The planet Gallifrey has 2 times the gravitational field strength and 2 times the radius of the Earth. How does the mass of the planet Gallifrey compare with the mass of Earth?

Moon effect. some people believe that the moon controls their activities. if the moon moves from being directly on the opposite side of earth from you to being directly overhead, by what percentage does (a) the moon's gravitational pull on you increase and (b) your weight (as measured on a scale) decrease? assume that the earth–moon (center-to-center) distance is 3.82 × 10^8 m, earth's radius is 6.37 × 10^6 m, moon's mass is 7.36 × 10^22 kg, and earth's mass is 5.98 × 10^24 kg.

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?