The amplitude of a linearly damped harmonic oscillator decreases from 60.0 cm to 40.0 cm in 10.0 s. What will be the amplitude of the harmonic oscillator after another 10.0 s passes?
A)
20.0 cm
B)
16.7 cm
C)
30.0 cm
D)
0.00 cm
E)
26.7 cm
A
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A swimmer swims 20 laps in a north-south facing pool in 7.00 minutes. Her first lap is toward the north. Her displacement and average velocity are
a. 0; 0. b. 0; 2.38 m/s, south. c. 0; 2.38 m/s, north. d. 1 000 m, south; 2.38 m/s, south. e. 1 000 m, north; 2.38 m/s, north.
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Fill in the blank(s) with the appropriate word(s).
Which event occurred at a redshift around 1100?
a. big bang b. inflation c. CMB d. first stars formed
If a star is over ________ solar masses, its core can collapse to a black hole in a hypernova
A) 1.4 B) 3 C) 8 D) 25 E) 100