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A hob that has a pitch diameter of 76.2 mm is used to cut a gear having six teeth. If a cutting speed of 27.4 m/min is used, what will be the rpm value of the gear blank?
1. Hydrogen (H2) enters a combustion chamber with a mass flow rate of 5 lb/h and burns with air entering at 858F, 1 atm with a volumetric flow rate of 75 ft3/min. Determine the percent of theoretical air used.
an ideal vapor-compression refrigeration cycle with ammonia as the working fluid has an evaporator temperature of -20 c
Refrigerant R134a is compressed under steady conditions from a saturated vapour at 100 kPa to 500 kPa. The compressor’s isentropic efficiency is 85%. Heat losses from the compressor can be ignored, as can kinetic energy and potential energy effects.
for the process where q 62.5 kjkg and wkcs 60 kjkg determine the energy change if the system mass is 2 kg 2. into a
Air flows at the rate of 2.3 kg/s in a 15cm diameter pipe. It has a pressure of 7 bar and a temperature of 95 degrees Celsius before it is throttled by a valve to 3.5 bar. Find the velocity of the air downstream of the restriction,
a plate clutch has a single pair of mating friction surfaces 300 mm od by 225 id. the mean value of the coefficient of
For T 5 808F, determine the steam quality at the turbine exit, the steam mass flow rate, in lb/h, and the thermal efficiency. Plot the quantities of part (a) versus T ranging from 80 to 1058F.
the water in a 25 m deep reservoir is kept inside by a 150 m wide wall whose cross section is an equilateral triangle.
Given the roughness of the pipe
problem 110degc water is flowing in a 10-mm diameter smooth tube. the mass flow rate of the water is 0.15 kgs. the
(a) What is the rate of water loss due to evaporation on the summer day? (b) What is the total convective heat loss on the sum- mer day?
When does a 2x2 orthogonal matrix Q with det(Q) = 1 describing a 2 dimensional rotation have real eigenvalues and eigenvectors?
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