A 0.5kg soccer ball is rolling across the soccer field as it slows down. It takes 8m for a frictional force of 3N to stop the soccer ball.

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

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.

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?