What is to the proper number of significant figures?
A) 0.91
B) 0.911
C) 0.9108
D) 0.9
A
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Which reason best explains why both Venus's and Mars's atmospheres are primarily carbon dioxide, but Earth's is much less than 1% carbon dioxide?
A. Each planet has a significantly different surface temperature. B. Venus and Mars, being smaller than Earth, can't retain the same mixture of gases as Earth. C. Earth's rocks had much less carbon and oxygen in them. D. Plant life has existed on Earth for an extended amount of time.
Which statement about gamma ray bursters is NOT correct?
A) Millisecond flickering implies they are tiny in size. B) In seconds, they radiate enormous amounts of energy. C) They seem to be coming from far beyond our own Milky Way. D) They are scaled up X-ray bursters, with more massive objects involved. E) The beams may be bipolar ejections from the hypernova formation of black holes.
A neutron has a mass of 1.67 × 10^?27 kg. Its de Broglie wavelength is 1.4 × 10^?10 m. What is its kinetic energy (in eV)?
a. 4 b. 0.4 c. 0.04 d. 40 e. 0.08
The solid, nonliving part of the Earth is the
What will be an ideal response?