Physics: which action requires no work by a weightlifter? a.) lifting a weight from the floor to above his head b.) pushing a weight across the floor c.) setting the weight down on the floor d.) carrying a weight 1m across a level surface

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.

Estimate the change in the gibbs energy and molar gibbs energy of 1.0dm3 of octane when the pressure acting on it is increased from 1.0 atm to 100 atm. the mass density of octane is 0.703 g cm−3

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.