Constant Acceleration Kinematics: Assuming equal rates of uniform acceleration in both cases, how much further would you travel if braking from 56 mi/h to rest than from 28 mi/h?
A. 4 times farther
B. 3.2 times farther
C. 4.8 times farther
D. 5.2 times farther
Answer: A
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The reason that most extrasolar planets are found close to their parent stars is
A) the planets reflect more light the closer they are to the star. B) more of the starlight is blocked by the planet when it transits the star. C) the amount and frequency of the star's motion are both higher. D) the closer to a star, the hotter and therefore brighter the planet is. E) planets that are close to a star are heated up and therefore larger.
A mixture of light and heavy molecules make up a sample of gas. If the temperature of the gas is constant, then all the molecules have the same average
A) speed. B) kinetic energy. C) both of these D) none of the above
The lowest energy level of a certain quantum harmonic oscillator is 5.00 eV. What is the energy of the next higher level?
A) 15.0 eV B) 7.50 eV C) 10.0 eV D) 50.0 eV E) 20.0 eV
Why are paths of the alpha particles deflected by the nucleus in this figure?
a. They bounce off each other just like billiard balls do. b. Because of the electrostatic repulsion of particles with the same sign of charge. c. This is predicted by Thomson's plum pudding model of the nucleus. d. Because electrons outside the nucleus are repelling the alpha particle. e. Because of the forces holding the protons and neutrons together inside the nucleus.