The efficiency of a machine is always less than 100% because

A 6 kilogram cat is resting on top of a bookshelf that is 1 meters high. What is the cat's gravitational potential energy relative to the floor?

4. Can 200 ml of fluid be transferred to a 1-quart container? Explain the process that you used to arrive at your answer.

What are moles in chemistry?

Discuss how resistance affects current in a circuit.

Butene has two isomers one with methyl groups on the same side of the double bond and the other with methyl groups on the opposite side. What kind of isomers are these?

A cube has a depth of 10 cm. What is the volume of the cube? Or What is depth?

A sample of NO2 in a 1550 mL metal cylinder at 70.26 kPa has its temperature changed from 480oC to - 237oC while its volume is simultaneously changed by a piston to 5114 mL. What is the final pressure in kPa?

How many grams of methane gas (CH4) are in a 15.8-liter sample at 1.2 atmospheres and 27°C? Show all work used to solve this problem

Oxygen forms a number of compounds with sulfur, many of which are quite reactive. One such compound is 57.20 % by mass S. Calculate the number of grams of oxygen present in a sample of this compound that contains 50.00 grams of S.

What is meant by "pressure of the atmosphere?" What causes this pressure?