Do sound waves must have a medium to travel but elctromagnetic waves cannot

As you drive away from a radio transmitter, the radio signal you receive from the station is shifted to longer wavelengths. True / False.

A light-year is a measure of the astronomical distance that light traverses in a vacuum in 1 year. (a) how many kilometers does light traverse in 1 ly?

What happens to kinetic energy when the speed doubles

What happens to resistance and current when more loads are added to a parallel circuit? A - Resistance decreases and current increases. B - Resistance and current are unaffected. C-Resistance increases and current increases.

When a ceiling fan rotating with an angular speed of 2.20 rad/s is turned off, a frictional torque of 0.225 n · m slows it to a stop in 25.5 s. what is the moment of inertia of the fan?

What will happen to the hydronium ion concentration and pH of the water if hydrochloric acid is added to water?

What is the main driver of the water cycle

What two types of evidence are used to classify orgianisms?

What is the name of the fine soil particles deposited by rivers?

A ball of mass 200 g rolls along the ground at a speed of 5.2m/s. calculate the kinetic energy of the ball. Give answer to one decimal place.