12/14/2023 0 Comments Parsec unit of timeWe use arc minutes, Parkman's and arc that can are, humans are 1/60 of a degree And arc seconds are one 60 times 60 freeze, which is one over 3600 degrees. It used a huge amount bob obviously in a usually in angles we use degrees, so that usually goes up to obviously one degree, but then going down past one degree, we don't, we don't say For example, not. Now one second of art, it's probably, you've probably not heard of. So out of distant X, why would cover some angles? So in this case um it says that one day you would sub tendered angle of one second of arc at one par sec. It means that if we had, sorry if I said ex sorry if I said why sub tended the angle of X would mean that why sub tended or basically covered some angle theater um over um a distance X. So if you don't really understand what some of those words mean, there's something to sub tend the angle of something. Now for a possible, he said that the parsing is the distance at which one a you would sub tendon angle of one second of arc. So for party we know that the au is 1.5 times 10 to the kilometers. So it says a parcel is the distance at which one a you would sub tend an angle of one second of arc and a light year is the distance light traveling through the vacuum with the speed of three times to the five kilometers per second would cover in a year apart A we need to express the distance from the earth and the sun is the in parsecs and light years and for part B expressed a light a light years to parsecs in kilometers. 21 from Chats, one of the physics 5th book Question asks us about astronomical units which are 1.5 times 10 to the eight km and parsecs and light years and how they relate to each other. A new instrument.So we're gonna be looking at problem.
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