Which collects light in a reflecting telescope?

a. concave lens

b. concave mirrors

c. convex lens

d. convex mirror

explain how climatic shifts that are naturally occuring and not the result of some castrophic events like asteroid impact happen?

A battery is the power source for what type of current? AC BC DC all types of current

Is is false or true The closer objects are, the stronger the gravitational force between them.

Lakes and ponds which have limestones or calcium carbonate are affected less by acid rain than those which have granite. This is because ... A) granite solutions are basic and neutralize the acid rain.

What process causes an object to permanently change its shape?

What trends were seen in Mendeleev's periodic table?

Through which medium would EM waves travel the fastest? A. The Ocean B. The Atmosphere C. Rocks

Average mass of a toy car (small, hot wheels) ?

A cannon directed straight upward launches a ball with an initial speed v. The ball reaches a maximum height h in a time t. Then, the same cannon is used to launch a second ball straight upward at a speed 2v.

Does the sun fuse hydrogen into helium or vice versa?