A76-kg ball is tied to one end of a massless string of length 1.3 m. the other end of the string is tied to a nail in the center of a table. the ball is set into uniform circular motion around the nail, and the tension in the string is 51 n. how long does the ball take to make one complete revolution? assume friction with the table is negligible.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

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.

If anyonee has done the momentum lab practical in physics can you give me the answers i am s lostt rnn : (