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Consider an ideal gas at 400 K and 100 kPa. As a result of some disturbance, the conditions of the gas change to 404 K and 96 kPa. Estimate the change in the specific volume of the gas using (a) Eq. 12-3 and (b) the ideal-gas relation at each state
Mark's refrigerator has just died. He can get a basic fridge or a more efficient fridge with an Energy Star designation. Mark wants to consider a 10 year planning horizon using an interest rate of 5%.
An industry discharges PCE (tetrachloroethene, tetratchloroethylene, or perchloroethylene) into a small, well-mixed lake. The influent concentration is 0.4mg/L and the hydraulic residence time of the lake is 5days.
Four forces act on a small airplane in flight: its weight (26 kN), the thrust provided by the engine (9 kN), the lift provided by the wings (25 kN), and the drag resulting from its motion through the air (3 kN).
A stream is in equilibrium with atmospheric oxygen upstream of a waste outfall. The waste outfall creates a BODo of 20 mg/L in the stream. The k(BOD) is 0.4 /day and the k(o2) is 1.4 / day. The stream temperature is 15 degrees Celsius.
An SAE steel wire (1mm diameter) is coated with another cover to form a composite material with diameter of 2 mm. a) determine the elastic modulus of the composite material;
Compute the stresses and deflections at the corner of the slab according to Westergaard and Ioannides. Compute the stresses and deflections at the edge and interior according to Westergaard.
For a location in Oshkosh, WI, estimate the total volume, in thousand board feet (MBF), for 100 pieces of 2" x 8", 16-feet-long board by using CostWorks.
Convert the bearings to azimuths from north and compute theangle . smaller then 180 degree. between successive bearings.
Knowing that the magnitude of P is 35 N, determine by trigonometry (a) the required angle a if the resultant R of the two forces applied to the support is to be horizontal, (b) the corresponding magnitude of R.
Problem: The block of a control system is shown below.
A sealed insulated room contains 90 m^3 air at 12 C and 100 kPa. A container with 45 kg of water at 95 C is placed in the room. After heat transfer between the air and water, thermal equilibrium is reached.
a car travelling at 60 mph in a construction area skids into a stack of concrete barriers. skid marks leading to the
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