Abattleship that is 6.00×107kg and is originally at rest fires a 1100-kg artillery shell horizontally with a velocity of 575 m/s. (a) if the shell is fired straight aft (toward the rear of the ship), there will be negligible friction opposing the ship’s recoil. calculate its recoil velocity. (b) calculate the increase in internal kinetic energy (that is, for the ship and the shell). this energy is less than the energy released by the gun powder—significant heat transfer occurs.

Part a)

v = 0.0105 m/s

Part b)

Explanation:

As per momentum conservation we know that

here we know

Part a)

now from above expression we can say

Part b)

Now increase in the internal energy of the system

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.