Ageneral equation for a steady, two-dimensional velocity field that is linear in both spatial directions (x and y) is v→=(u, v)=(u+a1x+b1y)i→+(v+a2x+b2y)j→ where u and v and the coefficients are constants. their dimensions are assumed to be appropriately defined. choose the correct x- and y-components of the acceleration field. (check all that apply.) ax=(u+a1x+b1y)a1+(v+a2x+b2y)b1

ay=(u+a1x+b1y)a2−(v+a2x+b2y)b2

ay=(u+a1x+b1y)a2+(v+a2x+b2y)b2

ay=(u+a1x−b1y)a2+(v+a2x−b2y)b2

ax=(u+a1x+b1y)a1−(v+a2x+b2y)b1

ax=(u−a1x+b1y)a1+(v−a2x+b2y)b1

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?

1kg of water contained in a piston-cylinder assembly undergoes two processes in series from an initial state where the pressure is 3.0 bar and the temperature is 150°c process 1-2: the water is compressed isothermally to a volume of 0.25 m^3 with 120 kj of work being done to the system. process 2-3: the water is heated at constant volume to a final pressure of 10 bar. a. find the change in internal energy for the system. b. calculate the amount of heat transferred, in kj. c. sketch both processes on a t-v diagram. (196.33 kj/kg, 76.33 kj)

An inventor claims to have developed a reversed heat engine (ie. a heat pump) which is able to deliver 10 kj heat into the room at 20°c from outside ambient temperature of -10°c by consuming only 2 kj electricity in winter. this claim is a)-impossible b)-possible only if the heat pump is ideal c)-practically possible d)-unable to be assessed as it depends on the working fluid used in the heat pump.