You push your little sister on a swing and in 1.1 minutes you make 54 pushes. what is the frequency of your swing? answer in units of hz.

Apossible explanation for a set of facts that can be tested by further investigation is called

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?