A fixed 0.15 solid-disk pulley with a radius of 0.150 m is acted on by a net torque of 5.7 N. m. Calculate the angular acceleration of the pulley

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

Ineed the answer to question 1 , i’m desperate

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid