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%

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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?

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Water trough space should be increased as birds get older.

Answer the following statement true (T) or false (F)

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What are some of the issues facing architects who are designing new urban communities in the 21st century?

What will be an ideal response?

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