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pashok25 [27]
4 years ago
11

VOLLEYBALL TRUE OR FALSE

Physics
2 answers:
lions [1.4K]4 years ago
5 0

Answer:

True.

True.

False.

Explanation:

As a person who plays volleyball these are great questions

Volgvan4 years ago
3 0

I play high school volleyball so i know this.

Its: True

     True

     False

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How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c
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Heat energy required to change the temperature is given by

Q = ms\Delta T

here we know that

m = 225 g = 0.225 kg

s = 4186 J/kg C

T_i = 5 ^0C

T_f = 35 ^0C

now from above formula we will have

Q = (0.225 kg)(4186 J/kg C) (35 - 5)

Q = 28255.5 J

So it will remove 28255.5 J heat from the water

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Mary spins a ball in a horizontal circle on a massless string. Karen has a similar ball but
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The valence electrons of metals are weakly attracted to the parent nuclei, so the electrons break free and float. The moving ele
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3 years ago
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A dog is running at an initial speed of 10 m/s. He covers 50 m in 4 seconds. What is the acceleration of the dog?
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8 0
3 years ago
A meter stick moves parallel to its axis with speed of 0.96 c relative to you. What would you measure for the length of the stic
Fed [463]

Answer:

The length of the stick is 0.28 m.

The time the stick take to move is 0.97 ns.

Explanation:

Given that,

Relative speed of stick v= 0.96 c

Speed of light c= 2.99793\times10^{8}\ m/s

Proper length of stick = 1 m

We need to calculate the length of the stick

Using formula of length

\Delta l=\Delta l_{0}\sqrt{(1-\dfrac{v^2}{c^2})}

Put the value into the formula

\Delta l=1\sqrt{1-\dfrac{(0.96)^2c^2}{c^2}}

\Delta l=1\sqrt{1-(0.96)^2}

\Delta l=0.28\ m

We need to calculate the time the stick take to move

Using formula of time

t=\dfrac{\Delta l}{v}

Put the value into the formula

t=\dfrac{0.28}{0.96\times(2.99793\times10^{8})}

t=9.72\times10^{-10}\ sec

t=0.97\ ns

Hence, The length of the stick is 0.28 m.

The time the stick take to move is 0.97 ns.

7 0
3 years ago
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