3 years ago

What is this object? Explain how it works and which one of Newton’s laws this represents.

Physics

1 answer:

lyudmila [28]3 years ago

4 0

Answer:

the object is called Newton's cradle balance ball you can search it on Google

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Which of the following is an example of potential energy?

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Answer:

Explanation:

potential energy is stored energy so the ball has potential energy to bounce or roll which would then have been converted to kinetic but the rest are in motion meaning energy is no longer stored but used in motion and therefore cannot be potential energy

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4 years ago

As light shines from air to water (n = 1.33) at an incident angle of 45.0 degrees what is the angle of refraction

erma4kov [3.2K]

Using Snell's law
we get
sin(I)/sin(r) = U2/U1
• where U2 represent the water's refractive index and U1 represent air's refractive index
thus
sin45°sin(r) = 1.33/1
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1/1.88 = sin(r)
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3 years ago

A container explodes and breaks into three fragments that fly off 120° apart from each other, with mass ratios 1: 4: 2. If the f

RSB [31]

Answer:

V₂ = 1.5 m/s

Explanation:

given,

speed of the first piece = 6 m/s

speed of the third piece = 3 m/s

speed of the second fragment = ?

mass ratios = 1 : 4 : 2

fragment break fly off = 120°

α = β = γ = 120°

sin α = sin β = sin γ = 0.866

using lammi's theorem

$\dfrac{A}{sin\alpha}=\dfrac{B}{sin\beta}=\dfrac{C}{sin\gamma}$

A,B and C is momentum of the fragments

$\dfrac{m\times 6}{0.866}=\dfrac{4m\times v_2}{0.866}=\dfrac{2m\times 3}{0.866}$

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Mud is the perfect environment to preserve a foot-print.

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4 years ago