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HW 20 problem

HW 20 problem - song(shs546 Homework 20 weathers(22202 This...

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song (shs546) – Homework 20 – weathers – (22202) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0points The magnetic field amplitude of an electro- magnetic wave is 1 . 8 × 10 - 6 T. The speed of light is 2 . 99792 × 10 8 m / s . Calculate the amplitude of the electric field if the wave is traveling in free space. Answer in units of N / C. 002 10.0points Gamma-ray bursters are objects in the uni- verse that emit pulses of gamma rays with high energies. The frequency of the most en- ergetic bursts has been measured at around 3 . 0 × 10 21 Hz. The speed of light is 3 × 10 8 m / s. What is the wavelength of these gamma rays? Answer in units of m. 003(part1of4)10.0points A cylindrical filament has radius 2 . 57 mm. Its resistance is 0 . 551 Ω and its length is 1 . 95 m. The filament carries a uniform, steady current of 0 . 161 A. The permeability of free space is 4 π × 10 - 7 N / A 2 .

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HW 20 problem - song(shs546 Homework 20 weathers(22202 This...

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