A silver wire 2.6 mm in diameter transfers a charge of 420C in 80 minutes. Silvercontains 5.8 x 10 28 electrons per cubic meter. a) What is the current in the wire?b) What is the magnitude of the drift velocity of the electrons in the wire?

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?