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Initially the helium is at 400 kPa, 4oC, and occupies a volume of 0.04 m3. To what pressure must the He expand in order to perform 8100 J of work?
If the drill bit diameter is 0.25" and length is 5" and has a modulus of rigidity G, determine the maximum torsional shear stress on the drill bit.
It is a peculiarity of an ideal gas that its internal energy is a function of only temperature. What is the net energy transfer as heat for the process described?
Assume that all of the unit cells of a piece of aluminum with dimensions 4in X 4in X 0.001in are arranged so that a0 is perpendicular to the foil surface. Determine the total number of unit cells in
Derive an expression for the work done on the gas. It is a peculiarity of an ideal gas that its internal energy is a function of only temperature.
Calculate the energy of the piston as it contacts the water. Assuming all this energy is transferred to the water, calculate the velocity the water achieves.
Five kg of a material is heated at constant volume from a state where its internal energy is 40 MJ/kg to a state where its internal energy is 60 MJ/kg.
Consider a system which is initially an ice cube 1 meter on a side. How much work does this system do on the atmosphere when it melts?
Estimate the cost an oil change (5 quarts of oil) and new oil filter for your automobile at a local service station.it takes a technician 20 minutes to do this job.
The thermal conductivity of Material A is half that of Material B, that is KA/KB= 0.5. Sketch the steady-state temperature and heat flux distributions, T(x) and q''x(X) respectively.
Determine the relevant nozzle areas to expand the gas to standard atmospheric pressure. Calculate the force required to maintain the nozzle in the duct. The gas has k = 1.4 and R = 265 N.m/Kg.K./
The air and CO behave as ideal gases with constant specific heat ratio, k=1.395. Determine at equilibrium the temperature (K), the pressure (bar) and volume occupied by each gas (m3 ).
The valve opens and steam enters the tank. The valve closes when the water is a 500Kpa and saturated liquid conditions.
How many oscillation cycles will elapse if you're waiting for the oscillation amplitude of a spring-mass-damper system to drop by 25% and damping( squiggly symbol) 0.04?
The conduit between the turbine and nozzle (nozzle) output of an engine is 0.60 m in diameter. Calculate the force required to maintain the nozzle in the duct. The gas is k = 1.4 and R = 265 n.m / kg.
If the mass is deflected 2cm down, measured from its equilibrium position, and given an upward velocity of 8cm/s, determine its amplitude and maximum acceleration.
Block B is attached to the 20mm inner diameter. Block A drops vertically and block B travels horizontally. Determine the linear velocity and the acceleration of block B.
How would the wheel diameter and the volumes of the containers holding the working substance affect performance? Are there any practical applications for such a device? Discuss?
Plot a curve of the specific exergy of 1 kg of a substance that has a constant specific heat of 1 kJ/kg-K over the temperature range -100°C to +1000°C
Compute the entropy production and the exergy (work) loss due to the exchange of heat across a finite temperature difference. The heat exchanger shell is perfectly insulated.
The inlet area od the nozzle is 50 cm squared and the heat is being lost at a ate of 90KJ/s. Determine the mass flow rate of the system.
Assuming that each atom of the substitute is equally effective as V atom, what weight percent of the substitute would you recommend to replace 0.05 wt %?
Heat transfer from the cycle is qout = 100 kJ/kg. Assume the temperature independent properties for air. What is the value of the inlet pressure to the turbine?
An ideal air-standard closed Brayton cycle operates between the pressures of 1 atm and P2. What is the value of the inlet pressure to the turbine?