Answer:
Alloys are just mixtures of metal and metalloids are metallic substances with properties of metal.
Answer:
metalloids are chemical elements that form substances that have properties of metals and non metals while alloys is a mixture of metals
what are various paradox related to time travel?
Answer:
This is a paradox — an inconsistency that often leads people to think that time travel cannot occur in our universe." A variation is known as the "grandfather paradox" — in which a time traveler kills their own grandfather, in the process preventing the time traveler's birth
Explanation:
hope this Wil help ....
Light travels at 3.0 × 108 m/s in a vacuum. use the index of refraction for water to determine the speed of light in water. round your answer to the nearest tenth. × 108 m/s
Answer:
the answer is 2.3. I just answered this question and got it right.
Explanation:
The phenomenon bending of a wave as it crosses from one medium to another is said to be refraction. The speeds of light in the water will be 2.25×10⁸ m/sec.
What is the definition of refraction?The phenomenon bending of a wave as it crosses from one medium to another is said to be refraction. The difference in density is the cause of the bending.
Refraction is a term that is used to describe the phenomenon of refraction."The change in direction of a wave traveling through one medium to another is known as refraction."
The following data are given in the problem;
C is the Speed of light in a vacuum =3×10⁸ m/sec.
n is an index of refraction for water = 1.333
v is the speed of light in the water=?
The index of refraction is the ratio of the speed of light in a vacuum to the speed of light in water. By the formula of the index of refraction.
[tex]n=\dfrac{c}{v}[/tex]
[tex]V=\dfrac{c}{n}[/tex]
[tex]V=\dfrac{3\times10^8}{1.333}[/tex]
[tex]V=2.25\times 10^8 m/s[/tex]
Hence the speed of light in the water will be 2.25×10⁸ m/sec.
To learn more about refraction refer to the link;
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If an electron, moving from east to the west, enters a uniform magnetic field what is the direction of the magnetic field
Answer:
The electron moves undeflected through the field
what is the power of a device with resistance 1000 ohms if a current of 8a is flowing through it? give your answer in watts.
You have to find voltage first.
1000×8= 8000V
Then you use the formula P=IV
P=(8)(8000)
P=64,000 Watts
I think this is right
Because of the costs involved in maintaining high temperatures and pressure, nuclear _______ is not yet a practical method for generating electrical energy.
Which best completes the statement?
fusion
fission
energy
generators
Answer:
A
Explanation:
i just took the test
Answer:
A - Fusion !
Explanation:
Person above me is correct, I just took "The Impact of Human Activity" Unit Test.
11. Which of the following gives the correct relation between the acceleration due to gravity and period of a pendulum?
g = 2πLT2
g = 4π2LT2
g = 2πLT
g = 2π2LT
Please show all of your algebra.
[tex]\\ \rm\rightarrowtail T=2\pi\sqrt{\dfrac{l}{g}}[/tex]
Derive g[tex]\\ \rm\rightarrowtail T^2=4\pi^2\dfrac{l}{g}[/tex]
[tex]\\ \rm\rightarrowtail g=\dfrac{4\pi ^2\ell}{T^2}[/tex]
[tex]\\ \rm\rightarrowtail g=\left(\dfrac{2\pi\sqrt{l}}{T}\right)^2[/tex]
Which temperature scale does NOT have negative values?
Celsius
Fahrenheit
Kelvin
All of these are correct
Answer:
Kelvin scale degrees
Explanation: The Kelvin scale starts at 0°k, the lowest possible temperature, as at this point, all movement stops at an atomical level.
Answer:
Kelvin
Explanation:
Kelvin is the only temperature scale that when it hits 0, the universe would be frozen. it is the lowest possible temperature.
Why is a 1 solar-mass red giant more luminous than a 1 solar-mass main sequence star?.
Answer:
No
Explanation:
I dont know please help
Find fff, the magnitude of the force applied to each side of the nutcracker required to crack the nut
Force is a vector, as such we know that the force required to crack a nut is the resultant of the individual forces applied form all sides of the nut.
What is force?The term force is used to describe that which causes a change in the position of an object. Now the question is incomplete but I will try to help you the much I can.
Recall that force is a vector quantity. Hence the magnitude of the force required to crack a nut is the resultant of the individual forces applied form all sides of the nut.
Learn more about force: https://brainly.com/question/26115859
An iron sphere of radius 0.18m has mass 190 kg. Calculate the density of the iron
Volume:-
[tex]\\ \sf\rightarrowtail \dfrac{4}{3}\pi r^3[/tex]
[tex]\\ \sf\rightarrowtail \dfrac{4}{3}\pi (0.18)^3[/tex]
[tex]\\ \sf\rightarrowtail \dfrac{4}{3}\pi (0.005832)[/tex]
[tex]\\ \sf\rightarrowtail 0.024m^3[/tex]
Mass=190kgDensity:-
[tex]\\ \sf\rightarrowtail \dfrac{Mass}{Volume}[/tex]
[tex]\\ \sf\rightarrowtail \dfrac{190}{0.024}[/tex]
[tex]\\ \sf\rightarrowtail 7916.67kg/m^3[/tex]
A man tries to push a 200 kg Car that moves at a acceleration 0.50 m/s2. The man is able to displace the car 10 m. How much work did he do?
