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A 40 student class is to be air conditioned with window air conditioning units each with 5 kw cooling capacities. a student at rest is assumed to dissipate heat at a rate of 360 kJ/h. there are 10 light fixtures in the room, each with a rating of 100 W. the rate of heat transfer into the class room through the walls and the windows is estimated to be 15000 kJ/h. if the room air temperature needs to be maintained at a constant 21 C how many window air conditioning units are required.
if a batch formula for 1950 kg of window glass consists of 200 kg of na2co3 1500 kg sio2 and an unknown amount of
determine the force and moment reactions at the support A of the built in beam which is subjected to the sine-wave load distribution.
a rigid closed tank of volume 3 m3 contains 5 kg of wet steam at a pressure of 200 kpa. the tank is heated until the
In a refrigerator 1 kW is removed from the -10 degree C cold space and 1.3 kW is moved into the 30 degree C warm space. Find the exergy fluxes including direction associated with the two heat transfers.
find and list information for the polymer-shaping process rotational molding. what typically is it used to make? you
a container has a circular hole d5cm on the bottom and is sealed by a metal ball weighs w2.452 with radius 4cm. water
a boat is subject to hydrodynamic drag forces of f 40v2n where v is the magnitude of velocity in ms. the boats mass is
1. air is to be compressed from 1 atm and 298 k to 8 atm at a rate of 20000 lmin. a determine if this process should be
air modeled as an ideal gas enters a steady state adiabatic turbine at 1200 k and exits at 100 kpa 700 k. the
Assume they test null hypothesis H0: versus H1: Will the engineers decide to use the steel if H0 is rejected? Will the engineers decide to use the steel if H0 is not rejected?
the rod of the fixed hydraulic cylinder is moving to the left with a constant speed. determine the corresponding
a flow is described by velocity field where a 0.2 s-1 and b 0.4 ms2. at t 2 s what are the coordinates of particles
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