The ________ on the edges of the continents come from subduction of oceanic basalt beneath the advancing continental plate
Fill in the blank(s) with correct word
trenches
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To demagnetize a ferromagnetic metal, heat it to above the _________temperature in the absence of a magnetic field.
Fill in the blank(s) with the appropriate word(s).
________ is the process of stripping electrons from their atoms
Fill in the blank(s) with correct word
Diffraction grating ?1 has half the lines/cm that diffraction grating ?2 does. When used with a certain wavelength of light, both gratings give first-order maxima. Which of the following statements is true for the same wavelength of light
a. Both gratings must also give second-order maxima. b. Grating ?1 must give a second-order maximum. c. Grating ?2 must give a second-order maximum. d. It is possible that neither grating gives a second-order maximum.
The speed of FM waves will be observed to be c = 2.9979 × 10^8 m/s when the antenna emitting the waves is
a. at rest relative to the receiving antenna. b. moving to the right of the detecting antenna at 0.5c. c. moving to the left of the detecting antenna at 0.5c. d. moving as described in (a), (b) or (c) above. e. moving at 2.9979 × 10^8 m/s.