We have a heat engine that produces 150 J of heat, does 40 J of work, and emits 110 J into another system. What is the efficiency of the heat engine? (show you work)

An electron in an atom has an uncertainty of 0.2 nm. If it is doubled to 0.4 nm by what factor does the uncertainty in momentum change?

Charges The glass is attracting the pieces of paper. What does this tell you about the charges on the glass and the paper The glass and the paper have the same charge.

Two particles, with identical positive charges and a separation of 3.41 * 10-2 m, are released from rest. Immediately after the release, particle 1 has an acceleration a1 whose magnitude is 3.

A trunk is dragged 3.0 meters across an attic floor by a force of 2.0 N. How much positive work is done on the trunk?

The mass number is determined by which particles

Potential energy and kinetic energy are created when work is done to change a position (PE) or a state of motion (KE). Ignoring friction, how does the amount of work done to make the change compare to the amount of PE or KE created? a.

The wavelength of a wave is the wavelength of a wave is how strong the wave is. equal to the speed of the wave times the wave's frequency. the distance between where the wave is emitted and where it is absorbed.

What is a carbon whip?

2 A scientific theory is

Explain the roles of Earth's own energy sources and solar energy in the rock cycle