Usain bolt can run the 100 m dash in 9.58 s. what is usain's average acceleration during this sprint?

Answers

Answer 1

Answer: Assuming Usain Bolt starts from rest (so, its initial velocity is zero), and that his motion is uniformly accelerated, his position at time t is given by
$S(t) = (1)/(2)at^2$
where a is the average acceleration and t the time. In our problem, the distance covered is S=100 m and the time taken is t=9.58 s, therefore the average acceleration can be found by re-arranging the previous formula:
$a= (2S)/(t^2)= ((2)(100 m))/((9.58 s)^2)=2.18 m/s^2$

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Sound is a example of what kind of wave

Answers

Answer: The correct answer is longitudinal wave.

Explanation:

Longitudinal wave: The vibration of the particle is parallel to the direction of the propagation of the wave.

Longitudinal wave consists of the compression and the rarefaction.

Compression is the region where the density of the particles are more. Rarefaction is the region where the density of the particles are less.

The example of the longitudinal wave is Sound wave.

Sound is an example of a longitudinal wave.

Describe how the design of a vacuum flask keeps the liquid inside hot ?

Answers

the gap between the two flasks is partially evacuated of air creating a near vacuum which significantly reduces heat transfer by conduction or convection

The gap between the two flasks is partially evacuated of air, creating a near-vacuum which significantly reduces heat transfer by conduction or convection. Vacuum flasks are used domestically to keep beverageshot or cold.

At a given location in space, the magnetic field in an electromagnetic wave is increasing. How is the electric field changing at that same location? a. The electric field is increasing.
b. The electric field is decreasing.
c. The electric field is not changing.

Answers

Answer:

Option a) is correct

Explanation:

In the given question option a) ( i.e the electric field is increasing ) is correct.

The above option is correct because the electric field and the electromagnetic wave both are in the same phase of the EM wave. Thus, the electromagnetic wave and the electric field are directly proportional to each other.

Final answer:

In an electromagnetic wave, the electric and magnetic fields are linked, oscillating in phase. Therefore, when the magnetic field is increasing, the electric field is also increasing.

Explanation:

In an electromagnetic wave, the electric field and the magnetic field are perpendicular to each other and they oscillate in phase. This means when the magnetic field is increasing, the electric field is also increasing, and vice versa. So, the correct answer is option a. The electric field is increasing. It's important to keep this correlation in mind while studying electromagnetic waves, as these oscillations and their interplay are fundamental to how these waves propagate through space.

Learn more about Electromagnetic Wave here:

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what’s 55mph to km/min? can someone explain to to me with the work so i can understand how to solve this

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Hope this helps your answer pretty much :3

What is the border between two tectonic plates called?

Answers

The boundary between two plates is known as a tectonic plate boundary.

What is tectonic plate?

The widely recognized scientific hypothesis known as plate tectonics states that the Earth's lithosphere is made up of manymajor tectonicplates that have been gently moving since around 3.4 billion years ago.

tectonic plates are formed convection currents are created by the intense heat and pressure that exists within the earth. The tectonic plates that make up the earth's crust shift as a result of these currents.

The tectonic plates move slowly, continuously, and in a variety of directions. Some of them are traveling past each other while others are moving aside from one another.

The border between two tectonic plates called boundary.

To learn more about tectonic plates refer to the link:

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The border between two tectonic plates is called a boundary.

Hope this helps!

Which one of the following temperatures is equal to 5°C?

Answers

5°C = 41°F = 278 K .

Answer:

278 K

Explanation:

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