Q 1 Using dimensional equation, convert:
CHE 201 Tutorial 1
Q1 Using dimensional equation, convert:
a. 3 wk to milliseconds.
b. 26 miles/h to ft/sec
c. 26.7 cm4 /min2g to m4 /day2.kg
Q2 Using the table of conversion factor on the inside front cover, convert
a. 760 miles/h to m/s
b. 921 kg/m3 to Ibm/ft3
c. 5370 kJ/min to hp
Q3 Calculate
a. The weight in Ibf of a 25 Ibm object.
b. The mass in kg of a 25 N object.
c. The weight in dynes of a 10 ton object.
Q4 Prandtl number Pr is a dimensionless group, it is defined as:
[pic]
Where
CP = heat capacity of a fluid
( = fluid viscosity
k = thermal conductivity.
Calculate Pr for a particular fluid, CP = 0.583 J/g (C, k = 0.286W/m.(C and ( = 1936 Ibm / ft h.
Q5 Reynolds number Re is a dimensionless group, it is defined as:
[pic]
Where
D = pipe diameter
( = fluid viscosity
v = fluid velocity.
( = fluid density.
Calculate Re for a particular fluid, ( = 0.805 g/cm3, D =2.067 in , ( = 0.43 centipoise (1 cP = 0.001kg/m s) and v = 0.48 ft/s.
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