Find the moment of inertia of a hoop (a thin-walled, hollow ring) with mass m and radius r about an axis perpendicular to the hoop's plane at an edge. express your answer in terms of the variables m and r.

Calculate the wavelength of the electromagnetic radiation whose frequency is 7.5 x 10^12 Hz

Ian walks 2 km to his best friend's house, then walks 0.5 km to the library. He then makes a 2.5 km walk home. The entire walk took him 3 hours. What is his average speed in km/h? SHOW YOUR WORK!

What best describes how energy changes form in a car's engine

A line or region of calm water where waves should be is explained by: refraction interference diffraction

How many aTom's are there in one mole of hygrogen

A ship captain uses a steering wheel called a helm to turn the rudder of a sailing ahip. Do you thjnk it would be easier for him to turn a large wheel or a small wheel? explain why you think so

Potential energy and kinetic energy are created when work is done to change a position (PE) or a state of motion (KE). Ignoring friction, how does the amount of work done to make the change compare to the amount of PE or KE created? a.

The wavelength of a wave is the wavelength of a wave is how strong the wave is. equal to the speed of the wave times the wave's frequency. the distance between where the wave is emitted and where it is absorbed.

What is a carbon whip?

2 A scientific theory is