The wavelength of a wave is
A) the distance between a peak of the wave and the next trough.
B) the distance between two adjacent peaks of the wave.
C) the distance between where the wave is emitted and where it is absorbed.
D) how strong the wave is.
E) equal to the speed of the wave times the wave's frequency.
B
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Regarding the Earth and a cloud layer 800 m above the Earth as the "plates" of a capacitor, calculate the capacitance if the cloud layer has an area of 1.0 km2. If an electric field of 2.0 × 106 N/C makes the air break down and conduct electricity (lightning), what is the maximum charge the cloud can hold?
What will be an ideal response?
A rock is sinking to the bottom of the lake. The buoyant force is greater at point
1) A. 2) B. 3) C. 4) equal at all levels. This follows from the fact that 5) pressure increases with depth. 6) the same weight of water is displaced at any depth. 7) the water is appreciably more compressed with increasing depth. 8) position B provides a moderate answer, between the extremes.
A certain transformer doubles input voltage. If the primary coil has 10 A of current, then the current in the secondary coil is
A) 2 A. B) 5 A. C) 10 A. D) 25 A. E) none of the above
If you are 5'10'' tall, what is your height in meters? (2.54 cm = 1.00 in.)
A) 1.5 m B) 1.6 m C) 1.7 m D) 1.8 m