Gamma-ray bursts lasting longer than two seconds appear to be related to ______________
Fill in the blank(s) with correct word
hypernovae
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One of the first atomic bombs released energy equivalent to that of 20,000 tons of TNT explosive. How much mass was converted to energy by this explosion, given that 1000 tons of TNT produce 4.3 × 1012 J of energy
Incidentally, modern H-bombs have energy yields 1000 times as much! (c = 3.0 × 108 m/s)
Which of the following is true of the signs of the zodiac?
A) They have a huge impact on the seasons. B) They are no longer important in astronomy. C) They determine the course of Earth's orbit. D) They are no longer important in astrology.
When I stand halfway between two speakers, with one on my left and one on my right, a musical note from the speakers gives me constructive interference. How far to my left should I move to obtain destructive interference?
a. one-fourth of a wavelength c. one wavelength b. half a wavelength d. one and a half wavelengths
You do not get a sunburn, even on a sunny day, if you are behind glass. This is because
A) the glass blocks the ultraviolet, infrared, ultraviolet, X-rays, and gamma rays from the sun. B) the glass blocks the X-rays and gamma rays from the sun. C) the glass blocks the infrared radiation from the sun. D) the glass blocks both the ultraviolet and the infrared radiation from the sun. E) the glass blocks the ultraviolet radiation from the sun.