How much energy (in joules) is released when 0.06 kg of mercury is condensed to a liquid at the same temperature?

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?

Which explanation most accurately describes convection within the ocean

What is the volume of 2400kg of gasoline (petrol) if the density of petrol is 0.7g/km3