calculate the buoyant force due to the surrounding air on a man weighing 800 n . assume his average density is the same as that of water. suppose that the density of air is 1.20 kg/m3.

Aturntable that spins at a constant 74.0 rpm takes 3.10 s to reach this angular speed after it is turned on. find its angular acceleration (in rad/s2), assuming it to be constant, and the number of degrees it turns through while speeding up.