Answer: 330 m
Explanation:
The speed of sound
is defined as the distance traveled by the sound wave
in a especific time
:
Where:
is the speed of sound
is half the time the sound wave travels since the person speaks, the sound wave hits the hill and then returns to the person again as an echo
is the distance between the person and the hill
So, we have to find
:


Finally:

Answer:

Explanation:
F = Force = 
m = Mass of proton = 
t = Time taken = 
Acceleration is given by


The velocity of the proton is 
Answer:
5 Days to Seconds = 432000
Explanation:
F=W=mg
12N(given)= m*9.8
m= 1.22 kg