Fifteen joules of heat are added to a cylinder with a piston. The system uses 7 joules of energy to raise the piston upward. By how much did the internal energy of the system increase?

Which two elements will most likely form an ionic bond? (Click on the periodic table icon to view these elements) -krypton and lithium -magnesium and silicon -calcium and potassium -iodine and chlorine

What do these compounds have in common H2O cl2 NH3

What is the universe made of? Astronomers face an embarrassing conundrum: they don't know what 95% of the universe is made of

A disk with a hole has inner radius rin and outer radius rout. the disk is uniformly charged with total charge q. find an expression for the on-axis electric potential at distance z from the center of the disk

The system shown is at rest when a constant 150-n force is applied to collar b. neglect friction. (a) if the force acts through the entire motion, determine the speed of collar b as it strikes the support at c.

If q1 is 2μC, q2 is 5μC and r1 = 0.2m, then the force between the charges is

On a weather map places that have the same temperature are joined with lines called

Which of the following generally speed up a reaction? A. increasing the activation energy B. removing any catalysts C. adding more heat D. shaking the container holding the reaction

Cual es el peso de 5L de un fluido que tiene una densidad 3.5 veces mayor que la del agua?

A flask containing neon gas is connected to an open-ended mercury manometer. The open end is exposed to the atmosphere, where the prevailing pressure is 745 torr. The mercury level in the open arm is 50.