A heat engine uses thermal energy flowing from a heat source that is 225 K to a cold sink that is 50 K.

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?