Remember Kepler's third law, which relates the period of revolution to the average distance to a planet. How do we modify that law to use with binary stars?
a. Add the total mass of the two stars
b. Add Newton's Law of Gravitation.
c. Add Einstein's Law of Relativity.
d. Add the difference of their masses.
e. Add the distance between the two stars.
a
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In a double-slit experiment, the intensity of light at the center of the central fringe is measured to be 6.2 × 10-6 W/ m2. What is the intensity halfway between the center of the fringe and the first dark band?
A) 6.2 × 10-6 W/ m2 B) 3.1 × 10-6 W/ m2 C) 4.7 × 10-6 W/ m2 D) 1.6 × 10-6 W/ m2 E) 0.12 × 10-6 W/ m2
Paradoxically, while the core of the red giant is contracting and heating up, its radiation pressure causes its photosphere to swell up and cool off
Indicate whether the statement is true or false
How many alpha particles are emitted in the series of radioactive decay events from a U-238 nucleus to a Pb-206 nucleus?
A) 32 B) 16 C) 8 D) 4
You throw a baseball horizontally, and Jill catches it. Neglect air resistance. The energy transformation that occurs during the catch is
A) kinetic E ? thermal E. B) thermal E ? kinetic E. C) kinetic E ? chemical E. D) chemical E ? kinetic E. E) chemical E ? gravitational E.