If a 20kg object is moved across the floor and the coefficient of friction is 0.255. What is the frictional force?

A meterstick is initially standing vertically on the floor. If the meterstick falls over, with what angular velocity will it hit the floor? Assume that the end in contact with the floor experiences no friction and slips freely.

In the mass-energy equivalence equation, what is the correct unit for E? A. J B. C C. kg D. m/s

In a simple electric circuit, a 110-volt electric heater draws 2.0 amperes of current. The resistance of the heater is

Which statement best describes frustration? A. When you achieve your goals despite certain events B. When you can't retrieve your gold because you are not trying hard C. When you can't achieve your goal due to events beyond your control D.

Work is the transfer of power from one object to another.

Light travels at 150000000km from the sun to earth in 8 minutes. What speed is this in Km/s

Electricity problem (coulomb's law)

An observer (O) spots a plane (P) taking off from a local airport and flying at a 29° angle horizontal to her line of sight and located directly above a tower (T). The observer also notices a bird (B) circling directly above her.

In order for convection to occur, you must have

Explain Newton's First Law for the following. If you walk across the room holding a ball, when should you drop it to ensure that it lands on a target? Before, after or when you are directly on the target?