A wave is traveling at a speed of 120 m/s and its wavelength is 4 m. Calculate the wave’s frequency and period. HELP PLS

State the right hand rule of the direction of magnetic field in a conductor carrying current

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly