Eras are divided first into
a. epochs.
b. millennia.
c. periods.
d. eons.
c
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The elapsed time between two successive crossings of the same meridian by the Sun is known as the ______________ solar day
Fill in the blank(s) with correct word
One of Tycho Brahe's major contributions to astronomy was to prove that ________ was ________.
A. a comet; outside Earth's atmosphere B. a supernova (exploding star); much farther away than the planets C. the Sun; the center of the solar system D. both A and B E. A, B, and C
Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C A 1 kg block of ice is removed from a freezer where its temperature was –10°C. The amount of heat absorbed by the ice as it warms to 0°C is 20,000 J
Indicate whether the statement is true or false
The Sun's life time is 10 billion years. About how long is the lifetime of a star with a star has a mass of 10 MSun and a luminosity of 10,000 LSun?
A) 1 million years B) 100 billion years C) 100 trillion years D) 10 million years