The sound intensity level 5.0 m from a point source is 95 dB. At what distance will it be 75 dB?
A) 225 m B) 75 m C) 25 m D) 50 m
D
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Whose geocentric model of the Universe dominated astronomy for 2,000 years?
a. Kepler b. Copernicus c. Aristotle d. Galileo e. Ptolemy
The ________ hypothesis is that the Earth does not occupy any special place in the universe
A) Galilean B) Pythagorean C) Aristotelian D) Copernican E) Ptolemaic
Two point charges each have a value of 35.5 mC and are separated by a distance of 4.0 cm. What is the electric field midway between the two charges? (ke = 8.99 × 10^9 N·m2/C2)
a. 7.1E+8 N/C b. 3.5E+8 N/C c. 1.8E+8 N/C d. zero e. 2.0E+8 N/C
System 1 is 3.1 moles of a monatomic ideal gas held at a constant volume of 2.70 L as it undergoes a temperature increase. System 2 is 3.1 moles of a diatomic ideal gas held at a constant volume of 2.7 L as it undergoes a temperature increase equal to the temperature increase of System 1 . The pressure increase for system 1 is ?P1 and for System 2 is ?P2 during the temperature increases. What
is the ratio of ?P1/?P2? a. 1.0 b. 0.60 c. 1.7 d. 2.5 e. 4.5