An air pistol contains compressed air in a small cylinder. assume that the volume is 1 cm3, pressure is 1mpa, and the temperature is 27°c when armed. a pellet, m = 2g, acts as a piston, initially held by a pin (trigger); when released, the air expands in an isothermal process (t = constant). if the air pressure is 0.1 mpa in the cylinder as the bullet leaves the gun, find a. the final volume and the mass of air. b. the work done by the air and work done on the atmosphere (the bullet pushes the atmospheric

Uranium has two naturally occurring isotopes. 238u has a natural abundance of 99.3% and 235u has an abundance of 0.7%. it is the rarer 235u that is needed for nuclear reactors. the isotopes are separated by forming uranium hexafluoride uf6, which is a gas, then allowing it to diffuse through a series of porous membranes. 235uf6 has a slightly larger rms speed than 238uf6 and diffuses slightly faster. many repetitions of this procedure gradually separate the two isotopes. what is the ratio of the rms speed of 235uf6 to that of 238uf6? express your answer to five significant figures.

In which of these cases are the two wave points considered to be in phase with each other?

The star nearest to our sun is proxima centauri, at a distance of 4.3 light-years from the sun. how far away, in km, is proxima centauri from the sun?