Atemperature of 20 is equivalent to approximately

The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m2 . 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

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?

As the distance from a magnet increases, what happens to the magnet force?