Consider an evacuated rigid bottle of volume v that is surrounded by the atmosphere at pressure p0 and temperature t0. a valve at the neck of the bottle is now opened and the atmospheric air is allowed to flow into the bottle. the air trapped in the bottle eventually reaches thermal equilibrium with the atmosphere as a result of heat transfer through the wall of the bottle. the valve remains open during the process so that the trapped air also reaches mechanical equilibrium with the atmosphere. determine the net heat transfer through the wall of the bottle during this filling process in terms of the properties of the system and the surrounding atmosphere.

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

Ithink it’s cancer risk

The correct answer should be b let me know if i’m wrong