Which of the following would NOT change the net force of a sled going downhill? A. Putting rocks in the pockets of the rider B. Telling the rider to relax C. adding a layer of ice to the hill D. Tying another sled to the first one​

The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

In which of the following is positive work done by a person on a suitcase