s1124 - m / s 2 . 5. If two very long parallel wires one...

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ADVANCED DYNAMICS — PHY 4241/5227 SOLUTIONS – SET 8 (24) SI Units. For up-to-date information visit the NIST website. 1. The second [s] is de±ned, so that the frequency of light between the two hyper±ne levels of the ground state of the cesium 132 Cs atom is exactly 9,192,631,770 cycles per second. 2. The meter [m[ is de±ned, so that the speed of light in vacuum is exactly 299,792,458 [m/s]. 3. A one kilogram weight is kept at S` evres near Paris. 4. 1 N = 1 kg
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Unformatted text preview: m / s 2 . 5. If two very long parallel wires one meter apart carry equal currents, the current in each is dened to be one Ampere [A] when the force per unit length on each wire is 2 10-7 [N/m]. 6. One Coulomb [C] is the charge owing through a cross-sectional area of a wire in one second when the current in the wire is one Ampere: C = A s. 7. = 4 10-7 N / A 2 . 8. = 8 . 85418782 10-12 C 2 / (N m 2 )....
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