A sprinter can run 100.0 meters in 10.4 seconds. Find the velocity of this runner. (Please put answer into ladder cancellation format!!)

Answers

Answer 1

Answer: Hope you get it thank you :)

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Which of these features is NOT found on the ocean floor? A. mountain B. volcano C. river D. plain
Think about multiplying the mass of each student by a factor to calculate each student’s kinetic energy. Is there a common factor that works for every student? If so, what’s this factor?
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A material that provides resistance to the flow of electric current is called a(n)

Answers

Th correct answer to this question would be, Insulator. Notice in the question it says "Material". The question is basically asking, What item resists the flow of and electric current. A resistor is a device that suppose to strain the electric current. And resistance is the measure of how well the material can conduct an electric charge. With all of that being stated, Insulator materials include paper, dry wood, rubber, glass, ect. Insulator products provides resistance.

Make sure you read the questions very carefully.

Answer: Insulator

Explanation: Insulators stop electric currents from going through

Which of the following accurately describes the differences between the SI and English systems of measurement? A. The two systems are used interchangeably in the scientific and technical communities.

B. The English system is more commonly used in Europe than in the United States.

C. The English system is preferred for use in the scientific and technical communities due to its ease of use over the SI system.

D. The SI system, which is based on the metric system, has been more widely adopted than the English system, which is harder to use.

Answers

The best answer is D. The SI system, which is based on the metric system, has been more widely adopted than the English system, which is harder to use. In order to standardize measurements, the International System of Units or the SI units are commonly used around the world since they are more easy to understand and compare than the English unit.

A racecar is traveling in uniform circular motion around a racetrack. What happens to the centripetal acceleration of the car if the speed is doubled and the radius of the circle remains constant?

Answers

Answer:

centripetal acceleration becomes 4 times

Explanation:

Given that a car is in the uniform circular motion on a circular track initially and then its speed is doubled.

Now as we know the equation for centripetal acceleration in a circular motion is given as:

$a_c=(v^2)/(r)$

where:

$a_c=$ initial centipetal acceleration

v = initial speed of the car

r = radius of the track (remains constant)

When the speed is doubled:

$a_c'=((2v)^2)/(r)$

$a_c'=(4v^2)/(r)$

$a_c'=4* (v^2)/(r)$

$a_c'=4\ a_c$

i.e. centripetal acceleration becomes 4 times in the later case.

Answer:

4 TIMES

Explanation:

As centripetal acceleration has formula a =v^2/r. as r is constant so a is directly proportional to square of speed so square of 2 is 4 hence 4 times

A large sphere has a mass of 175 kg and is suspended by a chain from the ceiling. The mass of the chain is 12.0 kg. What is the tension in the chain?1830, N1610, N1720, N1940 N.

Answers

Each point in the chain supports the weight of all the mass below it.

At the bottom end of the chain, the weight is (175 x 9.8) = 1,715 N .
At the top of the chain, the weight is (175 + 12) x (9.8) = 1,833 N .

The tension in the chain varies linearly from 1,715N at the bottom
to 1,833N at the top.

What does the photoelectric effect prove?

Answers

The photoelectric effect is the process of producing electrons when light shines upon a certain material. The photoelectric effect proves that light is made up of particles or waves which means light has a wave-particle dual nature. Such nature is also present in electrons.

What type of energy is involved when a river moves sediment and erodes its banks?a. chemical energy
b. gravitational energy
c. potential energy
d. kinetic energy

What happens as gravity pulls water down a slope?
a. Kinetic energy changes to potential energy.
b. Both kinetic and potential energy vanish.
c. Energy is stored for future use.
d. Potential energy changes to kinetic energy.

Answers

First question: The type of energy involved when a river moves sediment and erodes its banks is: option d. Kinetic energy. Kinetic energy is the energy associated with motion. A body (in this case the water) that moves has an energy associated with its motion that is proportional to the speed (exactly to the square of the speed). When the water collides with the banks it is the kinetic energy of the river that erodes it Second question: the answer is the option d. As gravity pulls water down a slope potential energy changes to knietic energy. This is the, water loses altitude and gains velocity. The potential energy. which is proportional to the height, decreases and the kinetic energy, which is proportional to the square of the speed, increases.

Answer:

Question A: D., or "kinetic energy".

Question B: D., or "Potential Energy changes to kinetic energy."

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