The theory of plate tectonics suggests that about 200 million years ago, all of Earth's land was confined to a single continent called

A. Laurasia.

B. Eurasia.

C. Gondwanaland.

D. Pangaea

Why is it important that all scientists use the metric system?.

Which description includes a vector quantity? A The car is moving at 70 miles/hr. B The car's velocity changes at 9.8 m/s2. C The plane is flying at 850 miles/hr. D The box moved left 20 meters.

A 20-N falling object encounters 4 N of air resistance. The magnitude of the net force on the object is?

What field of study did bohr inspire

Are the objects described here in static equilibrium, dynamic equilibrium, or not in equilibrium at all? a. A girder is lifted at constant speed by a crane. b. A girder is lowered by a crane. It is slowing down. c.

About how much energy is transferred between a producer and primary consumer? A. 90% of the original energy from the Sun is transferred B. 10% of the original energy from the Sun is transferred C. 10% of the plant's energy is transferred D. 0.

If you exert a force of 500 n to walk 4 m up a flight of stairs in 4 s, how much power do you use?

The concepts of a "particle" and a "wave"

If a particle undergoes shm with amplitude 0.10 m, what is the total distance it travels in one period?

If the length of one side of a square is 12.0 m, what is the perimeter of the square?