If one sound is 20 dB louder than another sound, its intensity is
A. 2 times greater.
B. 20 times greater.
C. 100 times greater.
D. 200 times greater.
E. We need to know the actual sound level: 30 db to 50 db represents a different factor of intensity increase than 60 db to 80 db (for example).
C. 100 times greater.
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The process of combining signals from separate telescopes to improve resolution is called ____________________
Fill in the blank(s) with correct word
An Earth satellite in an elliptical orbit travels slowest when it is
A) nearest the Earth. B) farthest from the Earth. C) neither of these
Shown following are three terrestrial planets of our solar system. Rank the planets based on the amount of time the surface of the planet has had a moderate to high level of volcanic/tectonic activity, from longest to shortest.
A solid uniform sphere of mass 1.85 kg and diameter 45.0 cm spins about an axle through its center. Starting with an angular velocity of 2.40 rev/s, it stops after turning through 18.2 rev with uniform acceleration
The net torque acting on this sphere as it is slowing down is closest to A) 0.00593 N ? m. B) 0.0372 N ? m. C) 0.0466 N ? m. D) 0.0620 N ? m. E) 0.149 N ? m.