A falling rock produces a force of 250 Newtons from acceleration due to gravity alone. What is the rock's mass in kilograms?

Enter your answer rounded to the nearest tenth, such as: 42.5

Steam enters an adiabatic diffuser at 150 kpa and 1208c with a velocity of 550 m/s. determine the minimum velocity that the steam can have at the outlet when the outlet pressure is 300 kpa.

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.

The energy equivalent of the rest mass of an electron is