Electrical wires sometimes have a plastic coating wrapped around them. How does this make the wires safer to handle? f. Plastic will melt if the wires overheat
g. Plastic is a good insulator.
h. Plastic is smooth and not easily frayed.
j. Plastic does not react chemically with air.

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.

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?

Which word expression describes how much to calculate pressure