Aman pushes down on a lever with 45 n and the lever moves 1.5 meters. the other end of the lever lifts a 87.6 n box .4 meters. what is the efficiency of the lever?

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?