You do not need to know anything about electromagnetism to solve this problem. Electric forces and magnetic forces are different things, but they are related. Both of them act on electric charges, and the SI unit of electric charge is the coulomb, abbreviated C. Electric forces are proportional to the constant ke where ke = 9 x 109 (kg m3ms2 c2) Magnetic forces are proportional to the constant km where km = 2 x 10'7 (kg mmczg 1) Often when electric fields and magnetic fields come together, they move. Combine only those two constants {ke and h\") to come up with a speed in kmfs, and thus estimate the speed with which these fields travel. Do not look up the exact value of this speed. The exact value will be counted wrong. There is only one way to combine those two constants (and only those two constants) to come up with a speed and your answer must be within 10% of that speed. (Also check the units on your answer.) kme Submit 2) Impedance is a property of electrical systems. In electric circuits it is related to the resistance of the circuit, but it has meaning in empty space as well (where the meaning is very different). Impedance is measured in units called ohms where 1 ohm = 1 (kg mz)i{s c2) Combine only the two constants {ke and kl\") to come up with an impedance in ohms, and thus estimate the impedance of empty space. Do not look up the exact value of this impedance. The exact value will be counted wrong. There is only one way to combine those two constants (and only those two constants) to come up with an impedance and your answer must be within 10% of that impedance. ohms submit 3) Your answers to questions 1 and 2 are good examples of the kind of accuracy we get by using dimensional analysis alone. Our estimates are a lot better than guesses. They are usually within a factor of 10, but they are seldom exact. You might have guessed that your answer to problelm 1 is an estimate of the speed of light (but it is completely okay if you did not suspect this). How accurate was your estimate in problem 1? In other words, what is the value of (speed estimated by dimensional analysis)! (the physical speed of light in a vacuum) ? (I10 Uf'l'il'S} Submit 4) Your answer to problem 2 was an estimate of the \"impedance of free space\" based only on dimensional analysis. How accurate was that estimate? In other words, look up the masured value of the physical constant and what was the value of {impedance estimated by dimensional analysis)f{impedance of free space) '2' {I10 units) Submit