All the planets, asteroids, comets, and most of the moons in the Solar System formed at about the same time.
Answer the following statement true (T) or false (F)
True
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A meson is a subatomic “particle” consisting of a quark–antiquark pair. Suppose we have a meson consisting of an up quark and a much more massive bottom antiquark. The interaction between these point-like quarks is purely attractive, like that between oppositely charged particles. Which of the idealized models in this chapter might best describe this system’s possible energy values?
A. The quanton in a box model B. The Bohr model C. The simple harmonic oscillator model
A father and his young daughter are on very clean ice, so there is very little friction (the father has more mass than the daughter). The father pushes his daughter forward and she slides away at a speed of 3 m/s. The father's velocity is
A. 3 m/s in the same direction as his daughter. B. zero. C. 3 m/s in the opposite direction as his daughter. D. smaller than 3 m/s in the opposite direction as his daughter. E. smaller than 3 m/s in the same direction as his daughter.
At t = 0 the switch S is closed with the capacitor uncharged. If C = 40 ?F, ? = 50 V, and R = 5.0 k?, how much energy is stored by the capacitor when I = 2.0 mA?
a.
20 mJ
b.
28 mJ
c.
32 mJ
d.
36 mJ
e.
40 mJ
A 60.0-kg person rides in an elevator while standing on a scale. The scale reads 400 N. The acceleration of the elevator is closest to
A) 3.13 m/s2 downward. B) 6.67 m/s2 downward. C) zero. D) 9.80 m/s2 downward. E) 6.67 m/s2 upward.