At noon on a cloud-free summer day, sunlight intensities at the Earth’s surface are nearly always less than 940 W/m2 (0.12 hp/ft2
).
(a) At this intensity, if the solar collector and electric motor could convert 10%
of the collected solar energy to mechanical power, how large a collector would
be required on a tractor to supply 100 kW (134 hp) of mechanical power?
(b) If the length of the collector was twice its width, what would be the
dimensions of the collector?

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg