A wave traveling at 230 m/sec has a wavelength of 2.1 meters. What is the frequency of this wave?

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island