1. If a 4000 kg rocket reaches 7,000 m/s in 8 minutes after blastoff, what is its acceleration? 2. What force is being applied to the rocket?

3. What is the rocket's potential energy when it is 12 km off the ground?
(Hint - Change kilometers to meters)

4. If the rocket were to fall from the 12 km height, what would be its speed right before hitting the ground? (assume no air resistance)

+ answer all the questions plz

Acar tire contains 0.0380 m^3 3 of air at a pressure of 2.20 ×10^{5} 5 n/m^2 2 (about 32 psi). how much more internal energy does this gas have than the same volume has at normal atmospheric pressure, 1.01x10^5 5 pa?

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?

The energy released by a nuclear fusion reaction is produced when