The speed of sound in the air inside a 0.640-m long gas column is 340 m/s. What is the fundamental resonant frequency of this air column if it is (a) open at one end and closed at the other end? (b) open at both ends?
What will be an ideal response?
(a) 133 Hz (b) 266 Hz
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A 100-g cube of ice is heated from ?120°C to +120°C. In which of the following processes is the greatest amount of energy absorbed by this material?
a. warming ice to the melting point b. melting the ice to become water c. warming the resulting water d. vaporizing the water to become steam e. heating the steam
A flat rectangular coil with dimensions of 8.0 cm × 10 cm is dropped from a zero magnetic field position into a 1.4-T magnetic field in 0.10 s
The coil has 60 turns and is perpendicular to the magnetic field. What is the average induced emf in the coil as a result of this action? A) 8.6 V B) 2.4 V C) 6.7 V D) 3.6 V E) 0 V
In _________fracture, the fracture surface follows the grain boundaries.
Fill in the blank(s) with the appropriate word(s).
If the magnitude difference between one star and another is 5, the stars differ in brightness by a factor of
a. 2.51. b. 10. c. 4. d. 100.