An EM wave has a frequency 3x10-15 Hz,
If the speed of the wave is 3x10^8, whats the wavelength
A. 1m
B. 1 X 10^-7 m
C. 9 X 10^23 m
D. 9 x10^2 m

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

How can you increase the strength of an electromagnet?