After a rain, one sometimes sees brightly colored oil slicks on the road. These are due to
A) interference effects.
B) polarization effects.
C) diffraction effects.
D) selective absorption of different wavelengths by oil.
E) birefringence.
A
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Indicate whether the statement is true or false
A 0.25-m string, vibrating in its sixth harmonic, excites a 0.96-m pipe that is open at both ends into its second overtone resonance. The speed of sound in air is 345 m/s. The common resonant frequency of the string and the pipe is closest to
A) 540 Hz. B) 360 Hz. C) 450 Hz. D) 630 Hz. E) 700 Hz.
A tiny spring, with a spring constant of 1.20 N/m, will be stretched to what displacement by a 0.0060-N force?
a. 4.2 mm c. 6.0 mm b. 5.0 mm d. 9.4 mm
The boat to make the fastest progress in its forward direction is boat
1) 1. 2) 2. 3) 3. 4) 4. Boat 3 is not propelled in a forward direction because 5) the wind does not make impact with the sail. 6) there is no component of force parallel to the keel. 7) of air resistance on the front of the sail. 8) But it is propelled in a forward direction!