A 165-kg granite rock (rho = 2700 kg/m3) is dropped into a lake. A man dives in and tries to lift the rock. Determine how much force the man needs to apply to lift it from the bottom of the lake? Take the density of water to be 1000 kg/m3.

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse

The substances that are necessary for producing of certain hormones and that store and transport vitamins

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.