Select an incorrect statement relating to a carnot cycle operating on a gas. a) each process is a reversible process. b) work occurs for all four processes. c) there are two adiabatic processes. d) there are two constant-pressure processes.

B)

D)

Explanation:

Carnot cycle ;

  This is the ideal cycle for all type of heat engine.All the process in the Carnot cycle is reversible processes ( those process does not leave any effect on the system as well as surrounding when the process is  reversed  is known as reversible process).It have four process in which two process is constant temperature and other two is isentropic or we can say that reversible adiabatic.

In the two process(constant temperature) only heat interaction take places and other two process(adiabatic) only work interaction take places.

So the option B and D is incorrect for Carnot cycle.

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.