Explain how fossil records of the past are reliable sources of information about evolution of life on Earth.

If steam enters a turbine at 600K and is exhausted at 400K, calculate the efficiency of the engine.

3. A 250 g car is released from rest at the top of a frictionless incline, 5 m above the ground.

What is the relationship between the magnetic field density and the distance from the surface of a magnet halfway between the poles?

Which statements are examples of observations a scientist would make a classify rock? 1. a rock is larger than other rocks 2. a rock feels smooth to touch 3. a rock is formed from molten lava 4. a rock is made of different minerals 5.

The amount of matter contained in a given volume for a substance is called

Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N

4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the helicopter?

Unless otherwise posted, what is the speed limit in a school zone? florida

If you put in 10 J of work to push 1 c of charge against and electric field what will be its voltage with respect to its starting position? when released, what will be it's kinetic energy if it flies past it's starting position?

The process of changing the energy of a system by means of force. Force * Diatance