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Two parallel rectangular surfaces 1m ×2m are opposite to each other at
a distance of 4m, The surfaces are black and at 100°C and 200°C.
Calculate the heat exchange by radiation between the two surfaces
A bicycle has a momentum of 24 kg m/s. What momentum would the bicycle have if it had…
… twice the mass and was moving at the same speed?
Answer 1
… the same mass and was moving with one-half the speed?
Answer 2
… three times the mass and was moving with twice the speed?
Answer 3
… one-half the mass and was moving with twice the speed?
Answer 4
… the same mass and was moving with twice the speed?
Answer 5
… three times the mass and was moving with one-half the speed?
Instead of silver nitrate, what other salt could be used to differentiate fluoride from the heavier halides?
Use Raoult's Law and calculate the vapour and liquid compositions in equilibrium (in mole fractions, y and x) for the A-B components system using vapour pressure data measured at a pressure of 101.32 kPa as shown in Table 1 below. Draw the Temperature composition diagrams the Equilibrium distribution (x-y) plot as well.
Table 1: vapour pressure data measure
Temperature
60
78
86
92
96
101
Vapour pressure
Component A
101.325
132
156
178
195
235
Component B
0
58
68
78
88
101.325
40 grams of 80% NaOH was added to 250 cubic centimetre solution of 3 moldm^-3 NaOH. Calculate the new concentration.
When the blender is empty and running at high speed, how much time is required for a blade to turn by 90 degrees
Methanol (M) is to be separated from water (W) by atmospheric distillation. The feed contains 22 kg/hr methanol and 25 kg/hr water. The distillate contains 90 mol% methanol and the bottom product contains 5 mol% of methanol. The feed is saturated.
(a) Calculate the molar flow rates of methanol and water in the bottom and distillate product stream.
(b) Determine the minimum number of stages and minimum reflux for the problem. If the equilibrium data is given as;
x 0.032 0.0523 0.075 0.154 0.225 0.349 0.813 0.918 1
y 0.19 0.2494 0.352 0.516 0.593 0.703 0.918 0.953 1
In the sample of Aluminum Oxide (Al2O3), there are 48g O for every 54g of Aluminum. What is the ratio of Aluminum to Oxygen?
Integrate (1/(x+1)) dx within the limits 0 to 4 in four parts using Simpson rule
Methanol (M) is to be separated from water (W) by atmospheric distillation. The feed contains 22 kg/hr methanol and 25 kg/hr water. The distillate contains 90 mol% methanol and the bottom product contains 5 mol% of methanol. The feed is saturated. Calculate the molar flow rates of methanol and water in the bottom and distillate product stream.
