PHYS 376 Lecture Notes - Lecture 2: Kilogram, Picometre, Nanometre
27 Jan 2017
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1 meter - distance light travels in 300,000,000 meters/second. The speed of light is a constant of nature (doesn"t change. ) In free space, it is a vacuum because the universe is mostly empty. 1 second is time when cesium-133 (microwave) atom has produced oscillation. ". Kelvin - 0k = temperature at which all motion in the universe will cease to death of the. Coulomb - unit of electric charge (electron) We are defined by our names but we are derived from nature". You start your car from rest and started your stopwatch (t = 0). Thirty seconds later your car"s speed is 70mph. Determine change in your speed per second and use si units for your answer. Change in speed = (70 - 0) = 70 mph. Change in speed in km/hr = 70 x 1. 6 = 112 km/hr. Change in speed in m/s = 112,000 m/hr = (112 x 1000)m = 112,000 = 31 m/s.
