Author Question: If electricity costs 6.00/kWh (kilowatt-hour), how much would it cost you to run a 120 W stereo ... (Read 70 times)

magmichele12 · **on:** Jul 29, 2018

If electricity costs 6.00/kWh (kilowatt-hour), how much would it cost you to run a 120 W stereo system 4.0 hours per day for 4.0 weeks?

A) 0.81
B) 0.12
C) 1.38
D) 2.27

Question 2

An object of mass m rests on a flat table. The earth pulls on this object, exerting a force of magnitude mg. What is the Newton's third law pair force to this pull?

A) The table pushing up on the object exerting the force mg.
B) The object pushing down on the table exerting the force mg.
C) The table pushing down on the floor exerting the force mg.
D) The object pulling upward on the Earth exerting the force mg.
E) The table pulling upward on the Earth exerting the force mg.