnetic field. If we produce a magnetic field that is more powerful than the field of the Earth. For instance, a compass needle will align itself parallel to the new field by using electric current. Because a magnetic field is formed in the wire when the circuit is linked, the compass needle responds to electricity by moving.
What occurs when a compass is placed close to an electric current?In its magnetic field, a current-carrying wire acts like a magnet and has an impact on other magnets. When we set a compass close to a current-conducting wire, the needle in the compass will therefore be deflected.
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what would be the period of a satellite in a low orbit around this large, dense planet?
For the motion of a satellite around a planet: V = square (GM) / R), where G is gravity constant, M is the mass of the planet, and R is the radius of the orbit.
For the duration of a satellite around a planet: T = 2 x pi x (square (r ^ 3 / gm)), where g is gravitational constant, m is the mass of the planet, and radius of the orbit is. In both the cases, R is the distance from the planet's center, not only the height on its surface.
Thus, the orbital period in low orbit turns on only on the density of the central body, regardless of its size.
Yet, for the Earth become the central body (or any other spherically symmetric body with the same average density, about 5,515 kg/m 3.
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A block of mass m and speed v collides with a spring, compressing it a distance Δx. What is the compression of the spring if the mass of the block is halved and its speed is doubled?
√2 times is the compression of the spring if the mass of the block is halved and its speed is doubled.
What is mass?
Mass is a unit used in physics to describe inertia, a fundamental property of all matter. It essentially refers to the resistance a mass of matter provides to a change in its speed or location brought on by the application of a force. The amount of the body's mass determines how much of a change an applied force produces.
What is speed ?
A shift in an object's location, either in direction or speed. How fast something is travelling is determined by how far it has travelled in relation to how long it took. Speed is considered a scalar quantity because it only has a direction and no magnitude.
let the compression in the spring be x
kE of block becomes PE of spring
1/2 * mv^2 = 1/2 * kx^2
x = v√(m/k)
So, if mass is halved and speed is doubled, compression becomes 2*√1/2 = √2 times
Therefore, √2 times is the compression of the spring if the mass of the block is halved and its speed is doubled.
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a magnet allowed to stand freely , like a compass needle, will point to the north in response to earth's magnetic field unless it's near a strong magnet
It is true that if a magnet allowed to stand freely , like a compass needle, will point towards north in response to earth's magnetic field unless it's near a strong magnet.
Which direction will the magnet point if it can move freely in a compass?One end of any bar magnet will always point north if it is freely suspended. This is called north-seeking pole of magnet, or simply north pole and the opposite end is called south pole.
All the metals found on Earth (natural & man-made) are magnetic. Earth has huge magnetic field that extends from North & South Poles out into the space.
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With the diagram and the data answer the question:
What is the magnitude of A +B?
DATA:
theta1 =43.7o,
theta2 =144.0o,
A =4.7 cm,
B =8.5 cm.
With the diagram and the data the magnitude of A +B is 13.2 cm.
What is Magnatitude?
Magnatitude is a measure of the strength of a magnetic field. It is typically expressed in units of tesla (T), which is equivalent to one newton per ampere-meter (N/A-m).Magnatitude is a useful tool for measuring the intensity of magnetic fields in various applications, such as in medical imaging, geophysics, and astrophysics. It can also be used to measure the strength of a permanent magnet.
What is Astrophysics?
Astrophysics is a branch of astronomy that deals with the physical and chemical properties of celestial objects, including stars, planets, galaxies, and the interstellar medium. It also focuses on the study of the origin and evolution of these objects, as well as their interactions with each other and with the surrounding environment. Astrophysics is a multidisciplinary field that draws on the principles and methods of physics, mathematics, and chemistry.
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Stacey is riding in a train moving at 100 km/hr. After ten minutes, she is moving at a rate of 120 km/hr. Which statement best describes the difference between her initial velocity vector and her velocity vector after ten minutes?
the direction will be opposite
the sign will be positive
the size will be smaller
the size will be greater
Since the magnitude of the second velocity is bigger than the first, the size will be greater is the difference
What is Velocity ?Velocity can be defined as the distance covered by a body in a specific direction. Velocity is a vector quantity.
Given that Stacey is riding in a train moving at 100 km/hr. After ten minutes, she is moving at a rate of 120 km/hr.
In the two instances, we are only given the magnitude of the velocity and not the direction. We can make an assumption that they are in the same direction
The statement that best describes the difference between her initial velocity vector and her velocity vector after ten minutes is;
the size will be greater
Because the size of the second magnitude of the velocity is bigger than the size of the first the magnitude of the second velocity.
Therefore, the statement that best describes the difference between her initial velocity vector and her velocity vector after ten minutes is "the size will be greater"
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A toaster oven is rated at 1800 W for operation at 120 V, 60 Hz. Part A What is the resistance of the oven heater element?
8 ohms is the resistance of the oven heater element
What is resistance ?
Resistance is measured in ohms and represented by the Greek letter omega (Ω). Ohm is named after German physicist Georg Simon Ohm (1784-1854), who studied the relationship between voltage, current and resistance. He has been credited with formulating Ohm's law.
