Who won the Nobel Prize for explaining the photoelectric effect?
a. Bohr
b. Planck
c. de Broglie
d. Einstein
d
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The Sun appears to rotate only because Earth is revolving about the Sun
a. True b. False Indicate whether the statement is true or false
Runaway convection in Earth's atmosphere can lead to a. snow.
b. destruction of ozone. c. auroras. d. acid rain. e. violent storms.
One foolhardy day, a daring major (let's call him Tom) in the space force decides to become the first of his race to cross the event horizon of the black hole
To add to the drama, he decides to go in wearing only a thin space suit, which offers no shielding against radiation, no cushioning against any forces, and so on. Which of the following is most likely to kill him first (or at least cause significant damage)? (Hint: The key word here is first. Be sure to consider the distances from the black hole at which each of the noted effects is likely to become damaging.) A) the crush of gravity at the singularity embedded within the black hole B) the tidal forces due to the black hole C) the strong acceleration as he descends towards the black hole D) the X-rays from the accretion disk E) the sucking force from the black hole, which will cause his head to explode
Comet orbits all have ________ eccentricity compared to the asteroids
Fill in the blank(s) with correct word