The graph below shows the position of a runner at different times during a run. Use the graph to determine the runner's displacement and average velocity for t = 20.0 min to t = 30.0 min.

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.

You can melt ice by applying pressure because the solid/liquid line has a slope.