Planet A has a mass of 2.25 x 1020 kg, while planet B has a mass of 6.20 x 1018 kg. What is the gravitational attraction
between two planets if the distance between them is 435,500
km? Estimate G as 6.67 x 10-11 N (m/kg) ?

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes

The two required components for a generator

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.