The velocity of a 975-kg car is changed from 12.0 m/s to 27.0 m/s by an external, constant force. What is the resulting change in momentum of the car?

What is the length x of the side of the triangle below? (hint: use the cosine function)

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

(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