Which force opposes motion between two surfaces in direct contact?

Energy transformations that involve one transformation from one type of energy to another are called transformations.

Compare the maximum rate of heat transfer to the basal metabolic rate by converting a bmr of 88 kcal/hr into watts. what is the value? from this comparison you should see why the body can accommodate a modes amount of activity in hot weather but strenuous activity would increase the metabolic rate above the body's ability to remove heat [12].

How long will it take a car traveling of a constant speed of 45m/s to cover the distance of a 2.5km?