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An air-standard Diesel cycle is operated with a compression ratio odf 20. The heat input is 300 Btu/lbm. At the beginning of the compression stroke, the conditions are 15 psia and 70 degrees F. Calculate the thermal efficiency of the engine and the mean effective pressure.
The Cost of Recharging a Battery, A 12-V automotive storage battery is charged with a constant current of 2 amp for 24 hr.
The 50-lb load is hoisted by the pulley system and motor M. If the crate starts from rest and by constant acceleration attains a speed of 15 ft/s after rising s = 6 ft, determine the power that must be supplied to the motor at this instant.
water flows near a flat surface and soe measurments of the water velocity u parallel to the surface at different
a sprinkler essentially consists of a pipe ab mounted on a hollow shaft. the water comes in the pipe at o and goes out
consider a steam power plant with reheat that operates on a modified rankine cycle. steam enters the high-pressure
question 1approximate the torque and power necessary to rotate the inner 20 cm diameter cylinder shown in figure 1. sae
a compressor takes in air at 100 kpa and 300 k and discharges it at 0.25 kgs at 1.2 mpa and 450 k. unfortunately the
air enters a compressor at ambient conditions of 100kpa and 17 degc with a low velocity and exits at 1mpa 327 degc and
the lifetime in hours y of an electronic component is a random variable with density function given bynbspfy1100 e-y100
water at a flow of m .215 kgs is cooled from 82 degrees c to 42 degrees c by passing it though a thin-walled tube of
a truncated cone 20 cm high is constructed of aluminum. the diameter at the top is 8 cm and the diameter at the bottom
for a 6061 t-6 aluminum beam with dimensions b 3.0 cm d 0.5 cm and length a 30 cm a what is the maximum mass that
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