If 1.5 kilograms of water is to be heated from 20.0°C to 75°C to make a cup of tea, how much heat must be added? The specific heat of water is 4.18 J/kg°C. *

What is the rate of change in a objects position?

(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

In which of these cases are the two wave points considered to be in phase with each other?