The work done by the man pushing the car over the given distance is 1000J.
Given the data in the question;
Mass of car; [tex]m = 200kg[/tex]Acceleration of the car; [tex]a = 0.5m/s^2[/tex]Distance covered by the car; [tex]d = 10m[/tex]Work done; [tex]W = \ ?[/tex]
Work done is simply defined as the energy transfer that takes place when an object is either pushed or pulled over a certain distance by an external force. It is expressed as;
[tex]Work\ done = f * d[/tex]
Where f is force applied and d is distance travelled.
To determine the work done by the man, we first solve for the force applied F.
From Newton's Second Law; [tex]Force \ F = m * a[/tex]
We substitute our given values into the expression
[tex]F = m * a \\\\F = 200kg * 0.5m/s^2\\\\F = 100kg.m/s^2[/tex]
Next we substitute our values into the expression of work done above.
[tex]Work \ done = f * d\\\\Work \ done = 100kg.m/s^2 * 10m\\\\Work \ done = 1000kgm^2/s^2\\\\Work \ done = 1000J[/tex]
Therefore, the work done by the man pushing the car over the given distance is 1000J.
Learn more about work done: https://brainly.com/question/26115962
Which property of the sound wave changes when the volume is increased on a radio?.
Answer:
amplitude
Explanation:
When we increase the volume of a sound, the amplitude of the wave is increased. The frequency of a wave is related to its pitch. If the pitch is high, then the frequency of the wave is high. This means that the wave will looked squashed on an oscilloscope trace.
what is the weight of an object (on earth) that has a mass of 4.5kg
weight=
mass=
gravity=
formula:
substitution:
answer:
Answer:
weight-44.1 kg- mass-4.5kg gravity-9.8 formula-(see explanation)
Explanation:
force/weight on earth is = mass x gravitational field strength
For ____________, the error is calculated by finding the sum of squared distance between actual and predicted values
Answer: It is minimising
For minimizing, the error is calculated by finding the sum of the squared distance between actual and predicted values.
What is the error?The difference between the measured and analysis of the financial statements might well be defined as an error. For instance, if the two operators use the same complete and precise tool.
We have:
For ____________, the error is calculated by finding the sum of the squared distance between actual and predicted values
The correct answer is minimizing because according to the information provided in the problem. The sum of squared distance between actual and anticipated values is calculated to "minimize" the mistake.
This is one of the most significant aspects of statistics, and it involves mathematical computations involving error calculations for various values.
Thus, for minimizing, the error is calculated by finding the sum of the squared distance between actual and predicted values.
Learn more about the error here:
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A boy walks up a hill. His displacement from his starting point is (800, 150) m. How much gravitational potential energy has he gained?
Answer:
The potential energy gained is 1500m joule.
Explanation:
Hope this helps!
Answer:
Answer: He 1500m joule amount of gravitational potential energy
Explanation:
Good Luck
hope it helps
Mark as brainliest please
a person walks 15.0 m in 5.00 s, and then walks 12.0 m in 10.00 s. What is the average
speed of the person?
A group of physics students set a tuning fork of 500 Hz just above a big cooking pot. The tuning for is struck and continues to ring throughout the experiment. The students pour water into the pot until they hear the resonance of the fundamental mode.
If the cooking pot is 0.2 meters tall, how long is the wavelength of the resonance created?
What is an estimate for the speed of sound in this situation?
You may discover that the speed of sound seems a bit off. Write down some ideas on why that is.
(a) The wavelength of the resonance created is 0.8 m.
(b) The speed of the sound in the fundamental mode is 400 m/s.
(c) The low value of speed of speed of sound in water calculated may be as a result of low temperature of the water poured into the cooking pot.
Wavelength of the resonance createdThe wavelength of the resonance created is determined by assuming the cooking pot to be a closed pipe.
Wavelength of fundamental mode of a closed pile = 4L
where;
L is length of the pipeλ = 4 x 0.2 = 0.8 m
Estimated speed of soundThe speed of the sound in the fundamental mode is calculated as follows;
v = fλ
v = 500 x 0.8
v = 400 m/s
Sound wave is directly proportional to temperture, as the temperature of the water increases, the speed of sound increases as well.
The low value of speed of speed of sound in water calculated may be as a result of low temperature of the water poured into the cooking pot.
Learn more about speed of sound here: https://brainly.com/question/2142871
C(i). A body weighs 600g in air and 400g in water. Calculate;
i. Up thrust of the body
ii. Volume of the body
iii. Relative density of the solid
iv. Density of the solid
Answer:
B buoyant force (mass) = 600 - 400 = 200 g (I)
upthrust is 200 g due to decrease in apparent body weight
(Note that g is being treated as force here when it is actually mass)
D = M / V definition of density
since density of water is 1 (1 g / cm^3)
from (I) the equivalent volume of water is 200 cm^3 since the upthrust will equal the weight of the water displaced
Relative density of solid is 600 g / 200 g = 3 (weight of solid vs the weight of the water displaced
D = 3 g / cm^3 density of solit
What type of gas absorbs and re-emits infrared radiation?.
Answer:
Carbon Dioxide absorbs and re-emits the infrared radiation.
Choose all the answers that apply.
The United States
launched the first man into space
built the first space station
sent the first animal into space
was the first country to send a person to the moon
successfully landed å spacecraft on the moon
Answer:
launched the first man into space
was the first country to send a person to the moon
successfully landed å spacecraft on the moon
Sigmund freud believed mental disorders were caused when an individual __________. a. recognized personal negative qualities b. masked painful feelings c. buried feelings in the unconscious d. distorted the present reality
Answer:
C. buried feelings in the unconscious
Explanation:
Hope that helps!
Sigmund Freud believed mental disorders were caused when an individual has buried feelings in the unconscious.
What exactly are mental disorders?Mental disorders are illnesses that impact your thoughts, feelings, emotions, and behavior.
They might be short-term or long-term. They can have an impact on your capacity to interact with others and operate on a daily basis.
There are several sorts of mental illnesses. Panic disorder, obsessive-compulsive disorder, and phobias are examples of anxiety disorders.
Depression, bipolar illness, and other mood disorders are all examples of mood disorders.,
To learn more about the mental disorder refer to the link;
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If all of the resistors in the circuit were decreased in value by a factor of 1,000, would the current in each resistor simply increase by a factor of 1,000? explain your answer
In a circuit, if the resistors were decreased by a factor of 1,000, it is true that the current would increase by a factor of 1,000, according to Ohm's Law.
What is Ohm's Law?It is a law in electricity that posits that the voltage that goes through a conductor is directly proportional to the current.
How does Ohm'slaw explain the change in current?One formula in Ohm's law is:
Voltage = Current x Resistance
If the resistance were to decrease by a factor of 1,000, the current would have to increase by a factor of 1,000 as well in order to give the same voltage.
Find out more on Ohm's law at https://brainly.com/question/14296509.
A particular lightbulb is designed to consume 40 W when operating on a car's 12-V DC electric power. If you supply that bulb with 12-V AC power from a transformer, how much power will it consume
Conduction is greater in solids .explain in your own words Why?
Explanation:
because conduction takes place in objects whose particles are close/touching each other therefore conduction happens in solid as liquid and gas paricles are not close to each other
if the impulse acting on an object is 100n waht is force acting on it if the time 1 s
force = 100 N
Impulse ( N.s ) : Force ( N ) * Time ( s )⇒ 100 N.s = force * 1 s
⇒ force = 100/1
⇒ force = 100 N
Answer :-
The required Force is 100 Newton .Explanation :-
As per the provided information in the given question, we have been given that the Impulse of the Object is 100 Ns . It's Time is given as 1 sec . And, we have been asked to calculate the Force .
For calculating the Force , we will use the Formula :-
[tex] \bigstar \: \: \: \boxed {\sf { \: Force \: = \: \dfrac {Impulse}{Time} \: }} [/tex]
Therefore , by Substituting the given values in the above Formula :-
[tex] \dag \: \: \: \sf {Force \: = \: \dfrac {Impulse}{Time}} [/tex]
[tex] \Longrightarrow \: \: \: \sf {Force \: = \: \dfrac {100}{1}} [/tex]
[tex] \Longrightarrow \: \: \: \textbf {\textsf {Force \: = \: 100}} [/tex]
Hence :-
Force = 100 Newton .[tex] \underline {\rule {180pt}{4pt}} [/tex]
Question 4 of 5
The picture shows a model of a cell.
W
What is the main function of the part labeled Win the model?
Explanation:
it is not clear. I can't see w.
Calculate the volume of 500 kilograms
to 2 decimal places
flead if the density of lead is 11400 kg/m². Give your answer
Enter your answer to 2 decimal places
Answer:
d (density) = M / V
V = M / d = 500 kg / (11400 kg / m^2 = .044 m^3
A bus start moving from rest .If its velocity after 5 seconds becames 10 m/s ,find acceleration
Answer:
2 [tex]m/s^{2}[/tex]
Explanation:
acceleration = (final-initial velocity) / time
= (10-0)/5
=2
1. The Particle Theory of Matter says that. A. Particles are in constant motion
b. Everything is made up of particles
c. Plasmas have charged particles
d. Solids have no particles
Answer:
a. Particles are in constant motion.
When charging objects by induction which of the following must be true
A. A path to ground is not needed when using a positive source
B. The objects being charged must be conductors
C. The objects takes on the same charge as it's source
D. The source loses some of its charge
Answer:
C
Explanation:
because that's how science works