Engineering, 15.07.2020 01:01 lareynademividp0a99r
A spherical pressure vessel of 8.0 meter diameter is used to store liquid nitrogen gas at -40°C. An insulation with a thermal conductivity of 0.085 W/m-K and thickness 350 mm is applied to the tank to reduce the heat transfer. a) Determine the radial position in the insulation layer at which the temperature is 0°C when ambient air temperature is 20°C and the convection coefficient is 6 W/m²K. b) Repeat the same problem by considering contact resistance between sphere and the insulation of 0.2 K/W.
Answers: 1
Engineering, 03.07.2019 14:10
Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.
Answers: 1
Engineering, 03.07.2019 15:10
Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.
Answers: 1
Engineering, 04.07.2019 08:10
Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed
Answers: 1
Engineering, 04.07.2019 19:10
Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?
Answers: 3
A spherical pressure vessel of 8.0 meter diameter is used to store liquid nitrogen gas at -40°C. An...
Mathematics, 26.04.2021 23:30
Mathematics, 26.04.2021 23:30
Mathematics, 26.04.2021 23:30
Mathematics, 26.04.2021 23:30
Mathematics, 26.04.2021 23:30
Biology, 26.04.2021 23:30
History, 26.04.2021 23:30
Mathematics, 26.04.2021 23:30
History, 26.04.2021 23:30
Mathematics, 26.04.2021 23:30