A wave that can travel only through what is a mechanical wave

The hammering on a train track is often heard twice by workers farther down the track; first as the sound travels through the steel and second as the sound travels through the air. Which graph is true

As the distance between a satellite in a circular orbit and the central object increases, the period of the satellite. A. increases B. decreases C. continuously fluctuates D. stays the same

Kepler's third law can be used to compare the moon's orbit around the earth to the orbit of the earth around the sun.

Which are advantages of renewable resources? Check all that apply. Renewable energy supplies are completely reliable everywhere. Some renewable resources will never be used up. Little or no waste is produced by renewable resource plants.

What two factors affect an objects momentum?

You are operating a boat with a power ventilation system. you have just fueled this boat. how long should you let the ventilation system run before starting the engine?

The force on a current-carrying wire is a maximum when the current is moving parallel to a magnetic field. true or false

In 1999, what percentage of 36-month-old toddlers had been toilet trained? 20 percent 40 percent 60 percent 80 percent

Tarzan, in one tree, sights jane in another tree. he grabs the end of a vine with length 20 m that makes an angle of 45â with the vertical, steps off his tree limb, and swings down and then up to jane’s open arms.

Applying the Law of Conservation of Momentum Train car A is at rest when it is hit by train car B. The two cars, which have the same mass, are stuck together and move off after the collision.