Given that the binding energy of the hydrogen atom in its ground state is -13.6 eV, what is the energy when it is in the n = 5 state?
A) -2.72 eV B) 0.544 eV C) -0.544 eV D) 2.72 eV
C
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An asteroid exerts a 360-N gravitational force on a nearby spacecraft. The 360-N force on the spacecraft is directed
A) toward the asteroid. B) away from the asteroid. C) toward the Sun.
Will our Sun ever undergo a white dwarf supernova explosion? Why or why not?
A) No, because the Sun's core will never be hot enough to fuse carbon and other heavier elements into iron. B) Yes, about a million years after it becomes a white dwarf. C) Yes, right at the end of its double-shell burning stage of life. D) No, because it is not orbited by another star.
______________ is the only moon in the solar system to have retrograde motion
a. Ganymede b. Europa c. Callisto d. Titan e. Triton
A 7.0-kg bowling ball strikes a 2.0-kg pin. The pin flies forward with a velocity of 6.0 m/s; the ball continues forward at 5.0 m/s. What was the original velocity of the ball?
a. 4.0 m/s c. 6.7 m/s b. 5.7 m/s d. 3.3 m/s