Answer:10m/s
Explanation:
M=mass of gun=4kg
U=recoil velocity of gun
m=mass of bullet=0.1kg
V=velocity of bullet=400m/s
M x U=m x V
4 x U=0.1 x 400
4xU=40
Divide both sides by 4
(4xU)/4=40/4
U=10m/s
Recoil velocity=10m/s
Answer:
A raised weight.
Water that is behind a dam.
A car that is parked at the top of a hill.
A yoyo before it is released.
River water at the top of a waterfall.
A book on a table before it falls.
A child at the top of a slide.
Ripe fruit before it falls.
Explanation:
To solve the problem, we must use the following equation:

where
Q is the amount of heat energy absorbed by the water
m is the mass of the water
Ti and Tf are the initial and final temperature
Cs is the specific heat capacity of the water
The data we have in this problem are:
Q=40.0 kJ


m=0.500 kg
Substituting the data into the equation and re-arranging it, we find

So the final temperature of the water will be 29.1 degrees.