When a .22-caliber rifle is fired, the expanding gas from the burning gunpowder creates a pressure behind the bullet. this pressure causes the force that pushes the bullet through the barrel. the barrel has a length of 0.61 m and an opening whose radius is 2.8 x 10²³ m. a bullet (mass = 2.6 x 10²³ kg) has a speed of 370 m/s after passing through this barrel. ignore friction and determine the average pressure of the expanding gas.

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

m = Mass of bullet =

r = Radius of barrel =

Pressure is given by

The pressure of the expanding gas is

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption