A 1400kg car moving westward with a velocity of 15m/s collides with a utility pole and is brought to rest in 0.30sec. find the force exerted on the car during the collision.?

An equilibrium is not changed by a change in pressure. a. True b. False

What does earths hydrosphere include

What is true for the critical incident angle? A The incident angle is the angle for which the angle of refraction is 90°. B The incident angle goes from a low to a higher index of refraction.

Which of the following must be true about an object for it to be in uniform circular motion? A. It must have zero centripetal acceleration. B, It must have increasing centripetal acceleration. c. It must be moving at a constant speed. D.

How many phases are there in a plant's reproductive cycle? A. 1 B. 2 C. 3 D. 4

Through which type of material does sound tend to travel at the highest speed? A. Sound travels at the same speed in every material B. Solids D. Liquids

How does a low pressure system determine the weather in an area?

Molecules at room temperature move freely. What happens to the molecules when heat is removed until it freezes? Molecules group together Molecules slow down and contract Molecules speed up and expand Molecules move freely

A spring is used in a lab. It is vibrated at different frequencies and the wavelength is recorded. Using the graph of the data, what is the relationship found between frequency and wavelength? A) Frequency and wavelength are inversely related.

How do you describe the frequency of waves perceived by the observer from the moment the source appears to the moment it disappears?