Measured densities of extrasolar planets range from ________
A) water to iron B) styrofoam to iron C) styrofoam to water
B
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The values of n and ? for a 4f subshell are
A) n = 4, ? = 4. B) n = 4, ? = 3. C) n = 3, ? = 3. D) n = 4, ? = 2. E) n = 3, ? = -3.
Thermal Expansion: The coefficient of linear expansion of copper is 17 × 10-6 K-1 and that of steel is 12 × 10-6 K-1. At 12°C a steel rod has a diameter of 2.540 cm and a copper pipe has a diameter of 2.536 cm. Which one of the following quantities is closest to the temperature to which the copper pipe must be heated in order for the unheated steel rod to fit snugly in the copper pipe?
A. 53°C B. 81°C C. 93°C D. 105°C E. 143°C
The total number of comets orbiting the Sun is estimated to be about
A) 1 trillion. B) 1,000. C) 100,000. D) 1 million.
Compared to the total energy available to support life on Earth, the total energy available to support life in a Europan ocean would be
A) about the same B) much larger C) slightly larger D) much smaller