One of the advantages of charge-coupled devices over photographic plates is that a CCD can record bright and faint objects on the same exposure
a. True
b. False
Indicate whether the statement is true or false
True
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The cosmic microwave background gives us a view of the universe when it was
A) 380,000 years old. B) 14 billion years old. C) about 1 million years old. D) 3-5 minutes old.
A bullet shot straight up returns to its starting point in 10 s. What is the initial speed of the bullet, assuming negligible air resistance?
A) 9.8 m/s B) 25 m/s C) 49 m/s D) 98 m/s
The lowest energy level of an atom (n = 1) is called the ______________
Fill in the blank(s) with correct word
Why is the chemical evolution model preferred by scientists over other theories for the origin of life on Earth?
A) it is the theory that best fits the available data B) because we have been able to create Life in the laboratory C) because it was written down in ancient scriptures D) because the other theories have been shown to be incorrect