Why is the amount of mechanical energy produced less than the amount of electrical energy used?

A wave has a wavelength of 4 m and a frequency of 85 Hz. What is the speed of this wave?

A star is 10 light years away from the earth. suppose it brightens up suddenly today, after how long can we see this change?

Constant speed is the same thing as average speed

In which space, outdoors or in your classroom, would it be easier to hear a musician? Explain

Where are truss bridges located?

You are drawing a branching diagram to show the relationship between Turtles frogs and alligators which two organisms does the diagram indicateas having the most recent common ancestor

Estimate the length of the neptunian year using the fact that the earth is 1.50Ã108km from the sun on average.

Identify one type of electromagnetic energy that has a shorter wave length than green light

Any object with mass exerts a force on any other object with mass. This force is called?

Is a light bulb considered construction