An object with a mass of 78 kilograms is lifted through a height of 6 meters. how much work is done? a. 468j b. 4586.4 j c. 764.4 j d. 47.75 j

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 .

What would be the radius of the earth if it had its actual mass but had the density of nuclei? express your answer to two significant figures and include the appropriate units.

Use vsepr theory to predict the molecular geometry of the molecule hcn.