Fuel cells are devices that

A. directly convert hydrogen to electricity.

B. store solar energy.

C. spin turbines.

The angle between a flashlight beam that strikes a mirror and the reflected beam is 80 degrees. What is the angle of incidence?

A hockey player uses a leaf blower to apply a constant force on a hockey puck. The puck accelerates in a straight line across the ice. Then another player applies an equally strong, constant force on the puck in the opposite direction.

Where are earthquakes most likely to occur? A. Divergent Plate Boundaries B. Hot Spots C. Convergent Plate Boundaries D. Within oceanic plates

Suppose a train car moving down a track at 10 m/s collides with another train car that is moving. Explain how momentum is conserved after the collision.

What kind of chemical bond is formed when electrons are transferred from atom to atom

A flashlight beam strikes the surface of a pane of glass (n = 1.50) at a 61° angle to the normal. what is the angle of refraction?

Why is there controversy to the opinion that human contribution of carbon dioxide to the atmosphere is cause warming

If the resistance of a circuit increases, that means that the current has to

One watt is equal to which of these values? 1 joule/hour 1 joule-hour 1 joule/second 1 joule-second

What are some of the benefits of learned optimism that have been found in research? O A. Fewer health problems O O B. All of these C. Making more money O D. A lower divorce rate