The magnetic field of an electromagnetic wave has a peak value of 5.0 × 10-10 T
What is the intensity of the wave? (c = 3.0 x 108 m/s, c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2)
A) 1.0 × 10-13 W/m2
B) 1.5 × 10-5 W/m2
C) 3.0 × 10-5 W/m2
D) 2.0 × 10-13 W/m2
E) 7.5 × 105 W/m2
C
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A) about the same B) just slightly less C) much smaller D) much larger
Regional metamorphism causes a parallel arrangement of mineral grains that results in a pronounced layering of the rock. The layering is known as ______________
Fill in the blank(s) with correct word
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A) uranium-238. B) uranium-235. C) potassium-40. D) carbon-14.
Two speakers are emitting coherent sound waves at a frequency of 440 Hz. If the speed of sound is 343 m/s, and it is observed that no sound is heard a distance of 17.2 m from one speaker, which of the following is a possible distance to the second speaker?
A. 14.6 m B. 17.2 m C. 19.6 m D. 18.8 m E. 16.5 m F. 18.0 m