Answer:
The lens of the eye is a convex lens. It fine-tunes the focus so an image forms on the retina at the back of the eye. Tiny muscles control the shape of the lens to focus images of close or distant objects. The retina is a membrane lining the back of the eye.
A 20 kg box is being pulled across a floor by a horizontal rope. The tension in the rope is 99 Newtons. The coefficient of friction is 0.25. What is the force of friction on the box? What is the acceleration of the box?
Answer:
friction = 49 N, a = 2.5 m/s/s
Explanation:
big brain
What does potential energy depend on?
Q: What does potential energy depend on?
A: Pontential energy depends on the mass of an object and it's distance.
X-Rays can reveal an objects temperature since temperature determines the wavelength of its radiation. The ________ the object, the _________ the wavelength is.
PLEASE HELP!
Answer: I think the answer is "hotter" the "bigger"
Explanation:
X-Rays can reveal an objects temperature since temperature determines the wavelength of its radiation. The HOTTER the object, the BIGGER the wavelength is because if tempeture determines wavelength then the hotter it is the bigger the wavelength would be and vice versa. Hopefully that helped. im not 100% sure.
How do you think the weather and climate might change in the area around Mt. Everest?
Answer:
It does change if the weather is bad then very soon the climate will turn bad when the climate is unfavourable then the sourrounding will be affected. For example if the area around the Mt. Everest is Hot & Humind the ice would start melting & it would lead to way more issues.
12 POINTS PLUS MARKF BRAINILEST
Answer:
gas
Explanation:
occurs when a wave moves from one medium to another medium with diffrent properties. What is the word to this definition?
1 The drop of food coloring spreads slowly.
2 The drop of food coloring spreads very quickly.
A student places a drop of food coloring into two water samples. Her observations are shown in the table. Which statement best explains the observations in the table?
(1 point)
The water molecules of sample 1 are transferring more kinetic energy.
The water molecules of sample 1 are moving faster.
The temperature of sample 2 is close to freezing.
The temperature of sample 2 is higher.
Answer: The water Molecules of sample 1 are moving faster
Explanation:
The temperature of the sample in which the color spreads quickly is higher than sample 1. Hence, statement d is correct.
What is kinetic energy?Kinetic energy of a substance is the energy generated by virtue of its motion. It is dependent on the mass and velocity of the substance. Temperature of the system also affects the kinetic energy of substance.
According to kinetic theory of matter, as thermal energy increases, kinetic energy of the particles also increases leading to more effective collisions results in reactions.
Here, the color spreads more easily in sample 2 because the higher temperature of the solution provide enough thermal energy for the liquid particles to gain kinetic energy to easily move through the solution. Thus, statement d is correct.
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1
Record temperature of water.
Put ice in water.
Record temperature after ice melts.
2
Put ice in water.
Touch water to determine if it feels colder after ice melts.
3
Measure the mass of the water.
Put ice in water.
Measure the mass of water as ice cubes melt.
4
Determine temperature and mass of water.
Put ice in water.
Record the time for ice to melt.
A student lists some possible ways to investigate the transfer of kinetic energy using ice in a sample of water. Which procedure would be best to investigate the transfer of kinetic energy?
(1 point)
3
1
2
4
A student lists some possible ways to investigate the transfer of kinetic energy using ice in a sample of water. The procedure would be best to investigate the transfer of kinetic energy is Determine temperature and mass of water. Put ice in water. Record the time for ice to melt. Therefore, option 4 is correct.
What do you mean by kinetic energy ?The term kinetic energy is define as the energy of motion, observable as the movement of an object. The formula of kinetic energy is as follows:
Kinetic energy = 1/2 mv²
Kinetic energy exists in every moving object and particle. Kinetic energy is demonstrated by a person walking, a soaring baseball, a crumb falling from a table, and a charged particle in an electric field.
Kinetic energy is the energy held by a moving object. Kinetic energy exists in the earth's rotation around the sun, you walking down the street, and molecules moving in space.
Thus, option 4 is correct.
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PLS HELP! I WILL GIVE BRAINLIEST TO FIRST ANSWER
The distance versus time graph for Object A and Object B are shown. (3 points)
Which statement best describes the motion of Object A and Object B?
Both objects move with variable speed.
Both objects move with constant speed.
Object A moves with constant speed and Object B moves with variable speed.
