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A spur gear reducer has an 18-tooth pinion driven 1500 rpm by an electric motor and a 36-tooth gear that drives a load involving " moderate shock". Estimate the reliability with respect to bending f
The piston-cylinder system expands to 200°C and 100 kPa. How much work did the Carnot engine produce? Show your work.
If the wall thickness of the tube is 3 mm, What must the diameter be so that the safety factor against yielding (with respect to max shear stress theory) is 1.5?
The coefficient of static friction between the box and the surface is 0.5 and the pulley is frictionless. Determine The minimum rope tension T necessary to hold the box in place The normal force N.
A piston-cylinder containing 1 kg air at 500°C and 500 kPa is connected to a Carnot heat engine where the environment is 25°C and 100 kPa.
If 20 kg/s flows out of the condenser, what is the mass flow rate of the superheated stream, if saturated fluid leaces the heater at 500 kPa?
Determine the pressure exterted by the gas using Van der Waals equation of state (a=1.474bar(m^3/kmol)^2, b=0.0395m^3/kmol)
Consider the combustion of Octane, C8H18 with air, (O2 + 3.76 N2). Write and balance the stochiometric equation assuming complete combustion.
The plant's heat source is a large furnace operating at T(furnace)=477°C. The marketing material claims an efficiency of 57% for the plant. Prove if this can be true.
A go-kart including driver weighs 800 lbs. During an aggressive braking event, the vehicle decelerates from 60 mph to 15 mph in 2.0 seconds to negotiate a chicane. How much energy can be stored
Determine the temperature of the air entering the combustor (at the exit of the compressor). Determine the temperature of the combustion products leaving the combustor and entering the turbine.
What assumption must you make concerning the gas leakage rate of air from a pressurized tank if you can reasonably assume that the temperature of the gas left in the tank stays the same
Calculate the number of turns N in the spring such that it would provide the necessary energy to the glider. The total spring working deflection is x = 150 mm with a clash allowance of 10%.
Air enters an evaporative cooler at 1 atmosphere, 36°C, and 20 percent relative humidity at a rate of 4 m3/min. Determine (a) the exit temperature of the air and (b) the required rate of water sup
Assume the water temperature is 25oC. The pressure in the smaller section is P1=300 kPa. Calculate the downstream pressure, P2, and estimate the error that would have occurred if Bernoulli's equatio
The mass center of the rear-engine 3200-lb car is at G. Determine the normal forces Na an Nb exerted by the road on the front and rear pairs of tires for the conditions of being stationary.
A power cycle operating on 2kg of ideal argon (a closed thermodynamic system) consists of 3 parts. Find the thermal efficiency of the cycle. Sketch the P-v and T-s diagrams of the cycle.
Calculate the moid constant B. then compute the solidification time of a 0.5inch by 8inch by 8inch casting poured under the same condition?
If the cost of the machine and operator is $35/hr; the cost of twist drill is $10; the cost of indexable insert drill is $200; How many parts must be machined to justify the use of the indexable ins
Determine the rate of heat loss at the compressor, exit temperature of the refrigerant and the rate of entropy generation.
Find 1) the mass of the refrigerant and 2) the heat transfer to surroundings and the final temperature of the tank when the valve is closed.
What is the minimum diameter wire that can be produced from a 5 mm initial diameter, annealed copper wire? (K=315 MPa; n=0.54)
For the given chemical reaction, calculate the net effect due to changing from the standard state at 298 K to 2 bar and 400 K: delta Hrxn,298 =164.94 kJ/mo.
The lift coefficient at this speed is 0.45 and the drag coefficient is 0.065. The mass of the aircraft is 900 kg. Calculate the lift area for the craft, and the requried engine thrust and power.
What is the velocity in the boundary layer at a point 0.4 m down the plate (in the x direction) and 0.001 m above the surface (in the y direction)?