3 years ago

The number of neutrons is equal to the atomic number minus the atomic mass true or false

Physics

1 answer:

muminat3 years ago

5 0

Answer:

true,

Explanation:

when you add the number of protons to the number of nuetrons you will get the atomic mass

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A stone is dropped from rest from the top of a cliff into a pond below. If its initial height is 10 m, what is its speed when it

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Answer:

14 m/s

Explanation:

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$v^2 -u^2 = 2gh$

where

v is the final speed of the stone as it reaches the water

u = 0 is the initial speed

g = 9.8 m/s^2 is the acceleration

h = 10 m is the distance covered by the stone

Solving for v, we find

$v=\sqrt{u^2+2gh}=\sqrt{0+2(9.8 m/s^2)(10 m)}=14 m/s$

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so we can write it as

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now we know that

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$v_f = 3 m/s$

$v_i = 0$

$\Delta t= 0.2 s$

from above equation

$F = \frac{60(3 - 0)}{0.2} = 900 N$

so he will experience 900 N force in above case

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They differ because they are transverse wave. That is their direction of travel is perpendicular to its vibrations.

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1 and 4 is the answer

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