What will be the gravitational force between the bodies if the mass of each is doubled and the distance between them is halved?​

The density of a liquid could be found by using

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point