What are the conditions that the total three-phase power, in watts, can be determined?
What will be an ideal response?
The total three-phase power, in watts, can be determined for these conditions:
1. The three coil currents are the same.
2. The three coil voltages are equal.
3. The power factor angle is the same for each coil winding.
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The Brayton cycle efficiency is nearest:
The pressure and temperature at the inlet to the ideal Brayton cycle shown, are 100 kPa and 10ºC. It has a compression ratio of 8. The maximum temperature in the cycle is 1000ºC. Assume constant specific heats from Table B-2 for all
calculations.
A) 53%
B) 49%
C) 45%
D) 41%
In an experiment, a sphere of crystalline sodium chloride (NaCl) was suspended in a stirred tank filled with water at 20°C. Its initial mass was 100 g. In 10 minutes, the mass of the sphere was found to have decreased by 10 percent. The density of NaCl is 2160 kg/m3. Its solubility in water at 20°C is 320 kg/m3. Use these results to obatin an average value for the mass transfer coefficient.
What will be an ideal response?
Water trough space should be increased as birds get older.
Answer the following statement true (T) or false (F)
What are some of the issues facing architects who are designing new urban communities in the 21st century?
What will be an ideal response?