Study the graph shown. it is a graphic of a car trip taken by karen and her mother. the starting position (0, 0) is their home. calculate the average speed of the car during the first hour of the trip.

average speed = (distance covered) / (time to cover the distance)

The position at the end of the first hour is the first little circle on the graph after the beginning point at (0, 0).

It's at the point (1 hour, 40 miles) .

So the average speed for the first hour is (40 miles) / (1 hour)

Speed = 40 mph.

specific latent heat of fusion, lf, of a substance is defined as the amount of heat required to change a unit mass of the substance from solid to liquid state, without any change in the temperature.

explanation: