A newly discovered asteroid of the Aten family is found to be 50% closer to the Sun than the Earth is. Given this, how much sunlight does it receive compared to the Earth?
A) half as much
B) four times as much
C) twice as much
D) about the same
B
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What type of bond is formed whenever atoms share a pair of electrons?
a. covalent b. hydrogen c. ionic d. double e. peptide
Molecular Speeds: The molecular weight of nitrogen, N2, is 28 g/mol. What is the rms speed of nitrogen molecules in a cooler at 8.0°C? The Boltzmann constant is 1.38 × 10-23 J/K and NA = 6.022 × 1023 molecules/mol.
A. 450 m/s B. 500 m/s C. 550 m/s D. 600 m/s E. 650 m/s
Which of the following black holes has the largest event horizon? (Ignore any effects of rotation.)
A) a 5 solar mass black hole B) a 10 solar mass black hole C) All black holes have the same size event horizon.
The problem with visual observations of our Galaxy is the luminous gas haze
Indicate whether the statement is true or false