17. two freight cars, each with a mass of 3.0x105 kg.
collide and stick together. one was initially moving
at 2.2 m/s, and the other was at rest. what is their
final speed? define the system as the two cars.

The pressure, volume, and temperature of a mole of an ideal gas are related by the equation pv = 8.31t, where p is measured in kilopascals, v in liters, and t in kelvins. use differentials to find the approximate change in the pressure if the volume increases from 14 l to 14.6 l and the temperature decreases from 375 k to 370 k. (round the answer to two decimal places.)

The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface

In the first law of thermodynamics, triangle e=q-w, what does q stand for