If you run a complete loop around an outdoor track of length 400 m in 100 s, find your (a) average velocity and (b) average speed
What will be an ideal response?
(a) 0 m/s (b) 4 m/s
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Which of the following statements is FALSE?
A) In our universe, at earlier times, everything was closer together. B) The universe is expanding. C) For an observer located in a galaxy all other distant galaxies would appear to move away from his. D) The universe looks the same in all directions; i.e. it is homogeneous and isotropic. E) We are at the center of the universe.
How many times must a dip in the brightness of a star be seen in order to detect a planet with the transit technique?
A) 1 time B) 2 times C) 3 times D) 4 times
A feather and a coin will have equal accelerations when falling in a vacuum because
A) their velocities are the same. B) the force of gravity is the same for each in a vacuum. C) the force of gravity does not act in a vacuum. D) the ratio of both the feather's and coin's weight to mass is the same. E) none of the above
A diatomic molecule has 2.6 × 10-5 eV of rotational energy in the L = 2 quantum state. What is the rotational energy in the L = 1 quantum state?
A) 3.4 × 10-6 eV B) 4.1 × 10-6 eV C) 5.3 × 10-6 eV D) 7.8 × 10-6 eV E) 8.7 × 10-6 eV