Apower plant burns 900kg of coal per hour and produces 480kw of power. if each kg of coal releases 5,9mj, determine the efficiency of the plant
b)air enters the nozzles at 3,0 bar, 1270c and 30m/s. during its passages a heat loss of 4,40kj/kg and the fluid leaves at 2,0 bar and 270m/s. the heat loss to environment ioccurs at 270c. calculate the final temperature, the entropy change of air and the total entropy change of the overall process, is the process reversible, irrevessible or impossible?

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min