A50g mass of metal (c = 0.20 cal/goc) at 90°c is dropped into water at 30°c and the temperatures stabilize at 40oc. calculate the mass of water used.

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An electric current in a wire will push or pull on a permanent magnet. which statement best explains how an electric current creates an electromagnetic force on another magnet?

Infrared rays have a shorter wavelength than question 11 options: x-rays. ultraviolet rays. radio waves. gamma rays.