Which of the following techniques is not useful for determining the age of the universe?
d.
This statement is not true. The size of the Milky Way is not a technique for finding the age of the universe.
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Which of the following is true of Galileo Galilei?
A) He invented the telescope. B) He publically defended the geocentric model of the Universe. C) He was the first person to look at the sky through a telescope. D) He applied his careful observations of the sky to determine the place of Earth.
A changing electric field induces a changing
A) magnetic field. B) electromagnetic field. C) both of these D) neither of these
The main observable difference separating Type I and Type II supernovae is ____
a. neutrino emission b. iron absorption lines c. a difference in luminosity of several thousand times d. the presence or absence of hydrogen absorption lines e. the presence or absence of hydrogen emission lines
Molecular Rotation: A diatomic quantum mechanical oscillator has a moment of inertia of 7.73 × 10-45 kg ? m2. What is the rotational energy when it is in the quantum state characterized by L = 2? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A. 2.27 × 10-5 eV B. 2.70 × 10-5 eV C. 7.22 × 10-5 eV D. 8.71 × 10-5 eV