4. Calculate the total energy required to take ice from -25 degrees Celsius to 140
degrees Celsius. You must show the heating curvelgraph.

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

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