Which of the following is the best definition of acceleration?

A rock, thrown straight up, takes 4.2 seconds to reach its max height (g=9.8m/s) what was the initial velocity? what was its maximum height?

A carousel revolves around 9.4 times in 8.5 minutes. What is the frequency of the carousel in hertz?

Which scenario could produce this motion map? Theo throws a tennis ball against a wall and it bounces off. Pilar is walking to her car, stops to check for her keys, and tums around to get them from her house.

How would you describe the magnetic field produced by a current in a straight wire? A. the lines of force run parallel to the wire B. the lines of force run perpendicular to the wire C. the lines of force run circles around the wire

A noisy toy is placed in a glass jar. All the air is then slowly removed from the jar. How does this affect the sound you hear? The sound of the toy increases until it reaches its maximum. The sound of the toy decreases and then stops.

Name the elements from which nichrome can be made.

The power output of a typical large power plant is 1000 megawatts (MW). Express this result in W, kW, and GW

During an experiment, a toy car accelerates forward for a total time of 5s. Which procedures could a student use to determine the average net force exerted on the car during the 5s that the car accelerates?

What is the law of conversation of energy?

When a surface vibrates, air is forced to move, creating a sound wave. What kind of force is exerted by the moving surface on the air?