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Assuming this carbon has a bulk density of 25 lb/ft3, and if the bed must be at least 1.5 feet deep, calculate the superficial gas velocity in a bed that contains this amount of carbon.
A light truck weighs 3100 lb and is rated at 30 miles per gallon for a 60 mph highway driving on level ground. How much power must the engine produce to climb a hill with a grade of 2%, neglecting
A centrifugal pump, located above an open water tank, is used to draw water using a suction pipe (8 cm diameter). The pump is to deliver 20oC water at a rate of 0.02m3/s. The pump manufacturer has s
Apple juice at 20C is siphoned from a large tank using a constant-diameter hose. The end of the siphon is 1m below the bottom of the tank. Height of the juice in the tank is 2 m. The atmospheric pr
At the end of year 5 repair costs are $4,000 and increase $500 per year afterwards. Draw the cash flow diagram for this investment. What is the equivalent annual cost of the tracking machine over th
You have been asked to estimate the cost of 100 prefabricated structures to be sold to a local school district. Each structure provides 1,000 square feet of floor space, with 8-feet ceilings.
Stray heat transfer from the heat exchanger may be neglected. Consider constant specific heats for both water and air. Calculate the rate of entropy generation (kW/K) for the air flow.
A differential nitrogen pressure exists across a 3 mm thick steel furnace wall. After some time, steady-state diffusion of the nitrogen is established across the wall.
A particle is moving along a straight line such that its acceleration is defined as a= (-2v) m/s^2, where v is in meters per second. If v = 20 m/s when s=0, and t=0, determine the particle's positi
Steam at 400F enters an insulated turbine operating at steady state and exits at 3 lbf/in^2. If the isentropic turbine efficiency is 72%, determine the range of turbine inlet pressures that ensures
A polymer component that needs to maintain a stress level above 10 MPa for proper functioning of an assembly is scheduled to be replaced every two years as preventative maintenance.
Silicon carbide (SiC) has a specific gravity of 3.1 g/cm^3. A sintered SiC part is produced, occupying a volume of 500 cm^3 and weighing 1200 g. After soaking in water, the part weighs 1250 g.
Saturated liquid R-134a at 50 psia enters an adiabatic throttling value at a rate of 0.2-lbm/s. The outlet pressure is 15 psia. What is the outlet volumetric flow rate in ft^3/s?
Parallel plates form a solar collector that covers a roof, with a 4m long plates and 1m between plates. The plates are maintained at 15 C., while ambient air at 10 C flows over the roof with V= 2 m/
A rigid tank is divided into two equal parts by a partition. One part of the tank contains 2.5 kg of compressed liquid at 400 kPa and 60 degrees Celcius while the other part is evacuated. The partit
Heat loss from the balloon causes all the water to condense into a saturated liquid. How much energy left the balloon, in Btu?
The coefficient of friction between all contacting surfaces is 0.3. Calculate the minimum force F required to start C moving upward.
An adiabatic gas turbine using helium has inlet conditions 5 MPa and 500°C and outlet conditions of 50 kPa and 100°C. How much power does it produce in units of kJ/kg? Neglect any changes i
Evaluating exergy at 8.5 cents per kW*h, determine the annual cost, in $/year, associated with the exergy destruction, assuming 8400 hours of operation annually.
A plate of stainless steel has a thickness of 3.0 cm and is initially uniform in temperature at 500C. The plate is suddenly exposed to a convection environment on both sides at 40C with h=150W/m^2*
A window frame manufacturer is searching for ways to improve revenue from its triple- insulated sliding windows, sold primarily in the far northern areas of the United States.
Steam at 3 Mpa, 500C, enters an insulated turbine operating at steady state and exits at 0.3 Mpa. Determine the maximum power (rate of work) developed in kW/kg.
Air at 1 bar and 20 degrees C is compressed isentropically to 20 bar pressure. For both a) and b) assume that air is an ideal gas. Calculate the fianl temperature if the specific heat is variable.
The inlet to a boiler of a Carnot power cycle is at 5 Mpa, saturated liquid, and the exit is saturated vapor. The condenser operates at 1 bar. Determine the thermal efficiency.
If the final pressure is 1 bar, determine the specific enthalpy if the turbine is isentropic. b) Determine the final specific enthalpy using part a) information, except that the isentropic efficienc