If you double the length of each side of a cube, its surface area increases by what factor?
A. 2
B. 4
C. 6
D. 8
Ans: B. 4
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Satellite Motion: Europa, a satellite of Jupiter, has an orbital diameter of 1.34 × 109 m and a period of 3.55 days. What is the mass of Jupiter? (G = 6.67 × 10-11 N ? m2/kg2)
A. 1.53 × 1027 kg B. 1.65 × 1027 kg C. 1.07 × 1027 kg D. 1.89 × 1027 kg E. 3.08 × 1027 kg
Computer simulations and the huge structures observed in the universe support the ________ model of the universe
Fill in the blank(s) with correct word
Current searches for extraterrestrial intelligence use radio telescopes at wavelengths
a. which must be shorter than the local wavelengths emitted by Earth's atmosphere. b. which must be longer than the radio wavelength ‘noise' naturally emitted by our galaxy. c. which must be longer than the local wavelengths emitted by Earth's atmosphere and which must be shorter than the radio wavelength ‘noise' naturally emitted by our galaxy. d. Wrong! Visual light wavelengths are used because radio waves are blocked by dust between the stars.
In the context of binary stars, briefly explain visual binary system, spectroscopic binary system, and eclipsing binary system
What will be an ideal response?