If the intensity of a sound is increased by a factor of 100, how is the decibel level changed? The new decibel level will be:
a. two units greater.
b. double the old one.
c. ten times greater.
d. twenty units greater.
d
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Viscosity: Motor oil, with a viscosity of 0.25 N ? s/m2, is flowing through a tube that has a radius of 3.0 mm and is 1.0 m long. The drop in pressure over the length of the tube is 200 kPa. What is the average speed of the oil?
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Tycho Brahe's contribution to astronomy included:
a. Tycho Brahe's contribution to astronomy included: b. inventing the telescope. c. proving that Earth orbits the Sun. d. collecting data that enabled Kepler to discover the laws of planetary motion.
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