How long will it take for the surface temperature

Assignment Help Mechanical Engineering

Reference no: EM13718976

A long aluminium cylinder 50cm in diameter is initially at a uniform temperature of 200°C. It is suddenly subjected to a temperature of 70°C and h = 535W/m²K. How long will it take for the surface temperature to reach 100°C.?

Reference no: EM13718976

Questions Cloud

Calculate starin in axial and transverse direction : A 10-ft long rectangular ASTM Grade 50 steel plate 1-in by 12-in cross section is used as a hanger and is subjected to a tensile load of 240,000 lb . the modulus of elasticity for steel is 30,000,000 psi and the poison ratio is 0.25

Compute the stress-strain and total elongation : A 24 in long bar with a cross sectional area of 1.0 in^2 is subjected to an axial tensile load of 10,000 lb. compute the stress, strain and the total elongation if the bar material is :

Determine the air velocity at the exit when inlet velocity : The exhaust nozzle of a jet engine expands air at 388 kPa and 174 C adiabatically to 95 kPa. Determine the air velocity at the exit when the inlet velocity is low and the nozzle isentropic efficiency is 96 percent.

Suspended in a room filled with saturated steam : A 1.2-cm-diameter silver sphere initially at 25°C is suspended in a room filled with saturated steam at 100°C. Using the lumped system analysis, determine how long it will take for the temperature of the ball to rise to 50°C. Also, determine the amou..

How long will it take for the surface temperature : A long aluminium cylinder 50cm in diameter is initially at a uniform temperature of 200°C. It is suddenly subjected to a temperature of 70°C and h = 535W/m2K. How long will it take for the surface temperature to reach 100°C.?

Aerodynamics of a new prototype automobile a scale model : To test the aerodynamics of a new prototype automobile a scale model will be tested in a wind tunnel. For dynamic similarity, it will be required to match Reynolds number between model and prototype.

Determine the safety against the brittle fracture : An engineering member is to be made of 18-Ni maraging steel (vacuum melted). The member is a plate loaded in tension, and it may have a crack in one edge. The dimensions are width b=35 and t=5.0mm, and the crack may be as long as a=7.0 mm.

Use the approximation equation for contact stress : A gear set has a module of 5mm, a 20° pressure angle, and a 24-tooth case-iron spur pinion driving a 48-tooth case-iron gear. The pinion is to rotate at 50 rev/min. What horsepower input can be used with this gear set if the contact stress is limited..

Final equilibrium temperature and entropy generation : A container filled with 73 kg of liquid water at 99ºC is placed in a 60-m3 room that is initially at 12ºC and 1 atm. Thermal equilibrium is established after a while as a result of heat transfer between the water and the air in the room. Using consta..

User Account

All Pages