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.

How do I find deceleration

A 700-kg car, driving at 29 m/s, hits a brick wall and rebounds with a speed of 4.5 m/s. What is the car's change in momentum due to this collision? A. 2.3x 10^4 kg·m/s towards the wall B. 2.3x 10^4 kg·m/s away from the wall C. 1.

How many hertz vibrations are in a tuning fork for the musical letter f?

This problem has been solved! See the answer A kayaker paddles with a power output of 60.0 W to maintain a steady speed of 1.40 m/s a.) Calculate the resistive force exerted by the water on the kayak. b.

The formula below gives V, the velocity in feet per second of a falling object t seconds after it has been dropped. V (t) = 32t If a piano is dropped off a cliff, how fast will it be falling after 4 seconds? A. 64 feet per second B.

Ethan pushes a wooden box across a carpet floor then he pushes the same box across a smooth marble floor why does Ethan find it easier to push the box on the marble floor than carpet floor

Let's now apply our equations for the normal modes of open and closed pipes. On a day when the speed of sound is 345 m/s, the fundamental frequency of an open organ pipe is 690 Hz.

Suppose you are an observer standing on the Moon, looking back at Earth. If the moon is in the waxingquarter phase, what phase of the Earth would you see? A. waxing quarter B. full C. new D. waning quarter E. none; the Earth doesn't have phases

How many chromosomes will an elephant's sperm have?

Would the springs inside a bathroom scale be more compressed or less compressed if you weighed yourself in an elevator that was moving upward at constant velocity