What is the reason a type I supernova slows its dimming after about 2 months?
A) The planetary nebula cooled enough to form a dust shell.
B) Energy is released from the decay of radioactive cobalt 56 to iron 56.
C) The supernova remnant suddenly becomes transparent.
D) The burst of energy carried by neutrinos is finally observed.
E) Energy from the supernova's shock wave is released as it hits interstellar matter.
B
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What is the size of the largest asteroid?
A) 1 km B) 10 km C) 100 km D) 1,000 km E) 10,000 km
The condition in which the cornea or the lens is irregularly shaped
A. Astigmatism |
B. Eye Dominance |
C. Focus |
D. Blind Spot |
E. Color Blindness |
F. Afterimages |
The ______________ of a surface position on Earth can be defined as the angular measurement, in degrees, north or south of the equator
Fill in the blank(s) with correct word
A rectangular stack of lead bricks measures 2 m by 3 m by 4 m. The mass density of lead is 11,340 kilograms per cubic meter. What is the total mass of the stack of lead?