Heat exchangers are important. Explain their use in power plants, including large scale solar power plants
What will be an ideal response?
The working fluid of the power plant may be water or some other fluid. At the
final stage, the working fluid is usually water or steam that turns the turbine blades. Many
power plants use working fluids at high pressure (as, for example, nuclear pressurized water
reactors or solar towers). In order to get from the high-pressure working fluid to water or
steam, at least one heat exchanger is necessary.
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An important radiometric dating process is the decay of potassium-40 to ______________-40
Fill in the blank(s) with correct word
In the vicinity of what frequency does an object with a temperature of 1000 K radiate the largest amount of power?
(c = 3.00 × 108 m/s, Wien displacement law constant equals 2.90 × 10-3 m ? K, ? = 5.670 × 10-8 W/m2 ? K4) A) 8.0 × 1014 Hz B) 6.7 × 1014 Hz C) 2.3 × 1014 Hz D) 1.0 × 1014 Hz E) 4.1 × 1014 Hz
Evidence that things are made of atoms comes from
A) the way that laser beams pass through air. B) the fact that objects accelerate as they fall. C) Brownian motion. D) the fact that we can cut solid objects into smaller and smaller pieces. E) superconductivity.
When an atom undergoes a "quantum jump" into a lower-energy state, the atom
A) emits a photon. B) absorbs an electron. C) absorbs a photon. D) emits an electron. E) None of the above.