A solid of density 8000 kgm.. weighs 0.8 kgf in air. When it is completely submerged in a liquid of density 5000 kgm - 3 ', the weight appears to decrease.
What is the apparent weight of the solid in the liquid?

Write short note on the following ; collision theory, rotation angle and angular velocity, centripetal acceleration, coriolis force, and newton's law of gravitation.

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference

Explain earth's motion, using the terms "precession" and "rotation" in your answer.