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A solid cube of wood having dimensions of 0.5 m3 is floating in water with 0.3 m of its dimension above the surface. What is the specific weight of the wooden cube?
Determine the minimum bolt diameter required to support an applied load of P = 155 kN if a minimum factor of safety of 2.0 is required with respect to both bolt shear and plate bearing failure.
A power plant burns gas with HHV of 55,000 KJ/KG to generate electricity of 10 MW. If the overall efficiency is 40%, how much natural gas needs to be burned every day?
Determine 1) the energy flow rate of the oil at the inlet; 2) the difference of energy flow rate between the outlet and inlet; 3) the overall efficiency of the motor-pump system?
If cutting speed = 3.5 m/s, the tool must be changed every 3 workparts; but if cutting speed = 2.5 m/s, the tool can be used to produce 20 pieces between tool changes. Determine the cutting speed th
A fan is to accelerate quiescent (velocity is 0 m/s) air to a velocity of 10m/s at a rate of 3 m3/s. If the density of air is 1.15 kg/m3, determine the minimum electric power that must be supplied t
Assuming the average fuel composition and energy content are CH2 and 15000 Btu/lb, respectively, calculate the U.S. contribution to global carbon emissions in 2008. Give your answer in Gt of carbon.
Consider a cylindrical nickel wire 1.9 mm in diameter and 3.2 × 104 mm long. Calculate its elongation when a load of 260 N is applied. Assume that the deformation is totally elastic and that t
If these viscosities are the safe limits for the oil, specify the maximum start-up speed and the maximum running speed you would recommend for the pump.
A cylindrical specimen of some metal alloy having an elastic modulus of 108 GPa and an original cross-sectional diameter of 3.9 mm will experience only elastic deformation when a tensile load of 169
Oil "A" has a viscosity of 80Cst at 40C and 8Cst at 100C. Oil "B" has a viscosity of 90Cst at 40C and 15Cst at 100C. Which oil has the higher viscosity index?
A fenced enclosure consists of a rectangle of length L and width 2R, and a semicircle of radius R, as shown in Figure P20. The enclosure is to be built to have an area A of 1600 ft^2. The cost of th
A piston cylinder system stores 15 kg of water that is initially at 120 degrees Celsius, with 0.25 quality. A two step process occurs, such that the final state has a pressure of 300 KPa.
Assuming uniform deformation and volume constancy, (a) determine the engineering stress and strain, (b) determine the true stress and strain.
Calculate the center to center distance between adjacent atoms of tungsten along the following directions. Speculate as to why such information may be important in understanding the behavior of the ma
A solar hot water heater raises the temperature of 200 liters of water from 27 to 47 degrees C. Suppose a heat engine with 40 percent of the efficiency of a Carnot engine had absorbed the same amoun
Calculate the engineering strain and the true strain for both steps compare them, and comment on your observations.
A class room that normally contains 40 people is to be air conditioned with window air conditioning units of 5 -kW cooling capacity. A person at rest may be assumed to dissipate heat at a rate of ab
Derive an expression for the temperature distribution in the portion of the steel strip with the plastic film (-w1/2 < x < +w1/2).
A floating platform weighs 30 kN. A hollow sealed cylinder 1 m in diameter weighs 1 kN per meter of length. The water has a specific weight is 10 kN/m^3.
Assuming the pressure transducer is highly linear, perform a two pont calibration using the two given data points. What is the bias, in psi, of the transducer?
Determine the power required for a 1150-Kg car to climb a 100-m-long up hill road with a slope of 30degrees (from horizontal ) in 12 s (a) for a constant velocity (B) from a rest to a final velocity
Model air as an ideal gas with C_p equal to 29.3 J/mol-K, and calculate the pressure and temperature as a function of time. How long does it take until the tank is within 5 K of the steady-state val
The water is then heated until its temperature is 400oF. What is the mass in the vessel? What is final specific volume? What is its final state?
Two rods made of copper and steel are positioned between two rigid walls as shown. Calculate the force in the rods if they are heated from room temperature to 520F.