The Ekman transport spiral is driven
A) by density differences in the water column.
B) by gravity.
C) solely by the Coriolis force.
D) by the wind.
Answer: D
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An organ pipe closed at one end has a length of 60 centimeters. What is the wavelength of the second harmonic?
A. 20 cm B. 60 cm C. 80 cm D. 100 cm
The equation E = mc2 means that
A. mass and energy when combined travel at the speed of light. B. energy is really mass traveling at the speed of light squared. C. mass is really a bundle of energy traveling at the speed of light. D. energy and mass are different forms of the same thing. E. mass and energy when combined travel at twice the speed of light.
A Geiger counter is like an electroscope that discharges whenever ions formed by a radioactive particle produce a conducting path. A typical Geiger counter consists of a thin conducting wire of radius 0.002 cm stretched along the axis of a conducting cylinder of radius 2.0 cm. The wire and the cylinder carry equal and opposites charges of 8.0 × 10?10 C all along their length of 10.0 cm. What is the magnitude of the electric field at the surface of the wire?
What will be an ideal response?
A hair is placed at one edge between two flat glass plates. When this arrangement is illuminated with yellow light of wavelength (l = 600 nm), a total of 61 dark bands are counted starting at the point of contact between the plates. How thick is the hair? (1 nm = 10-9 m) Note that a dark band occurs where the plates contact
a. 3.6 × 10^-4 m c. 1.8 × 10^-5 m b. 1.8 × 10^-4 m d. 3.6 × 10^-5 m