Why might the cost of fossil fuels become more expensive in the future?

What is the PE of an object with a mass of 10 kg, and 2 meters up

A toy rocket, launched from the ground, rises vertically with an acceleration of 20 m/s2 for 6.0 s until its motor stops. Disregarding any air resistance, what maximum height above the ground will the rocket achieve?

A 1.34 kg ball is connected by means of two massless strings, each of length L = 1.70m, to a vertical, rotating rod. The strings are tied to the rod with separation d=1.70 m and are taut. The tension in the upper string is 35 N.

A woman stands in a boat at rest on a calm lake. She throws a 10 kg anchor off the front of the boat, which has a mass of 1,000 kg. What is the initial momentum of the anchor-boat system? A) 1,000 kg m/s B) zero because both objects are at rest.

What are possible units of speed or velocity? A. km/hr B. sec/m C. kg/sec D. m/sec2

Calculate the kinetic energy of a 100.0-kg meteor approaching the Earth at a speed of 10.0 km/s. Remember that 1 km = 1000 m.

How many electrons in a hydrogen atom?

What branch of Science studies matter and energy and the way they work together with force to cause motion

The suspension cable of a 1,000 kg elevator snaps, sending the elevator moving downward through its shaft. The emergency brakes of the elevator stop the elevator shortly before it reaches the bottom of the shaft.

Which of the following expressions for power or dimensionally correct?