A baseball pitcher throws a ball weighing 0.150 kg. With a horizontal force of 28.7 N for a distance of 2.42 meters. ( For the simplicity of the equation the force is a constant). How fast is the ball moving when it leaves the pitcher's hand? Mass
Force
Distance

The ball flies 18.44 meters to reach the batter. Assuming the ball moves at a constant speed. How much time does it take the ball to reach the batter.

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)