The fusion reaction 2h + 2h --> 3he + n releases energy 3.27 mev per decay. how long could the fusion of 1.0 kg of this hydrogen isotope by this reaction keep a 100 w lamp burning?

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?

Ajoint produces movement when its angle decreases. which type of movement is it?

Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?