At a certain location the earth's magnetic field is 0.00004t at an angle 40 degrees to vertical, a vertical wire carries a certain current of 15a . find the force on 20m of the wire

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)

Positive ions differ from neutral atoms in that