Q-For a lever of 0.5 m length with a pivot in the centre, an object weighs 5N is seated 0.25 m left side of the pivot. a-How far must the other 10N object be seated from the right side of the pivot in order to balance the lever.
b-Draw the lever.

Suppose while hauling rocks, you accidentally drop one. it breaks apart in flat, planar sections. what type of rock did you just drop? 20 points

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)

Why should the wavelength scale of spectroscope be calibrated