In order for two waves to interfere completely destructively, they must
a. have the same amplitude.
b. be exactly out of phase.
c. one wave's peak must align with the other's valley.
d. be transverse waves.
e. all of the above
a, b, c
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A large substitutional atom is attracted to the region of an edge dislocation that has _________strains.
Fill in the blank(s) with the appropriate word(s).
The power expended for a barbell raised 2.0 m in 2 s is
A) 1 W. B) 4 W. C) 8 W. D) not enough information
If light in a spectroscope passed through round holes instead of slits, spectral lines would appear
A) as thicker lines. B) round. C) dimmer.
A string on a guitar is stretched between two points 35.0 cm apart with a tension of 65.0 N. The mass/length of the string is 0.00400 kg/m. The wavelength of the mode of vibration with the lowest frequency is
A. 0.5 m. B. 0.6 m. C. 0.7 m. D. 0.8 m. E. 0.9 m.