A student runs 10.0 km east along the course, then turns around and runs 10.0 km west along the same path. The student returns to the starting point in 50 min.
a) What is the student's average speed?
b) The student's average velocity?

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c. the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?