The fundamental frequency of a above middle C on the piano is 440 Hz. This is the tenor high A, but a convenient note in the mid-range of women's voices. When we calculate the wavelength, we find that it is
a. much shorter than the length of either a man's or woman's lips.
b. shorter than the length of a man's lips, but about the length of a woman's lips.
c. longer than a woman's lips, but about the length of a man's lips.
d. much longer than the length of either a man's or a woman's lips.
e. about the same length as either a man's or woman's lips.
D
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What is the force on the magnet that results from the motion shown in this figure?
a. Directly downward. b. Directly upward. c. Zero. d. The result is a torque twisting the magnet around its length. e. To the right.
Three loops of wire, one circular, one rectangular, and one square, are made from identical lengths of wire. If the loops are in the same increasing magnetic field perpendicular to the plane of the coils, which loop has the greatest induced emf?
a. the circular one b. the rectangular one c. the square one d. All three would have the same emf induced.
What drives the motion of the continental plates on Earth?
A) lava flows in trenches along the sea floor B) tidal forces C) convection cells in the mantle D) Earth's magnetic field E) rotation of the liquid core
An electron (m = 9.1 × 10^?31 kg) has a speed of 0.90 c. What is the difference between its relativistic momentum and its non-relativistic momentum (in kg m/s)?
a. 4.3 × 10^?22 b. 3.2 × 10^?22 c. 5.4 × 10^?22 d. 6.5 × 10^?22 e. 2.5 × 10^?22