A160 w lightbulb is plugged into a standard 120 v outlet.
(a) how much does it cost in dollars per 31-day month to leave the light turned on continuously? assume electrical energy costs us$ 0.06/kw. h.
(b) what is the resistance of the bulb? (c) what is the current in the bulb?

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

What happens when the number of protons in an atom changes

Multiple choice. choose the one alternative that best completes the statement or answers the question. 1) if the force on an object is in the negative direction, the work it does on the object must be 1) a) negative. b) positive. c) the work could be either positive or negative, depending on the direction the object moves. 2) a truck has four times the mass of a car and is moving with twice the speed of the car. if kt and kc refer to the kinetic energies of truck and car respectively, it is correct to say that 2) a) kt = 16kc . b) kt = 1 2 kc. c) kt = kc . d) kt = 2kc . e) kt = 4kc . 3) you and your friend, who weighs the same as you, want to go to the top of the eiffel tower. your friend takes the elevator straight up. you decide to walk up the spiral stairway, taking longer to do so. compare the gravitational