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Find the maximum areaof a rectangle inscribed in a isosceles triangle with base 40 cm and height 30 cm. Justify that what you got is an absolute maximum.
air is heated electrically in a constant-diameter tube in a steady-flow process. at the entrance the air has a velocity
Air enters an automotive supercharger at 100 kPa and 300 K and is compressed to 150 kPa. the efficiency is 70%. What is the required work input per kg of air?
Refrigerant 134a flows at steady state through a horizontal tube having an inside diameter of .05 m. The refrigerant enters the tube with a quality of .1, temperature of 36 C, and velocity of 10 m/s. The refrigerant exits the tube at 9 bar as a satur..
A 10-lb block has an initial velocity of 10 ft/s on a smooth, horizontal plane. A force, F = (2.5 t) lb, where t is in seconds, acts horizontally on the block in its direction of motion. Determine an expression for the distance, s in terms of time, t
initially 0.05 kg of air is contained in a piston-cylinder device at 200 degc and 1.6 mpa. the air then expands at
a well-insulated turbine operating at steady state with seam enters at 3 mpa 400degc with a volumetric flow rate of 85
oil passes through a 5-m long 25-cm diameter circular pipe with a mass flow rate of 75 kgh. the oil enters the pipe at
A multiple disc has radial width of the friction material 1/5th of the maximum radius. The coefficient of friction is 0.25. Find the total number of discs required to transmit 60 kW at 3000 r.p.m. The maximum diameter of the clutch is 250 mm and the ..
a 300-foot-long 6-ft-wide parabolic trough concentrator receives normal solar radiation at 905 wm2. a pipe at the focal
one-half kg of refrigerant-22 is contained in a piston-cylinder assembly initially saturated vapor at 5bar. the
an aluminium bottle weighs 10 kgs when empty and has an internal volume of 20 liters. it is filled with 5 kgs of
at a amusement park there are 180kg bumper cars a b and c that have riders as shown with masses 40 kg 60kg and 30 kg
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