Object A moves with variable speed and Object B moves with constant speed.
Answer:
Explanation:
Object A moves with variable speed and Object B moves with constant speed.
Summarize what you learned this week about the electromagnetic spectrum
HINT: What is it? What does it organize? How do we use these EM waves in our lives?
Answer:
I only really know the "How do we use these EM waves in our lives?" part srry
Explanation:
EM waves are used to make sure you cellphone, radio, TV, and etc. have service/ connection.
A force of 1000 pounds drags a truck 50 feet in 10 seconds.
How much work is accomplished?
How much power was required?
Work = 50, 000 ft-lbs, Power = 5000 ft-lbs/sec
Work = 50,000 ft-lbs, Power = 500 ft-lbs/sec
Work = 5,000 ft-lbs, Power = 500 ft-lbs/sec
Answer:
The first one (Work = 160,000 Nm, Power = 160, 000 Nm/sec)
Explanation:
hope this helps :)
A force of 1000 pounds drags a truck 50 feet in 10 seconds. then the work accomplished is 50000 lbs feet and the power required was 5000ft-lbs/sec.
What is Force ?Force is responsible for the motion of an object. it produces acceleration in the body. According to newton's second law force is mass times acceleration i.e. F =ma. Its SI unit is N which is equivalent to kg.m/s². There are two types of forces, balanced force and unbalanced force. Balanced forces are those forces which are opposite in direction and equal in magnitude. When Net force acting on a body is zero then we call it as balanced force. Balanced force is not responsible for the motion of the body. ex. when two persons pulling rope on both end with equal magnitude which cause them to be balanced force have 0 net force. Unbalanced forces are those when resultant of all the forces is not equal to zero is called as unbalanced force. unbalanced force is responsible for the motion of the body.
Given,
F = 1000 pound
s = 50 feet
t = 10 s
Work = F.s = 1000 * 50 = 50000 lbs feet
Power = Work/time = 50000/10 = 5000ft-lbs/sec
Hence option A is correct.
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The sleigh is being pulled with a force of 800N and has a mass of 200 Kg.
What is the acceleration in m/s/s?
Answer:
a = 4m/s²
Explanation:
Given:
F = 800N
m = 200 kg
Unknown:
acceleration or a
Formula and solution:
a = F/m
a = 800 kg.m/s² ÷ 200 kg
Final Answer:
a = 4 m/s²
in the solution there's a two same unit and that is kg so the same unit will be cancelled and the rest is going to aapply in the answer that is 4 so if combine it the final answer is 4 m/s²
HELP FAST ONLY CORRECT ANSWERS 15 PT
Research the Moon to understand why only one side of the Moon is observable from Earth. If this was the case with the Earth-Sun system, what would be Earth’s period of rotation?
Answer:
We only see one side of the moon due to the synchronous rotations and the earth rotation ration is approximately 27 days
Explanation:
HELP NEEDED
What would be an example of something being brittle? *
a fishing pole
a bowling ball
a cupcake
an airplane
Answer:
Explanation:
A fishing pole maybe?
Answer:
A aieplane
Explanation:
Because brittle means hard but liable to break or shatter easily.
List each layer of the earth, starting at the crust, and identify one characteristic of each layer.
Answer:
Hope it helps
Explanation:
The inner core is solid, the outer core is liquid, and the mantle is solid/plastic. This is due to the relative melting points of the different layers (nickel–iron core, silicate crust and mantle) and the increase in temperature and pressure as depth increases
can u plzz help meee
When a physical or chemical change occurs, the law of conservation of mass always applies. What happens to the atoms during a chemical change, according to this law?
Group of answer choices
Atoms disappear
Atoms are created.
Atoms are destroyed.
Atoms are rearranged.
Amy weighs 35 kg and her dad weighs 85 kg. They are roller skating. Amy challenges her dad to race. They stand poised at the starting line. Her dad yells, “Go!” Who will go faster and why?
Answer:
Amy because she was less than her dad and due to the dads weight being more it'll add friction to the skates which will slow him down.
Explanation:
Answer:
Amy will win because she ways less than her dad.
Explanation:
the spreading out of waves after passing through a small opening. What is the word to this definition? HELP!!
