Consider a room that is initially at the outdoor temperature of 20°c. the room contains a 40-w light bulb, a 110-w tv set, a 300-w refrigerator, and a 1110-w iron. assuming no heat transfer through the walls, determine the rate of increase of the energy content of the room when all of these electric devices are on.

1560 W

Explanation:

All we need to do here just balance the energy using energy conservation.

that is

Since no energy is leaving out = 0

and  

⇒ = 40+110+300+1110= 1560W

therefore the rate of increase of energy content of the room = 1560W

when all the decives were on

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle