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)

A particle is confined to the x-axis between x = 0 and x = 1 nm. The potential energy U = 0 inside this region and U is infinite outside. What is the longest possible de Broglie wavelength for the particle? A. infinite B. 1 nm C. 2 nm D. zero E. 0.

What information about an element is most crucial for locating that element in the periodic table?

When the amount of a radioactive substance is reduced by 50%, what has occurred? a half-life beta radiation alpha radiation gamma radiation?

Why is it important to have a balanced centrifuge?

This diagram represents a top down view of an experiment on a table the 250g and 100g masses are falling and are pulling on the block draw an arrow

Calculate the kinetic energy of a truck that has a mass of 2900kg and is moving at 55m/s.

In the calorimetry experiment which energy will be calculated during the heat exchange if water is used?

A turtle, moving at a constant velocity of 0.9 m/s due south, is in a race with a rabbit, who runs at a moderate speed of 9 m/s.

What might cause a theory to change over time?

If a car accelerated from 5 m/s to 25 m/s in 10 seconds what is it's acceleration?