An airplane has a mass of 190839 kg and carries 395 passengers having an average mass of 63 kg each. What is the total energy of the loaded airplane (in MJ) when traveling at 772 km/hr at a height of 9246 m above the sea level?

what is the kinetic energy of a car with the mass of 1,736 kg if its traveling at 7.26 m/s? answer in exponential form.

Two different masses are sitting on a frictionless track with a compressed spring between them which has 4.0 J of potential energy. When released, the spring pushes the masses apart. If one mass is 2.0 kg and the other mass is 5.0 kg, what is the speed of each mass after the spring stops pushing them apart? Assume the mass of the spring is negligible.

Suppose that in one year a country produces 2.77 × 10'' kilowatt-hours (kWh) of electrical energy from 4148 hydroelectric plants (1.00 kWh = 3.60 × 10° J). On average, each plant is 90.0% efficient at converting mechanical energy to electrical energy, and the average dam height is 50.0 m. At 2.77 x 10!1 kWh of electrical energy produced in one year, what is the average power output Payg per Pavg W %3D hydroelectric plant? What total mass of water m flowed over the dams during that year? m = kg What was the average mass of water mavg per dam that provided the mechanical energy to generate the electricity? mavg kg What was the average volume of water Vavg per dam that provided the mechanical energy to generate the electricity? (The density of water is 1000 kg/m³.) Vavg m %3D A gallon of gasoline contains 4.50 × 10' J of energy. How many gallons n of gasoline did the 4148 dams save? n = gal MacRook Pro