An engineer wants to use a river (minimum temperature of 
to cool his electrical plant which heats water with a boiler operating at 
If he wishes to produce 185 kW of power using this plant, what is the minimum energy he must supply to his boiler if it is maximally efficient?
A. 233 kW
B. 187 kW
C. 332 kW
D. 418 kW
D. 418 kW
You might also like to view...
Force on a Wire: A vertical wire carries a current straight up in a region where the magnetic field vector points toward the north. What is the direction of the magnetic force on this wire?
A. downward B. toward the north C. toward the east D. toward the west E. upward F. toward the south
When a 0.350-kg package is attached to a vertical spring and lowered slowly, the spring stretches 12.0 cm
The package is now displaced from its equilibrium position and undergoes simple harmonic oscillations when released. What is the period of the oscillations? A) 0.695 s B) 0.483 s C) 0.286 s D) 0.0769 s E) 1.44 s
Identical 4.0-mC charges are placed on the y axis at y = ±4.0 m. Point A is on the x axis at x = +3.0 m. Determine the electric potential of point A (relative to zero at the origin)
a. -4.5 kV b. -2.7 kV c. -1.8 kV d. -3.6 kV e. -14 kV
Give a brief account of the abundance of chemical elements in the Universe
What will be an ideal response?