Please answer this question

A248-g piece of copper is dropped into 390 ml of water at 22.6 °c. the final temperature of the water was measured as 39.9 °c. calculate the initial temperature of the piece of copper. assume that all heat transfer occurs between the copper and the water. remember, the density of water is 1.0 g/m

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

Area around a charged object where the objects can exert a force on another charged objects is an electric