It was once thought that a "black hole" absorbed all the radiation falling upon it and radiated none
If this were true, what would one infer the temperature of a black hole to be? Actually Stephen Hawking discovered that black holes have a VERY small probability of radiating. Modifying your first answer, would you now infer a large or small temperature for a black hole.?
If no radiation escaped, then its equivalent temperature would be 0 K. But since it radiates (very little) it must be slightly above absolute zero.
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What happens on or about March 20th, and what does the name signify?
What will be an ideal response?
Wave 1 has intensity 9.0 units while wave 2 has intensity 4.0 units. What is their ratio of amplitudes,
A1/A2? A. 20 B. 5.1 C. 2.3 D. 1.5 E. 1.3
Why do Jupiter, Saturn, Uranus, and Neptune all have rings?
a. They were left over from solar system formation. b. They all captured particles. c. All four planets had a large moon that disintegrated. d. All have small moons and orbiting particles that constantly collide and make rings.
The Greek astronomer who assigned the stars to six magnitudes was named ______________
Fill in the blank(s) with correct word