HELP At a school dance on Mars, aliens Jack and Jill are at the opposite sides of the gym which is 50m long. Jack has a mass of 70kg and Jill has a mass of 60kg. What is the magnitude of force between Jack and Jill?

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.

The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (c3h8) to burn it completely. for every gram of propane that flows through the burner, what volume of air is needed to burn it completely? assume that the temperature of the burner is 195.0°c, the pressure is 1.05 atm, and the mole fraction of o2 in air is 0.210.

How to know which equation of motion to use where?explain