Which example gives all the necessary information to describe motion scientifically
1. the batter hit the ball into the stands at 90 m/s
2. a fan watched the length of the 130-m field for his favorite player
3. the first baseman was told to throw the ball quickly
4. the catcher held the fly ball in his glove for several minutes

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

What causes the formation of ocean currents?

The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?