A75 n force pulls a child and a sled initially at rest down a snowy hill. if the combined mass of the child and sled is 55 kg, what is their speed after 7.5?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

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.

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)