Conventional current is the rate at which positive charge flows in a circuit. In atoms, only the electrons are free to move. What can you conclude from these statements?

A) Electrons must be positively charged.
B) The definition of current must be changed.
C) Electrons do not flow in electric circuits.
D) Charges actually flow opposite the conventional current.

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?

Calculate the volume of this regular solid. what is the volume of the cone? round your answer to the nearest hundredth

Which system of units is used by only a small number of countries in the world, including the u.s.