A book weighing 3 N is lifted 2 meters. How much work was done?

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Which of the following are appropriate acceleration units?