Calculate the total heat content of 10 kg of Ice at -23°C. (Hint: A substance at absolute zero, -273° C, has O heat content.) Be mindful of significant figure rules for both multiplication and addition.
115 kcal
1400 kcal
1500 kcal
1300 kcal

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?

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

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