A 250 Kg cast iron car engine contains water as a coolant. Suppose the engines temperature is 35°C when it is shut off. The air temperature is 10°C. The heat given off
by the engine and water in it as they cool to air temperature is 4.4x106 J. What mass of
water is used to cool the engine?

The slope of a velocity time graph over any interval of time gives the during that interval

(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

Why is the use of carbon-14 limited