Answer:diffraction
Explanation:
Answer:
Refelction
Explanation:
look it up that is what it says
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Which factor can decrease the kinetic energy of an object? (3 points)
Increase in speed
Decrease in speed
Increase in temperature
Decrease in volume
Answer:
Decrease in speed
Explanation:
Increasing an object's velocity can decrease kinetic energy. *The velocity of an object has no effect on kinetic energy. *Increasing an object's velocity can increase kinetic energy. Increasing an object's velocity can increase kinetic energy.
If you put food coloring in room temperature water, the coloring spreads throughout the water.
The water causes the color to spread mainly because:
•the food coloring is heavy
•food coloring molecules are small
•the water is warm
•the water molecules are in motion
Answer: Water molecules are in motion
In the word "hydroelectricity," which of the following does the prefix "hydro-" relate to? Choose the best answer.
We didn't get any answer options but here's my answer anyways...
Hydro power is electrical energy produced through the power of moving water. Power obtained from the (typically gravitational) movement of water., Hydropower plants derive energy from the force of moving water and harness this energy for useful purposes...
Hope is helped!
PLEASE. A 20 kg box is being pulled across a floor by a horizontal rope. The tension in the rope is 99 Newtons. The coefficient of friction is 0.25. What is the force of friction on the box? What is the acceleration of the box?
Answer:
Force of Friction = -50 (N)
Acceleration = 2.45 (m/s^2)
Explanation:
Force of Friction = f = N * coefficient of friction
N = m * g
=> Force of Friction = m * g * coefficient of friction
f = 20 * 10 * -0.25 = -50 (N)
------------------------------------------------------
(1) F net = F + f
(2) F = m * a
(1) F net = 99 - 50 = 49
(2) a = 49 / 20 = 2.45 (m/s^2)
What is true about the force acting on the cars at the end of a roller coaster ride as they slow down right before stopping?
The cars will slow down as a result of unbalanced forces and negative acceleration.
What is Inertia?Inertia is the ability of an object to continue its current motion until and unless some external force causes its speed or direction to change. Inertia is described in the Newton's first law of Motion.
The cars are slowed due to negative acceleration of the object eventually to a stop, because of these unbalanced forces due to friction which are acting on them. The riders, which have inertia, are also acted on by the unbalanced forces throughout the ride causing them to change their state of motion.
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Can someone tell me the answer to this?
Answer:
A
Explanation:
Answer:
A
Explanation:
Describe the units used to measure mass and volume.
Answer:
Mass measures the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg). Volume measures the amount of space that a substance or an object takes up. The basic SI unit for volume is the cubic meter (m3)
PLEASE HELP!! IM TIMED!! WILL MARK BRAINLIEST!! 13 POINTS!! SCIENCE!!
What best explains the source of light energy and heat energy produced by a star?
A. Dense metals, such as iron, explode in the core of a star.
B. Explosions from a nearby supernova provide fuel to the star.
C. Nuclear reactions involving the fusion of atoms occur in the core of a star.
D. High-energy radiation from nearby stars penetrate the core of a star.
Answer:
C
Explanation:
What purpose would the sand serve?
FIRST ONE TO ANSWER CORRECTLY GETS BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Sand can also refer to a textural class of soil or soil type; i.e., a soil containing more than 85 percent sand-sized particles by mass.
Explanation:
Interesting fact...
Why are there differences between the cooling rates of sand and water? Sand cools off faster than water because sand is a solid. Water heats up slower and cools off slower than sand. Sand heats up faster and cools off faster than water.
As a variable and to count as land. As if you were at a beach, this sand would count as the sand that the sun would be beaming on. ^^
-Answer
write a motivational speech to someone who wants to become a scientist please write this as it is for kids :) PLEASEE HELP!!!!
Answer:
A motivational speech for a to be scientist. Crazy experiments and more you have the right to be whatever you adore. Your young yet strong everything will come along. I believe in you and so should you since your becoming a scientist you’ll acquire it soon. You’ll discover new things and sight to see when you become a scientist make sure to call me. :)
Explanation:
Hope it’s good I made up a couple words that rhyme good luck!
The equation shows a chemical reaction using 64 grams of calcium, 162 grams of zinc carbonate, and 152 grams of calcium carbonate.
calcium + zinc carbonate → calcium carbonate + zinc
According to the law of conservation of matter, how much zinc is present in the product?
Group of answer choices
74 grams
98 grams
88 grams
64 grams