This graph shows the number of asteroids with different orbital periods. Notice the gap indicated by the downward-pointing black arrow. What does this graph tell us about this gap?
A) There are few if any asteroids at the indicated orbital period of about 4 years.
B) There are more asteroids concentrated at the orbital period indicated by the arrow than at any other orbital period.
C) Asteroids with an orbital period of about 4 years are all located very close together; so close that collisions occur frequently.
D) There are exactly 495 asteroids with an orbital period of 4 years.
A) There are few if any asteroids at the indicated orbital period of about 4 years.
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When an electrical switch is closed or opened in the vicinity of an operating AM radio, a burst of static can be heard. Which of the following, involving the throwing of the switch, would likely be the cause for this static?
a. The sound from the switching is the source of waves. b. Unnoticed lightning hits nearby every time the switch is thrown. c. Static happens without any cause. d. Electrons are accelerated during the switching process.
An electron passing close to a target nucleus slows and radiates away some of its energy. What is the process called?
A. blackbody radiation B. photoelectric effect C. stimulated emission D. bremsstrahlung E. Compton effect
What is the ratio of the pressure that a constant-volume gas thermometer registers at the boiling point of water to the pressure it registers at the freezing point?
A) 1.00 B) 1.24 C) 1.32 D) 1.37 E) 1.80
A flat rectangular coil with dimensions of 8.0 cm × 10 cm is dropped from a zero magnetic field position into a 1.4-T magnetic field in 0.10 s
The coil has 60 turns and is perpendicular to the magnetic field. What is the average induced emf in the coil as a result of this action? A) 8.6 V B) 2.4 V C) 6.7 V D) 3.6 V E) 0 V