"Absolute Zero" is how many Fahrenheit degrees below freezing (water)?
What will be an ideal response?
491. F° below "freezing"
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Photoelectric Effect Using Stopping Potential: For a certain metal, light of frequency 7.24 × 10-14 Hz is just barely able to dislodge photoelectrons from the metal. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J, e = 1.60 × 10-19 C)(a) What will be the stopping potential if light of frequency 8.75 × 10-14 Hz is shone on the metal?(b) What is the work function (in electron-volts) of this metal?
What will be an ideal response?
What happens to a given mass of water as it is cooled from 4°C to zero?
a. expands b. contracts c. vaporizes d. Neither expands, contracts, nor vaporizes.
If the turn-off point of a cluster lies about type F, this cluster is very ________
Fill in the blank(s) with correct word
If we could watch spiral arms from a telescope situated above the Milky Way over 500 million years, what would we see happen?
A) Stars will move through the spiral arms, bunching up closer as they pass through. Young hot stars will form and die within the arms before having a chance to move out. B) The spiral arms will seem to "wind up," wrapping more and more tightly around the center of the Galaxy. C) The spiral arms will quickly dissipate and fade away, because they are a temporary phenomenon that should only last for a million years or so. D) The spiral arms will eventually unwind, as centripetal forces send the stars flying outward into intergalactic space.