The visible surface of the Sun is called the ______________
Fill in the blank(s) with correct word
photosphere
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A ball is thrown straight up with a speed of 30 m/s, and air resistance is negligible. (a) How long does it take the ball to reach the maximum height? (b) What is the maximum height reached by the ball? (c) What is its speed after 4.2 s?
What will be an ideal response?
A 25.0-g string is stretched with a tension of 43.0 N between two fixed points 12.0 m apart. What is the frequency of the second harmonic?
A) 6.00 Hz B) 12.0 Hz C) 18.0 Hz D) 24.0 Hz E) 36.0 Hz
Work-Energy Theorem: A 1000-kg car experiences a net force of 9500 N while slowing down from 30 m/s to 15.9 m/s. How far does it travel while slowing down?
A. 34 m B. 31 m C. 37 m D. 41 m
Which is more common: a star blows up as a supernova, or a star forms a planetary nebula/white dwarf system?
A) Supernovae are more common. B) Planetary nebula formation is more common. C) They both occur in about equal numbers. D) It is impossible to say.