Each pair of clay balls represents two planetesimals. If each planetesimal is composed of the same material and is separated by the same distance, which pair experiences the greatest gravitational attraction?.

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .

Could we see a galaxy that is 20 billion light-years away?

Abody covers a semicircle of radius 7cm in 5s .find its linear speed