A roller coaster car rapidly picks up speed as it rolls down a slope. as it starts down the slope, its speed is 4 m/s. But 3 seconds later, its speed is 22m/s. what is its average acceleration?

The tallest tree in the city is 40 feet tall. The shortest tree in the city is 4 feet tall. If the tallest tree in the model is 10 feet tall, how tall is the shortest tree in the model

When electromagnetic fields interact with charged particles,

23. Imagine a ball on a track where no energy is transferred between the ball and the track or between the ball and the air around it. The ball starts from rest at the position labeled B and moves along the track toward Positions D, E, F, and G.

A wave is propagating from left to right in a medium. The particles in the medium are also vibrating from left to right. What kind of wave does this describe? longitudinal wave transverse wave mechanical wave electromagnetic wave

A stunt car with a mass of 1000 kg crashes into a tree on a movie set during the collision acceleration of the car with 3 m what was the force of impact of the collision on the car

Acceleration is a vector quantity. O O A. True B. False

What will happen to the brightness of a string of bulbs hooked up in series when you increase the number of bulbs in the string? A. Each light in the string will get brighter. B. Each light in the string will get dimmer. C.

What are the two factors that influence the composition of beach material

Which of the following indicates that a ChemicL change has taken place? (A) a change from liquid to a gas (B) an increase in the volume of a substance (C) a change in the color of a substance (D) a change from a solid to a liquid A precipitate is a

Which of these circuit schematics has an ammeter?