A 180 cm length of string has a mass of 5.0 g. it is stretched with a tension of 8.6 n between fixed supports. (a) what is the wave speed for this string

How can you know when an object has unbalanced force on it

Why is it important to be able to trace the pole connection on a meter back to the same type of pole at the electrical source?

Is matter a pure substance or mixture

Who was the first to study the heavens through a telescope?

The lightning bolt discharge lasts one millisecond. What is the average current flowing from the cloud to ground? Answer in units of A.

The sources of the heat inside Earth

A microwave is rated at 750 watts. How long will it take the microwave to do 5700 J of work on a cup of water? Assume 100% efficiency. A) 0.13s B) 2s C) 7.6s D) 4,275,000 s

A block hangs at rest from the ceiling by a piece of rope. Consider the forces acting on the block. Is gravity present or absent?

A nurse counts 66 heartbeats in one minute. What is the period of the hearts oscillation? In minutes

A room is 16 ft x 12 ft x 12 ft. would air enter or leave the room if the temperature changed from 27°c to - 3°c while the pressure remained constant? Determine the volume of the air which moved in or out of the room.