A transiting extrasolar planet is observed to block 1% of its host star's light. How does the size of this planet compare to the host star?
A) The planet's radius is 10% of the host star's radius.
B) The planet is the same size as the host star.
C) The planet's radius is 0.1% of the host star's radius.
D) The planet's radius is 1% of the host star's radius.
A
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The temperature of the mesosphere decreases from 0°C at the bottom to -90°C at the top. This change in temperature is a result of
A) a decrease in air pressure. B) low absorption of solar radiation—air molecules emit more energy than they absorb. C) low air density. D) all of these
Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in series with the previous lightbulbs, and again take note of the brightness. Repeat the process with the third lightbulb, connecting it in series with the other two. As the lightbulbs are added, the individual
currents in the lightbulbs (neglect the battery’s internal resistance) 1.increases. 2.decreases. 3.remains the same. 4.Need more information.
In a Young's double-slit experiment, what happens to the angular separation between the fringes when the wavelength is decreased at the same time that the slit separation is increased?
a. The relative sizes of the changes need to be known before a definite answer can be given. b. It increases. c. It decreases. d. It stays the same.
What is meant by the term FTP in tube boiling?
What will be an ideal response?