PLEASE HELP 4. A bullet of mass 30g is fired from a rifle of mass 5kg at a speed of 259m/s

a) What is the momentum of the rifle just after the bullet is fired?

b) What is the recoil velocity of the refile?​

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)