(need to noww ). while bob is studying waves in science and he learns that the energy of a wave is directly proportional to the square of the waves amplitude. if the amplitude of a wave changes from 2m to 4m, what should he predict as the effect on energy of the wave? a) the energy is halved. b) the energy is doubled. c) the energy is quartered. d) the energy is quadrupled.

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?

In the first law of thermodynamics, triangle e=q-w, what does q stand for

The least penetrating form of radiation is