Joey drives his Skidoo 7 kilometers north. He stops for lunch and then drives 5 kilometers east. what's the distance did he cover? what's was his displacement?

More solar radiation is absorbed by earth’s surface than by

An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?

Chi walked 100 meters in 5 minutes. she took another 15 minutes to walk another 400 meters to reach her house. what is her average speed?