A 1.5 kg crate falls from a height of 2.0 m onto an industrial spring scale with a spring constant of 1.5 x 105 N/m. At its greatest compression the reading on the scale is:

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.

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =