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3 years ago

If a baseball's velocity is increased to four times its original velocity, by what factor does its kinetic energy increase

Physics

1 answer:

jeyben [28]3 years ago

8 0

Answer:

16 times

Explanation:

Original

KE(i) = 1/2mv²

After increasing

KE(f) = 1/2m(4v)²

KE(f) = 8mv²

KE(f)/KE(i) = 8 x 2 = 16

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Waves diffract the most when their wavelength is?

Margarita [4]

<h2>Answer: about the same size of the gap </h2>

Diffraction happens when a wave (mechanical or electromagnetic wave, in fact, any wave) meets an obstacle or a slit .When this occurs, the wave bends around the corners of the obstacle or passes through the opening of the slit that acts as an obstacle, forming multiple patterns with the shape of the aperture of the slit.

Note that the principal condition for the occurrence of this phenomena is that <u>the obstacle must be comparable in size (similar size) to the size of the wavelength. </u>

<u></u>

In other words, <u>when the gap (or slit) size is larger than the wavelength</u>, the wave passes through the gap and does not spread out much on the other side, but when the gap size is equal to the wavelength, maximum diffraction occurs and the waves spread out greatly.

Therefore:

<h2>Waves diffract the most when their wavelength is <u>about the same size of the gap</u> </h2>

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4 years ago

A stick of mass m and length / is pivoted at one

AfilCa [17]

Answer:

Potential Energy = mgl (1 - cosθ)

Explanation:

<h3>Given :-</h3>

Mass of stick = m
Length of stick = l
Angle = θ

Increase potential energy

<h3>Solution :-</h3>

✪ <u>According to the given </u><u>data</u> :-

⠀⠀⠀→ cosθ = ᵇ/ₕ

⠀⠀⠀→ cosθ = ᴬᴮ/l

⠀⠀⠀→ AB = l cosθ

❂ <u>For </u><u>Height</u> :-

⠀⠀⠀→ h = l - l cosθ

⠀⠀⠀→ h = l (1-cosθ)

☯ <u>As we know that</u>

⠀⠀⠀→ Potential Energy = mgh

⠀⠀⠀→ Potential Energy = mg × l (1-cosθ)

⠀⠀⠀→ Potential Energy = mgl (1-cosθ)

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3 years ago

How does the earth move within the solar system?

Morgarella [4.7K]

The earth rotates (spins) at the same time as it orbits in a circular motion around the sun. fun fact : it takes 365 days to complete 1 orbit for 3 years and then 366 days for a leap year! you don't have to put that last part but maybe for some extra points you can!

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3 years ago

Can I see the work for number 55

OLEGan [10]

Don't spam dude it's really bad pls just dont

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3 years ago

Write a scientific question that is specific and testable. Jack and Jill when up a hill to fetch a pail of water. Once they got

Naya [18.7K]

The scientific method consists of making an observation, ask a question, formulate hypothesis, predict, test, iterate

The scientific question that can be asked is; <u>What is the </u><u>depth of the well</u>

<u />

The reason why the above question is appropriate is as follows:

The items Jack and Jill found at the well

No pail

A stopwatch

Nine equal sized rocks

The information they can get using what they found are;

The time it takes the rock to reach the water surface in the well

The depth of the well

The well's depth, <em>h</em>, is given using the equation of free fall, as follows;

$h = \dfrac{1}{2} \cdot g \cdot t^2$

Where;

g ≈ Acceleration due to gravity ≈ 9.81 m/s²

By recording the time each rock takes to reach the water surface in the well, the average depth of the well, $h_{ave}$ , can be found by finding the average of the 9 calculated values for <em>h</em> using the 9 stones

Therefore;

The scientific question that is specific and testable is <u>how </u><u>deep </u><u>is the </u><u>well</u><u>, or what is the well's depth</u>

Learn more about scientific method here:

brainly.com/question/13096299

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3 years ago