At a given instant in time, a 18-kg rock is observed to be falling with an acceleration of 7.75 m/s2. what is the magnitude and direction of the gravitational force on the rock?

More solar radiation is absorbed by earth’s surface than by

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.

Which levels of government establish and implement educational requirements for minors