What do sunspots, solar prominences, and solar flares all have in common?
A) They all occur only in the Sun's photosphere.
B) They are all shaped by the solar wind.
C) They are all strongly influenced by magnetic fields on the Sun.
D) They all have about the same temperature.
C
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The second stage of planetary evolution is _____
A) cratering and giant basin formation B) ozone layer formation C) differentiation D) slow surface evolution
In the upper atmosphere at altitudes where commercial airlines travel, we find extremely cold temperatures. What is the speed of sound (in metric units) for a temperature of -53.0 oC?
Write the equation of a wave, traveling along the +x axis with an amplitude of 0.02 m, a frequency of 440 Hz, and a speed of 330 m/sec
a. y = 0.02 sin [880?(x/330 ? t)] b. y = 0.02 cos [880? x/330 ? 440t] c. y = 0.02 sin [880?(x/330 + t)] d. y = 0.02 sin [2?(x/330 + 440t)] e. y = 0.02 cos [2?(x/330 + 440t)]
Estimate the thermal conductivity of platinum at -10ºC if its electrical conductivity is 6 x 10^7 mhos/m, based on the Wiedemann-Franz law. Note: 1 mho = 1 amp/volt = 1 coulomb/volt-s, 1 W = 1 J/s = 1 volt-coulomb/s.
What will be an ideal response?