The barrel of a rifle has a length of 0.89 m. a bullet leaves the muzzle of a rifle with a speed of 620 m/s. what is the acceleration of the bullet while in the barrel? a bullet in a rifle barrel does not have constant acceleration, but constant acceleration is to be assumed for this problem.

215955.06 m/s^2

Explanation:

length of barrel, s = 0.89 m

initial velocity of the bullet, u = 0 m/s

Final velocity of the bullet, v = 620 m/s

Let a be the acceleration of the bullet in the barrel

Use third equation of motion, we get

a = 215955.06 m/s^2

Thus, the acceleration of the bullet inside the barrel is  215955.06 m/s^2.

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation: