What must be the length of the bar
A 20 mm diameter steel bar is to be used as a torsion spring. If the torsional stress in the bar is not to exceed 100 MPa when one end is twisted through an angle of 15degree, what must be the length of the bar?
Expected delivery within 24 Hoursrs
A large stationary diesel engine produces 15 MW with a thermal efficiency of 40%. The exhaust gas which we assume is air, flows out at 800K, and the intake is 290K. How large is the mass flow rat? Can the exhaust flow energy be used?
Calculate the heat transfer of the plate, the bottom is insulated. What is the temperature at the bottom of the plate if the thermal conductivity of the plate is 25 W/m*K.
An ionic solid contains cation vacancies, anion vacancies, and cation interstitials. Compute the relative concentrations of all of the defect species. Assume that the cations and anions are monovalent.
A humidity ratio of 0.021 kg/kg dry air to 15°C and a humidity ratio of 0.015 kg/kg dry air. If the mass flow rate of dry air is 0.7 kg/s, What is the rate of heat removal from the air?
A cylindrical specimen of aluminum having a diameter of 19 mm and length of 200 mm is deformed elastically in tension with a force of 48,800 N. Using the data contained in Table 6.1
A heat-engine of 32% thermal efficiency is used to drive a refrigerator having coefficient of performance of 5. Determine the heat input into the engine for each MJ removed from the refrigerated space by the refrigerator.
If the tires do not slip on the pavement, determine the points on the tire that have a maximum and minimum acceleration.
Find the entropy production rate for the nozzle. The exit velocity for a reversible and adiabatic nozzle and find the nozzle isentropic efficiency.
Knowing that it strikes the water 4s after release, determine: (a) The speed at which the stone was thrown upward. (b) The speed at which the stone strikes the water.
Air at 120 kPa and 260 K is compressed steadily to 575 kPa and 405 K. The mass flow rate of air through the compressor is 0.025 kg/s. A heat loss of 15 kJ/kg occurs during the process.
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!