If the Sun suddenly turned off, we would not know it until its light stopped coming. How long would that be (in s), given that the Sun is 1.50 x 10" m away?
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- A state highway patrol car radar unit uses a frequency of8.00 * 109Hz. What frequency difference will the unit detect froma car receding at a speed of 64.5 m>s from a stationary patrol car?The maximum magnetic field strength of an electromagnetic field is 9 ✕ 10−6 T. Calculate the maximum electric field strength (in kV/m) if the wave is traveling in a medium in which the speed of the wave is 0.68c.EXAMPLE 31-5. Phone call time lag. You make a telephone call from New York to a friend in London. Estimate how long it will take the electrical signal generated by your voice to reach London, assuming the signal is (a) carried on a telephone cable under the Atlantic Ocean, and (b) sent via satellite 36,000 km above the ocean. Would this cause a noticeable delay in either case?
- Show that ε and dΦm /dt have the same units.Problem 24.04. If the Sun suddenly turned off, we would not know it until its light stopped coming. How long would that be, given that the Sun is 1.50 × 108 km away?T31. (A) Find the peak magnetic field in an electromagnetic wave whose peak electric field is Emax. (B) Find the peak electric field in an electromagnetic wave whose peak magnetic field is Bmax. Data Emax = 280 V/m; Bmax = 47 nT; ]
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