All substances resist the flow of electricity to some degree. They fall into one of two broad categories:
conductor: A material that offers very little resistance through which electrons can easily move. example:
silver, copper, gold, aluminium.
Insulator:
A substance that has a high resistance and restricts the flow of electrons. example:
Rubber, paper, glass, wood, plastic.
R= V^2/P = 120*120/1800 = 8 ohms
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2. what does it mean that the image is inverted when you look through the ocular lenses?
The light beams that are released through the light source and cross invert the picture that is created by the ocular lenses.
An image that depicts the topic in the opposite way is said to be inverted. In the concave mirrors, the genuine images are reversed. The concave mirror reflects the top edge of the object downward, below the principal axis. In a way similar to this, light rays from the lower edge of the mirror are reflected upward. When light is focused at a point that is farther away than the focal length of the lens, the picture is inverted and diminished. Microscopic objects are amplified and orientated in telescopes and microscopes using compound lenses, which are many lenses with a single focus point.
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Find the binding energy (in MeV) for lithium 3Li9 (atomic mass = 9.026789 u).
According to the given statement the binding energy (in MeV) for lithium 8.48 MeV.
What causes binding energy?In particle physics, the term "binding energy" describes the energy an atom receives via electromagnetic interaction as well as the quantity of energy needed to break an atom down into free nucleons.
Using the following formula, the binding energy of 3Li9 (atomic mass = 9.026789 u) may be determined:
B.E. = (Z * m_p + (A - Z) * m_n - m_Li) * c²
where:
Z = number of protons (atomic number) = 3
m_p = mass of proton (1.6726219 × 10⁻²⁷ kg)
m_n = mass of neutron (1.6749286 × 10⁻²⁷ kg)
m_Li = mass of lithium-9 atom (9.026789 × 10⁻²⁷ kg)
c = speed of light (2.998 × 10⁸ m/s)
Plugging in the known values, we get:
B.E. = (3 * 1.6726219 × 10⁻²⁷ kg + (9 - 3) * 1.6749286 × 10⁻²⁷ kg - 9.026789 × 10⁻²⁷ kg) * (2.998 × 10^8 m/s)²
This equals roughly 8.48 MeV.
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The magnitude of charge A is half the magnitude of charge B. However, the electrostatic force experienced by charge A and by charge B is the same. It can be concluded that the electric field strength of charge A is ________ the electric field strength of charge B. one-fourth one-half two times four times
Answer:
Qb = 2 Qa magnitude of charge on B is twice that of A
F = K Qa * Qb / R^2 both charges experience the same force
Ea = K Qa / s^2 field strength of A at distance S
Eb = K Qb / s^2 field strength of B at distance S
The electric field strength of B is twice that of A
That means that charge on A is 1/2 that on B for the forces on each to be the same:
Fa = Qa * Eb
Fb = Qb * Ea
The drawing shows a device that can be used to measure the speed ofa bullet. The device consists of two rotating disks,separated by a distance of d = 0.850 m, and rotating with anangular speed of 95.0 rad/sec. The bullet first passesthrough the left disk and then through the right disk. It isfound that the angular displacement between the two bullet holes isθ = 0.240 rad. From these data, determine thespeed of the bullet.
V = 336.46 m/sec is the speed of the bullet .
What is displacement ?
Displacement in mechanics. The distance a particle or object travels in a particular direction. Particles and bodies are usually treated as point masses. That is, without loss of generality, an object can be treated as if all its mass were concentrated at one mathematical point. In the figure, A is the start position of the point, B is the end position, and the straight line from A to B is the displacement. The distance a point moves depends on the path it follows. Equals the amount of displacement only if the path is straight. In mechanics, it is often necessary to distinguish between the distance a point moves (or the distance a force acts) and the displacement of a point or force. Displacement is a vector quantity because it has both magnitude and direction.
Let speed of bullet be "V". Then we have:
{Speed Of Bullet} = V
{Time For Bullet To Travel
Distance "d" Between Rotating Disks} = T =
= d/V
= (0.850 m)/V
= (0.850)/V (<---Eqn #1)
{Disk Rotational Speed} = ω = 95.0 rad/sec
{Angular Displacement Between Bullet Holes} = θ = 0.240 rad
{Time Between Successive Disk Bullet Holes} = T =
= θ/ω
= (0.240)/(95.0)
= 0.002526315 sec (<--- Eqn#2)
We now equate Eqn #1 & #2, and solve for "V":
(0.850)/V = 0.002526315
----> V = (0.850)/(0.002526315)
----> {Bullet Velocity} = V = 336.46 m/sec
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which of the following sound frequencies lie(s) in the audible range?
