Consider the standing wave on a guitar string and the sound wave generated by the guitar as a result of this vibration. What do these two waves have in common?
A) They have the same velocity.
B) They have the same wavelength.
C) They have the same frequency.
D) They have nothing in common.
C
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The volcanic activity of Enceladus has what effect outside the moon itself?
What will be an ideal response?
A new polymer is developed, and to characterize the electrical properties of the polymer, the capacitance is determined to be 20.36×10-13 F in a parallel-plate capacitor that has square plates with a side length of 10-2 m, and the thickness of the polymer sheet and the spacing between the plates is 10-3 m.
(a) What is the dielectric constant or relative permittivity of this new material? (b) If the capacitance measurement is made with an applied voltage of 10 volts, what is the magnitude of the polarization in the new polymer?
Which of the following gives direct information about the age of the solar system?
A) Martian meteorites B) meteorites from asteroidal debris C) the solar wind D) the oldest Martian basalts E) the oldest lunar basalts
At atmospheric pressure, 45 moles of liquid helium are vaporized at its boiling point of 4.22 K. The heat of vaporization of helium, at atmospheric pressure, is 2.09 × 104 J/kg,
and the atomic weight of helium is 4.00 g/mol. The change in the entropy of the helium, as it vaporizes, is closest to A) 890 J/K. B) 14,000 J/K. C) 18,000 J/K. D) -9400 J/K. E) -14,000 J/K.