Which of the following best describes the axes of a Hertzsprung-Russell (H-R) diagram?
A) surface temperature on the horizontal axis and luminosity on the vertical axis
B) mass on the horizontal axis and luminosity on the vertical axis
C) surface temperature on the horizontal axis and radius on the vertical axis
D) mass on the horizontal axis and stellar age on the vertical axis
E) interior temperature on the horizontal axis and mass on the vertical axis
A) surface temperature on the horizontal axis and luminosity on the vertical axis
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Why are Moon rocks older than Earth rocks, if the impact theory has the Moon being made by another body striking the newly formed Earth?
What will be an ideal response?
Exhibit 17-1
The figure below shows a sine wave at one point of a string as a function of time.
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Use the exhibit to answer the following question(s).
Refer to Exhibit 17-1. Which of the graphs below shows a wave where the amplitude and frequency are each reduced in half?
A.
B.
C.
D.
E.
When a capacitor is fully charged, the current through the capacitor in a direct-current circuit is
a. zero. b. at its maximum value. c. equal to the current in a resistive circuit in parallel with the capacitor circuit. d. greater than the current in a resistor that is farther from the battery than the capacitor. e. zero if it is the only capacitor, but maximum if there is another capacitor in series with it.
The period of oscillation of a near-Earth satellite (neglecting atmospheric effects) is 84.3 min. What is the period of a near-Moon satellite? (RE = 6.37 × 10^6 m; RM = 1.74 × 10^6 m; ME = 5.98 × 10^24 kg; MM = 7.36 × 10^22 kg.)
a. 6.03 × 10^-3 min. b. 0.713 min. c. 84.3 min. d. 108 min. e. 140 min.