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3 years ago

9

a rock is at the top of a 20 meter tall hill the rock has a mass of 10 kg how much potential does it have

1 answer:

Gnom [1K]3 years ago

3 0

Answer:

sonic speed potential boiiii

Explanation:

cus god gave sonic 100000 kg and super speed

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1. A soccer ball is kicked horizontally off a cliff with an initial speed of 8 m/s and lands 16 m from the base of

lana66690 [7]

Answer:

Height of cliff = S = 20 m (Approx)

Explanation:

Given:

Initial velocity = 8 m/s

Distance s = 16 m

Starting acceleration (a) = 0

Computation:

s = ut + 1/2a(t)²

16 = 8t

t = 2 sec

Height of cliff = S

Gravitational acceleration = 10 m/s

S = 1/2a(t)²

S = 1/2(10)(2)²

Height of cliff = S = 20 m (Approx)

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A wire with a resistance R is lengthened to 3.07 times its original length by pulling it through a small hole. Find the new resi

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Explanation:

Below is an attachment containing the solution.

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3 years ago

a concave mirror has a focal length of 18 cm. where will an image form if an object is placed 58 cm from the mirror

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Answer:

here

Explanation:

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What is the approximate wavelength of a light whose second-order dark band forms a diffraction angle of 15.0° when it passes thr

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414nm just took the test

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3 years ago

Read 2 more answers

A 50-kg toboggan is coasting on level snow. As it passes beneath a bridge, a 20-kg parcel is dropped straight down and lands in

timama [110]

Answer:

$KE2/KE1=0.71$

Explanation:

By conservation of the linear momentum:

m1*V1 = (m1+m2)*V2

Solving for V2:

$V2 = \frac{m1}{m1+m2}*V1$

The kinetic energies are:

$KE1=1/2*m1*V1^2$

$KE2 = 1/2*(m1+m2)*V2^2$

$KE2 = 1/2*(m1+m2)*(\frac{m1}{m1+m2}*V1)^2$

Simplifying:

$KE2 = 1/2*\frac{m1^2}{m1+m2}*V1^2$

The ratio will be:

$KE2/KE1=\frac{1/2*\frac{m1^2}{m1+m2}*V1^2}{1/2*m1*V1^2} =\frac{m1}{m1+m2}$

$KE2/KE1=0.71$

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3 years ago