The arrow in the photo on the left points to the location of the star that has exploded as a supernova in the photo on the right. Suppose you had looked with your naked eye at the supernova on the night it was photographed in the "during/after" photo. Assuming that it was bright enough to see (it was), what would it have looked like to your naked eye?
A) like a single star in the night sky
B) like a huge white blob, about the angular size of the full Moon but not quite as bright
C) like a reddish cloud spread out over a region of the sky about half the angular size of the full moon
D) like a pulsating bright light, dimming and brightening about every 5 minutes
A) like a single star in the night sky
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Globular clusters can be used to estimate the distance to galaxies by measuring the clusters' ____
a. angular diameter b. mass c. orbital speed d. age e. recession velocity
Which of the following nuclear fuels does a one-solar-mass star fuse over the course of its entire evolution?
a. hydrogen b. hydrogen and helium c. hydrogen, helium and carbon d. hydrogen, helium, carbon, and neon e. hydrogen, helium, carbon, neon, and oxygen
When a moving automobile stops for a stoplight, its kinetic energy
a. completely disappears. b. is converted to thermal energy. c. is transferred to the pavement. d. is stored in the automobile's battery. e. is stored in a flywheel.
What would the formula be for the following stick model?
A) C4H10 B) C3H3 C) C3H6 D) C3H8 E) C4H8