A. 10 Hz
B. 15 Hz
C. 30,000 Hz
D. 15,000 Hz
D. 15,000 Hz is the frequecy which lies in the audible range i.e. the range at which the sound is audible.
The audible range for humans is the range of sound frequencies that can be heard by the human ear, it varies depending on the age, sex and overall health of the individual. Generally, the range of audible frequencies for most human adults is between 20 Hz and 20,000 Hz. Frequencies below 20 Hz are considered infrasonic and cannot be heard by the human ear, while frequencies above 20,000 Hz are considered ultrasonic and also cannot be heard by the human ear. However, some people, such as young children and some animals, are able to hear a wider range of frequencies. The human ear is most sensitive to frequencies in the range of 1,000 Hz to 4,000 Hz, which is why these frequencies are often used for speech and music. The sensitivity to certain frequency ranges vary between people depending on their age and overall hearing health, for example, as people get older, they tend to lose sensitivity to higher frequencies.
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what is the q value for the reaction 9be + α → 12c + n
The Q value for the reaction 9be + α → 12c + n is 4.68 Mev. The amount of energy absorbed or released during a nuclear reaction is known as the Q value for that reaction.
It is a measurement parameter by which we can describe it is exothermic or endothermic. If Q value is -ve then endothermic if +ve then exothermic
[tex]Q_{value}=(m_{r}- m_{p})931 .5~MeV[/tex]
where
[tex]m_{p} = sum ~of ~masses~ of~ products\\\\m_{r}= sum ~of~ masses~ of ~reactants[/tex]
Mass of reactants = Mass of Be + Mass of He
=9.0121+4.0015
= 13.0136 u
Mass of products = Mass of C + Mass of H
= 12+1.0086
=13.0086 u
Q={(13.0136)-(13.0086)(931.5}
Q=4.68 MeV
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If, at a given time, the position of a subatomic particle is precisely known, then the time over which it was measured cannot be precisely known. the particle will disappear. its velocity cannot be precisely known. no other particles can have the same position.
If, at a given time, the position of a subatomic particle is precisely known its velocity cannot be precisely known.
What is a subatomic particle?
Simply put, a subatomic particle is a particle that is smaller than an atom. Protons, electrons, and neutrons are the three subatomic particles that may typically be separated from an atom.
The uncertainty principle, which was first put forth by German physicist and Nobel laureate Werner Heisenberg in 1927, states that we cannot know both the position and speed of a particle, such as a proton or electron, with absolute precision; the more precisely we can determine the particle's position, the less we know about its speed, and vice versa.
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An object with a large momentum...
is easy to change the motino of
must have a large mass
is difficult to change the motion of
must have a large velocity
is difficult to change the motion of
As we know that momentum is calculated by the multiplication of the Mass and Velocity of anybody and for getting large momentum we need any of them or both large.
Let's take the example of large velocity for large momentum. As the body has a large velocity, it is not going to be easy to change the motion of the body with a large velocity. So in this case is difficult to change the motion of the body. Just like a bullet of a gun has large momentum the motion is really hard to change even if the bullet has very less mass.
Now let's talk about a body with a large mass. As the body has a large mass will lead to a larger the momentum of body and again it will not be easy to change the motion of the body. Take an example of a large loaded truck even if it is at low speed it is now easy to change its motion, As it has a huge mass.
Now when even one out of Mass and velocity is large then the motion of the body is hard to change and if both are large then it will become harder to change it. Take an example of a freight train that has a huge mass and it is moving at more than 100 kmph then it will not be possible to handle to change its path so it most of the time moves slowly.
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1. A 1.15-kg block is released from rest on a frictionless inclined plane. The inclined plane forms an angle of 35° with the
ground. The block slides down the inclined plane and compresses a spring at the bottom by 3.5 cm and stops momentarily.
If 334 N are required to compress the spring by 2.4 cm, what distance has the block travelled?
>
Answer:
Explanation:
We can use the work-energy principle to solve this problem. The work-energy principle states that the work done on an object is equal to the change in kinetic energy of the object.
We can begin by finding the spring constant (k) of the spring. The spring constant is the force required to compress a spring by a certain distance. We can use the information given to us in the problem to find the spring constant:
k = F / x = 334 N / 0.024 m = 13,916.67 N/m
Now we can use the spring constant, the compression distance (3.5 cm) and the mass of the block (1.15 kg) to find the work done on the block as it compresses the spring:
work = 1/2 * k * x^2 = 1/2 * 13,916.67 N/m * (0.035 m)^2 = 97.4 J
Since the block is released from rest, its initial kinetic energy is zero. So, the work done on the block as it compresses the spring is equal to its final kinetic energy.
We know that the block slides down on a frictionless incline, so we need to consider the work done by gravity on the block during its motion. The work done by gravity is given by the equation:
work = force * distance * cos(theta)
where force is the force of gravity acting on the block, distance is the distance the block slides down the incline and theta is the angle of the incline with the ground.
force = m * g , where m = 1.15 kg and g = 9.8 m/s^2
distance = s
theta = 35°
substituting the values
work = (1.15 kg * 9.8 m/s^2) * s * cos(35°)
Now we can add the work done by gravity to the work done by the spring to find the total work done on the block.
work = 97.4 J + (1.15 kg * 9.8 m/s^2) * s * cos(35°) = 97.4 J + (11.37 N) * s * cos(35°)
Now we can solve for s, the distance the block travelled.
s = (97.4 J) / (11.37 N * cos(35°))
The final answer will be in meters.