The ? ring eccentricity seems to be caused by the eccentric orbits of Ophelia and Cordelia around Jupiter

a. True
b. False
Indicate whether the statement is true or false


False

Physics & Space Science

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The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states involved in laser action? (c = 2.9979 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.6022 × 10-19 J)

A) 1.537 eV B) 1.646 eV C) 1.786 eV D) 1.812 eV E) 3.572 eV

Physics & Space Science

Radioactive Decay: A radioactive substance containing 4.0 × 1016 unstable atoms has a half-life of 2.0 days. What is its activity (in curies, Ci) after 1.0 day? (1 Ci = 3.70 × 1010 Bq)

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

An object is dropped from a bridge. A second object is thrown downwards 1.0 s later. They both reach the water 20 m below at the same instant. What was the initial speed of the second object? Neglect air resistance

A) 21 m/s B) 9.9 m/s C) 20 m/s D) 15 m/s E) 4.9 m/s

Physics & Space Science

Planets detected via the Doppler technique have been mostly

A) a wide range of masses, in edge-on orbits. B) Earth-mass, in Earth-like orbits. C) Jupiter-mass, in very close orbits. D) Earth-mass, in very close orbits. E) Jupiter-mass, in Jupiter-like orbits.

Physics & Space Science