In age, Galactic disk stars are typically much ________ than those of the Galactic halo
Fill in the blank(s) with correct word
younger
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Energy in Capacitors: Two parallel plates that are initially uncharged are separated by 1.7 mm, have only air between them, and each have surface areas of 16 cm2. How much charge must be transferred from one plate to the other if 1.9 J of energy are to be stored in the plates? (?0 = 8.85 × 10-12 C2/N ? m2)
A. 5.6 ?C B. 4.0 ?C C. 8.0 ?C D. 0.60 mC
Answer the following statement(s) true (T) or false (F)
1. Initially, the light puck was moving south and the final speed of the conjoined pucks is zero. The original velocity of the heavy puck must have been northward
Kepler's second law, which states that as a planet moves around its orbit it sweeps out equal areas in equal times, means that
a)planets have circular orbits b)planets period does not depend on the eccentricity of its orbit c)a planet travels faster when it is nearer to the Sun and slower when it is farther from the Sun
The formula mass of Na2S is
a. 55.1 u. b. 30.1 u. c. 78.1 u. d. 57.1 u.