Which of the following statements does not use the term angular size or angular distance correctly?
A) The angular distance between those two houses in the distance is 30 degrees.
B) The angular distance between those two bright stars in the sky is about 2 meters.
C) The angular size of the Sun is about the same as that of the Moon.
D) You can use your outstretched hand against the sky to estimate angular sizes and angular distances.
B
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Beyond the formation of iron, nuclear energy can be produced only by
A) fusion of still heavier elements. B) ionization of the radioactive nuclei. C) fission of heavy nuclei back toward lighter ones. D) gravity. E) the dark force.
Estimate the number of pennies that would fit in a box one foot long by one foot wide by one foot tall
A) 5 × 102 B) 5 × 103 C) 5 × 104 D) 5 × 105 E) 5 x 106
Which of the following is an example of Heisenberg's uncertainty principle?
A) The unpredictability of radioactive decay. B) The unpredictability of a coin toss. C) Both of the above. D) The unpredictability of the weather. E) All of the above.
A 900-kg car traveling 30.0° south of east at 12.0 m/s suddenly collides with a 750-kg car traveling north at 17.0 m/s. The cars stick together after colliding. What is the speed of the wreckage just after the collision?
A) 7.21 m/s B) 12.2 m/s C) 20.4 m/s D) 25.0 m/s E) 17.3 m/s