What temperature is required to transfer waste heat to the environment for a heat engine to be 100 percent efficient? a) 0°c b) 0 k c) 273 k d) 212°f

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?