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A microphone having an open-circuit sensitivity of -55 dB is said to have a noise level of 28 dB. For a sound level of 90 dB, what is the voltage output referenced to the noise level?
A closed rigid tank is filled with refrigerant 134a, initially at 10C a quality of 80% and a volume of 0.01m^3. A 12volt battery provides a 5amp current to the resistor for 5 minutes. If the final temperature of the refrigerant is 40C, a) determine t..
Calculate the standard deviation of the unknown concentration and its 95% confidence interval assuming that each of the data in the table was obtained in a single experiment.
a 200 3 250-mm panel of mass 20 kg is supported by hinges along edge ab. cable cde is attached to the panel at c passes
A six cylinder engine runs at 4000 RPM with a compression ratio of 8:1 and a total clearance volume (total for all 6 cylinders) of 600 mL at TDC. The engine intakes atmospheric air at 100 kPA & 20C. The maximum temperature during the cycle is 1500 C
Define the following terms (i) closed die forging (ii) roll forging. Describe two purposes of lubrication in forging
Make a Sketch to illustrate your answer. What kind of equipment or machinery is used to construct and operate the landfill?
Calculate adiabatic flame temperature butane (C4H10) burning in air at 298 k and 1 atm, assuming complete combustion and constant specific heats.
One kilogram of air in a piston-cylinder assembly undergoes a thermodynamic cycle consisting of three processes: Process 1-2: Constant specific volume At state 1, the temperature is 323 K, and the pressure is 1 bar. At state 2, the pressure is 2 bar...
one pound mass of water in a piston-cylinder assembly initially a saturated liquid at 1 atm undergoes a
Calculate the theoretical density of FCC Copper, which has an atomic radius of 0.128 nm and the atomic weight of 63.55 g/mol.
The lubricant that fills the 0.3-mm gap between the shaft and bearing is an oil having a kinematic viscosity of 8.0 ×10-4 m2/s and a specific gravity of 0.91. Determine the force F required to pull the shaft at a velocity of 3 m/s. Assume the velo..
you are designing a remote-area power supply based on a miniature wind turbine that is 20 efficient. meteorological
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