Granulation is caused by
a. sunspots.
b. rising and sink gases below the photosphere.
c. shock waves in the corona.
d. the solar wind flowing away from the corona.
e. the heating in the chromosphere.
B
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A 0.40-kg mass attached to the end of a string swings in a vertical circle having a radius of 1.8 m. At an instant when the string makes an angle of 40 degrees below the horizontal, the speed of the mass is 5.0 m/s. What is the magnitude of the tension in the string at this instant?
a. 9.5 N b. 3.0 N c. 8.1 N d. 5.6 N e. 4.7 N
The time interval of 365.242 days is defined as the ________
Fill in the blank(s) with correct word
Which best describes a system made up of ice, water, and steam existing together?
a. absolute zero c. ice point b. triple point d. steam point
What is the likely cause of the haze seen in photographs of Pluto's atmosphere taken by the New Horizons spacecraft?
A) ice particles erupting from geysers on Pluto's surface B) hydrocarbon molecules captured from passing comets C) condensation on the camera lens D) ultraviolet solar radiation breaking down methane and nitrogen molecules