A70kg runner starts by walking 2.5m/s[w] and begins to speed over a 45s period to 15m/s. calculate the net force acting on the runner.

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

What part of the ear is names after tools, such as the hammer and the anvil?

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?