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A cyclist is able to obtain a maximum speed of 20 mph on a calm day. The total mass of the rider and bike is 90 kg. The rollingresistance for the tires (a constant force) is FR = 7.5N and the drag coefficient and frontal area are CD = 1.2 and A = 0.25m2.Assuming CD is constant, compare the power requirements and calculate the following:(A) What is the maximum speed that the cyclist can reach in a headwind of 5 mph? (ANS: V ∼ 15 mph)(B) In a tailwind of 5 mph?
this isnt a specific problem but a question in general. when is it appropriate to use double integrals in solving for
Water at 20°C flows past a circular cylinder in cross-flow at a free stream velocity of 0.5 m/s. The cylinder is 0.02m in diameter and has a length of 0.5m in the cross-stream direction. The cylinder is at a temperature of 60°C. Find the rate at whic..
Determine the refrigeration load QL and The COP of the refrigerator - If the isentropic efficiency of compressor is 0.8 calculate the actual work of the compressor.
The local atmospheric pressure in Denver, Colorado (elevation 1610 m), is 83.4 kPa. Air at this pressure and at 30°C flows with a velocity of 6 m/s over a 2.5-m 8-m flat plate whose temperature is 120°C.
What is the evaporation rate of water from the cylinder per unit length (kg/h · m)? What electrical power per unit length of the cylinder (W/m) is required to maintain steady-state conditions?
Find graphically the forces f1 and f2 in the crane. The triangle is standing up with a 90 degree angle next to the wall on top, with f1 pointing towards it
an air conditioner can produce a 120 kjmin cooling effect while rejecting 2.5kw of heat. what is its cop and the
A cylinder fitted with a piston containing 1 kg of refrigerant 134a at 20C and 90% vapor quality is attached to a line flowing refrigerant 134a. The total restraining force on the piston is proportional to the cylinder volume squared. The valve is no..
A flow of 90% CH4, 10% H2 is passed into a furnace at 900 K. Determine whether carbon forms if the total pressure is 1.2 atm, carefully justifying your answer. Calculate the composition ( expressed as a molar percentage) of the gaseous mixture at thi..
Hazen-Williams Formula- Find the Diameter of a Pipe, The length of cast-iron pipe is to be 4200 ft., and the head causing flow is to be 12.6ft. After the pipe has been in service 5 years, it is expected to discharge water at a rate equal to 3.2 cf..
A path loss model is given by the following equation
assume that a drop of mercury is an isolated sphere. what is the capacitance of a drop that results when 10 drops each
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