Hand washing is important especially in this time of pandemic

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.