If a major asteroid collision in the asteroid belt occurs once every 100,000 years on average, then how many major collisions have occurred over the approximately 4.5 billion year history of the solar system?
A) about 45,000
B) about 4.5 million
C) about 4.5 billion
D) about 4500
A) about 45,000
Physics & Space Science
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The Milky Way Galaxy contains about ________ stars. Most of these stars are probably ________.
A. 100 billion; red giants B. 10 billion; white dwarfs C. 100 billion; cool dwarfs D. 100 billion; O and B type stars
Physics & Space Science
Which of the following is NOT an outer planet?
A. Uranus B. Pluto C. Jupiter D. Saturn E. Neptune
Physics & Space Science
Calculate the ground state energy (in eV) for an electron in a box (an infinite well) having a width of 0.050 nm
a. 10 b. 75 c. 24 d. 150 e. 54
Physics & Space Science
What is the evidence that a meteorite impact caused the great extinction at the end of the Mesozoic?
What will be an ideal response?
Physics & Space Science