Why is the bright yellow disk of the Sun, the photosphere, cooler than the areas both above and below it?
What will be an ideal response?
The photosphere radiates light which carries away energy
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You find a coin resting on your physics book cover and notice that when you open the cover, the coin slips exactly when the cover reaches 25 degrees above the horizontal. What is the coefficient of friction between the coin and book cover?
A. 0.20 B. 0.23 C. 0.37 D. 0.47 E. The question cannot be answered without knowing the coin's mass.
The Milky Way Galaxy is alone, that is, not a part of a group or cluster
a. True b. False Indicate whether the statement is true or false
Tides are approximately 24 hours apart
Indicate whether the statement is true or false
At Earth's surface what is the direction of the air flow between a high- and low-pressure cell? What is the direction aloft?