To turn 1 gram of boiling water to steam requires
A) almost as much energy as changing 1 gram of 0°C water to the boiling point.
B) as much as increasing 1 kilogram of 95°C water to the boiling point.
C) more energy than needed to turn 1 gram of absolute-zero ice to the boiling point.
D) none of the above
Answer: C
You might also like to view...
The phase of the Moon on a particular night is determined by
a. the season of the year. b. the speed of the Moon in is orbit. c. the relative positions of the Sun, Earth, and Moon. d. how the Earth's shadow hits the Moon. e. the distance from the Earth to the Moon.
Why have very few planets with low mass (comparable to Mars or Mercury) been found?
A) These small planets are very rare. B) Low mass planets do not produce large enough radial velocity changes in their stars. C) High mass planets are blocking our views of low mass planets. D) Hot Jupiters have ejected most low mass planets from their solar systems. E) Low mass planets are too far from their parent stars to receive enough light to make them visible from Earth.
Estimate the distance (in cm) between the central bright region and the third dark fringe on a screen 5.00 m from two double slits 0.500 mm apart illuminated by 500-nm light.
A. 3.47 B. 2.15 C. 1.75 D. 1.50 E. 1.25
Which of the following is the best answer to the question, "Why does the Sun shine?"
A) The Sun initially began making energy through chemical reactions. These heated the interior enough to allow gravitational contraction and nuclear fusion to occur. B) The Sun initially began generating energy through nuclear fusion as it formed, but today it generates energy primarily through the sunspot cycle. C) As the Sun was forming, nuclear fusion reactions in the shrinking clouds of gas slowly became stronger and stronger, until the Sun reached its current luminosity. D) As the Sun was forming, gravitational contraction increased the Sun's temperature until the core became hot enough for nuclear fusion, which ever since has generated the heat that makes the Sun shine.