Given the vectors A = 2.00iˆ + 6.00jˆ and B = 3.00iˆ + 2.00jˆ, a) draw the vector sum C = A + B and the vector difference D = A - B. B) Calculate C and D, first in terms of unit vectors and then in terms of polar coordinates, with angles measured with respect to the + x axis.

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.