In science, all concepts are

a) opinions and facts.

B) beleifs that are familiar and complicated.

c) testable and observable.

D) theories that cannot be proven.

What is a bicyclists velocity if it took it 45 seconds to travel 202.5 meters to the left

Identify three different kinds of Physical change that could happen to a plastic spoon

Compare and contrast power and work.

A positive rod is placed to the left of sphere A, and the spheres are separated. Which best describes the spheres? Sphere A is negative and sphere B is positive because protons from sphere A are attracted to the rod and move to sphere B.

Suppose an extraction with methylene chloride (d = 1.33 g/mL), also called dichloromethane, is performed with the desired compound initially in brine (d = 1.04 g/mL). In a separatory funnel, which layer will be the organic layer?

A car's speedometer reads 20 m/s after accelerating, from a standing start, for 25s. What was the magnitude of its acceleration?

What happens to the period of a pendulum and the period of a spring as the amplitude of the oscillation increases? Briefly give an explanation for this relationship.

The element that is most abundant in earth is

Your car travels 600 miles in 6 hours. You stop the car for lunch for 1 hour and then you continue on your trip for another 14 miles and finish the entire trip in 8 hours. What was your car's average speed while you were driving?

Speed is a vector quantity