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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)?
Bob is asked to design a system for heating process water in a chemical plant. What capacity of natural gas burners must Bob provide, measured in BTU/H?
Find the thermal efficiency of an ideal reheat Rankine cycle of a steam power plant. Find the pressure at which reheating takes place and the total rate of heat input to the boiler.
Determine the enthropy change of the system and the surrounding and show that the principle of increase of entropy is satisfied.
An ideal gas contained in a piston-cylinder assembly is compressed isothermally in an internally reversile process. Determine if the entropy change of the gas is greater than, equal to or less than ze
Air enters a converging-diverging nozzle at 700 kPA, 240 K, and Ma = 0.3. What back pressure will produce supersonic outflow?
If the coefficient of static friction between the beam and the block is u_s=0.4 , and between the rope and the peg is u_s= 0.5 s, determine: the maximum distance that the block can be placed from A
What flow rate of natural gas (in cubic feet per hour) would be required to serve a 150,000 btu/hr output capacity, conventional boiler at full capacity?
What cooling air flow rate would be required to maintain a space at 72 degrees F if it had a sensible cooling load of 25,000 BTU/HR and a latent cooling load of 8,000 BTU/hr?
Knowing that the coefficient of friction is uk=0.31, determine how far the package will travel down the ramp in 3 seconds. The ramp is angled at 30 degrees.
Refrigerator operates at steady a coefficient of performance of 5.0 within a kitchen at 238C. Determine the lowest theoretical temperature inside the refrigerator, in K.
Air enters an insulated turbine operating at steady state at 8 bar, 11278C and exits at 1.5 bar, 3478C. Determine whether the expansion is internally reversible, irreversible, or impossible.