The equation to calculate momentum is ?

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

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.

An object is kept at 45 m high and how much time will it take to reach the ground