A student initially 10.0 m East of his school walks 17.5 m West. The magnitude of the student's displacement, relative to the school is m? The direction of the student's displacement, relative to the school is ?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

(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