Fuel cells are devices that

A. directly convert hydrogen to electricity.

B. store solar energy.

C. spin turbines.

an blank Used to determine the change of an object

What are some examples of wave refractions?

A bike accelerates uniformly from rest to a speed of 7.10 m/s over a distance of 35.4m. determine the acceleration of the bike.

What do you think the future of the UK's energy resources should be?

The slope of the line on distanc-time graph is A. Distance B. Time C. Speed D. Displacement

A ray in benzene has a critical angle of 41.8 deg when trying to enter air. What is the index of refraction for benzene?

An elevator has mass 600 kg, not including passengers. the elevator is designed to ascend, at constant speed, a vertical distance of 20.0 m (five floors) in 16.0 s, and it is driven by a motor that can provide up to 40 hp to the elevator.

When two objects collide and stick together, what will happen to their speed, assuming momentum is conserved? They will move at the same velocity as whichever object was fastest initially.

Which planet shows evidence of water erosion?

What do nuclear fission and nuclear fusion have in common?