Assignment: Reflect on the Lab Active Analyzing the Relationship between Speed and KE Read through the scenarios below and calculate the predicted change in kinetic energy of the object compared to a 50 kg ball traveling at 10 m/s. A 50 kg ball traveling at 20 m/s would have kinetic energy. A 50 kg ball traveling at 5 m/s would have kinetic energy. A 50 kg person falling at 10 m/s would have kinetic energy.

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.