Nuclear reactors that produce consumer power in present times are powered by
A) fission.
B) fusion.
C) both fission and fusion.
Answer: A
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Heat is transferred from a substance if it is exposed to something that has a lower temperature
a. True b. False Indicate whether the statement is true or false
An ideal Carnot engine is operated as a thermodynamic pump to heat a room in the winter
The thermodynamic pump delivers thermal energy to the room at the rate of 47 kJ per second and maintains the room at a temperature of 293 K when the outside temperature is 237 K. The power requirement to run the thermodynamic pump under these operating conditions is closest to A) 9000 W. B) 7100 W. C) 20,000 W. D) 15,000 W. E) 11,000 W.
Why does ice float on water?
a. Ice is hydrophobic and repels water. b. Water molecules have less mass the colder they get. c. Water molecules are spaced farther apart in ice than in liquid water. d. Vibrating electrons in liquid water push ice to the surface. e. Hydrogen bonds are weaker in ice.
The solar neutrino problem was solved when it was discovered that neutrinos ________ during the time they take to reach the Earth
Fill in the blank(s) with correct word