Engineering, 27.11.2019 04:31 milkshakegrande101
Consider a 10-m-long tube with a diameter of 8 cm, subjected to uniform heat flux from all surfaces. a fluid enters the tube at a velocity of 8 m/s. the properties of air at 25°c are k = 0.02551 w/m·°c, ν = 1.562 × 10–5 m2/s, and pr = 0.7296 and the properties of water at 25°c are rho = 997 kg/m3, k = 0.607 w/m·°c, ν = 8.937 × 10–7 m2/s, and pr = 6.14. determine the convection heat transfer coefficient if the fluid used is air.
Answers: 2
Engineering, 04.07.2019 18:10
Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.
Answers: 3
Engineering, 04.07.2019 18:10
Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented
Answers: 2
Engineering, 04.07.2019 18:10
Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.
Answers: 3
Engineering, 04.07.2019 18:20
Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero
Answers: 2
Consider a 10-m-long tube with a diameter of 8 cm, subjected to uniform heat flux from all surfaces....
Mathematics, 05.01.2021 20:50
Biology, 05.01.2021 20:50
English, 05.01.2021 20:50
Chemistry, 05.01.2021 20:50
Mathematics, 05.01.2021 20:50
Mathematics, 05.01.2021 20:50
Biology, 05.01.2021 20:50
Mathematics, 05.01.2021 20:50