how do i calculate the magnetic flux if a solenoid with a cross-sectional area 0.10m^2 and it is linked by a magnetic field of flux density of 2.0x10^-3 and has 250 turns?

An uplifted block of rock between two normal faults

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.