A pendulum of length L is suspended from the ceiling of an elevator. When the elevator is at rest the period of the pendulum is T
How would the period of the pendulum change if the supporting chain were to break, putting the elevator into freefall? A) The period does not change.
B) The period increases slightly.
C) The period decreases slightly.
D) The period becomes zero.
E) The period becomes infinite because the pendulum would not swing.
E
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Based on the H-R diagram shown above, about how long does a main-sequence star of spectral type O spend fusing hydrogen into helium in its core?
A) 1000 years B) 10,000 years C) 10 million years D) 100 million years E) 1 billion years
Each of two small non-conducting spheres is charged positively, the combined charge being 40 ?C. When the two spheres are 50 cm apart, each sphere is repelled from the other by a force of magnitude 2.0 N. Determine the magnitude of the smaller of the two charges
a. 1.4 ?C b. 1.1 ?C c. 2.0 ?C d. 3.3 ?C e. 17 ?C
Why is carbon dioxide important in maintaining a greenhouse effect?
What will be an ideal response?
In heat transfer, the heat flux is directly related to the temperature _____________.
Fill in the blank(s) with the appropriate word(s).