Ahunter on a frozen, essentially frictionless pond uses a rifle that shoots 4.20 g bullets at 965 m/s. the mass of the hunter (including his gun) is 72.5 kg, and the hunter holds tight to the gun after firing it. find the recoil velocity of the hunter if he fires the rifle (a) horizontally and (b) at 56.0∘ above the horizontal.

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !

What is the temperature in degrees celsius of a substance with a tempature of 49k