4 years ago

Describe the energy transformations that occur when you bounce a ball?

Physics

2 answers:

Gemiola [76]4 years ago

7 0

The transformation is kinetic energy

Semmy [17]4 years ago

4 0

The potential energy of the ball changes into kinetic energy.

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Which has a greater mechanical advantage. a doorknob or screwdriver?

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Answer:

screwdriver should be the awnser is what I think

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3 years ago

A light ray traveling from a higher index of refraction medium into a lower index of refraction medium (for example, from water

masya89 [10]

Answer:

option C

Explanation:

The correct answer is option C

When the ray of light pass from higher refractive index to lower refractive index then the light bend away from the normal.

when the refracted ray is parallel to the boundary of the medium, θ₂ = 90°

and the incident angle θ₁

so, the angle θc is known as the critical angle.

At critical angle the refracted ray becomes parallel to boundary surface.

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3 years ago

What two measurements of a wave do you need to calculate its speed?

poizon [28]

Frequency and Wavelength

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3 years ago

all bearings are made by lebng spherical drops of molten metal fall inside a tall tower – called a shot tower – and solidify as

Wewaii [24]

Answer:

Part b)

h = 78.5 m

Part c)

v = 39.24 m/s

Explanation:

Part b)

If ball need t = 0 to t = 4 s then height of the tower is the total displacement of the ball in t = 4 s interval

here if ball start from rest

then its displacement is given as

$\Delta y = \frac{1}{2}gt^2$

$\Delta y = \frac{1}{2}(9.81)(4^2)$

$\Delta y = 78.5 m$

Part c)

Speed of the bearing at the end of the motion of the ball

$v_f = v_i + at$

$v_f = 0 + (9.81)(4)$

$v_f = 39.24 m/s$

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3 years ago

Some people think that coloured filters add colour to white light. Why is this not correct

Elis [28]

Answer:

White is every colour.

Explanation:

The filters make whatever they are colour stronger.

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3 years ago

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