A car engine supplies 2.0 × 10^3 joules of energy during the 10 seconds it takes to accelerate the car along a horizontal surface. What is the average power developed by the car engine while it is accelerating?

The discovery that the universe appears to be expanding led to a widely accepted theory called a.) the big bang theory b.) the doppler effect c.) hubble’s law d.) solar nebular theory e.) the seyfert theory

Awhite-blue star is hotter than a red star. select the best answer from the choices provided true or false

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?