A50.0 gram sample of a metal initially at a temperature of 200 degrees celsius is immersed in 400 gram of water at 20 degrees celsius. find the specific heat of the metal in j/kg degrees celsius, if the equilibrium temperature is 23 degrees celsius. (specific heat of water is 4186 j/kg degrees celsius)

What is the frequency of a light wave with a wavelength of 620nm

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

How many times did thomas edison mess up the light bulb