A heat engine with a high-temperature reservoir at 400 k has an efficiency of 0.20. what is the maximum possible temperature of the cold reservoir?

What to press when leaving laptop for a moment?

explain why when someone uses his thumb to push a pin into a block of wood the pressure on the wood is greater than the pressure on this thumb

What happens to the arrangement of water molecules as water melts and freezes?

An ionic compound is a compound that consists of molecules made of atoms that are covalently bonded. True or False?

If two waves with identical crests and troughs meet, what is happening? A. The wave is breaking. B. The wave is reflecting. C. Constructive interference is occurring. D. Destructive interference is occurring.

What is the speed of a 50 g rock if its de Broglie wavelength is 3.32 x 10?

The difference between newtons first law of motion and newtons third law of motion

A sound wave traveling at STP has a period of. 0023 seconds. The wavelength of this sound is closest to 1) 1.4E5 2) 6.9E-6 3) 0.76m 4) 76m

Static charge develops on a substance as it acquires or loses protons due to friction. a. True b. False

A milk truck carries milk with density 64.6 lb/ft3 in a horizontal cylindrical tank with diameter 12 ft. (a) Find the force exerted by the milk on one end of the tank when the tank is full. (Round your answer to the nearest integer.) lb