It takes 20.0 s for a exponentially damped harmonic oscillator to have its amplitude decrease from its initial value to one-half the initial value
How long does it take the amplitude to decrease from its initial value to one-fourth the initial value?
A)
40.0 s
B)
60.0 s
C)
50.0 s
D)
80.0 s
E)
30.0 s
A
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twice a day such that the Sub rises in the West and sets in the East. once a day such that the Sun rises in the East and sets in the West. twice a day such that the Sun rises in the East and sets in the West. once a day such that the Sun rises in the West and sets in the East.
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A) 1.4 B) 2.5 C) 3.6 D) 5.2 E) 7
When water of mass m and specific heat c is heated from absolute temperature T1 to absolute temperature T2, its change in entropy is
a. cm ln(T2/T1) b. cm (T2/T1) c. cm (T2 ? T1)/T1 d. cm (T2 ? T1)/T2 e. cm (T2 ? T1)/(T2 + T1)
The angular resolution of the eye is about 5 × 10-4 rad. The Moon is about 400,000 km from the earth and has a diameter of about 3500 km. What is the smallest feature on the Moon that can be resolved with the unaided eye?
A) 400 km B) 1000 km C) 100 km D) 1.8 km E) 200 km