A 2100 kg demolition ball swings at the end of a 15 m cable. At the lowest point of the swing. The ball is moving at 7.6 m/s. Determine the tension in the cable.

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?

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 .