Empiricism, objectivity and falsifiability are important scientific tenets. Together they tell us that
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1 Hmewrk 1! This is a preview f the draft versin f the quiz Started: Jan 27 at 9:12am Quiz Instruc!ns Questin 1 Empiricism, bjectivity and falsifiability are imprtant scientific tenets. Tgether they tell us that a valid view f reality makes a predictin that multiple peple can test with bservatins the mst cmplex descriptin f an idea is ften the clsest explanatin t the abslute truth if an idea can be explained using mathematics, then it must describe smething in the Universe if an idea is believed by mre than 50% f the peple in a sciety then it must be true Questin 2 A fictinal alien called Seratsthenes lives n Mars in a city called Psyene. She learns that n the Martian summer slstice in the city f Lexandria, which is near a Martian latitude f 25 N, a stick casts n shadw when placed upright in the midday sun. At the same time (midday), in Psyene, an upright stick casts a shadw f 12. If Psyene is 110km suth f Lexandria, what wuld Seratsthenes measure t be the circumference f Mars? 3200km
2 3300km 3400km 3500km Questin 3 Fr an bserver at a fixed lcatin n the Earth, the angle between the Celestial Suth Ple at a declinatin f 90S and the bserver's zenith depends n the bserver's lngitude time f day time f year bserver's latitude Questin 4 If yu stand at a latitude f 20S, a star exactly n yur nrthern hrizn is at a declinatin f 20 S, and it can reach the zenith f a persn standing at a latitude f 20S declinatin f 70 N, and it can reach the zenith f a persn standing at a latitude f 20S declinatin f 20 S, and it can reach the zenith f a persn standing at a latitude f 70N declinatin f 70 N, and it can reach the zenith f a persn standing at a latitude f 70N
3 Questin 5 Frm Laramie, yu bserve a star just starting t rise abve the hrizn. At the same instant, yur friend in Hil, Hawai'i finds that this same star is just rising and is abut 0 abve the hrizn rse a few hurs earlier and is abut 50 abve the hrizn is just setting and is abut 0 belw the hrizn will rise in a few hurs and is abut 50 belw the hrizn Questin 6 The Earth turns 15 each hur (360 in 24 hurs). The Earth rbits the Sun abut 15 every 15 days (360 in 365 days). An bserver in Laramie sees a cnstellatin crssing their meridian at 10PM n January 30. Abut 15 days earlier, n January 15, the same cnstellatin crssed the bserver in Laramie's meridian at abut 10PM 9PM 11PM midnight Questin 7 Frm which f these latitudes culd yu see a star that has a declinatin f 80 N exactly n yur nrthern hrizn?
4 Frm the Earth's equatr Frm a latitude f 10 N Frm the Earth's Nrth Ple Frm a latitude f 80 S Questin 8 A cmet that mves frm a declinatin f 40 S (als written as -40 ) twards the Celestial Equatr withut mving t the east r t the west will have its right ascensin decrease with time declinatin decrease with time right ascensin increase with time declinatin increase with time Questin 9 Leaving Laramie, which f these mtins culd keep the same star at yur zenith? Mving west at abut 800mph Mving suth at abut 800mph Mving nrth at abut 800mph Mving east at abut 800mph
5 Questin 10 Standing in Laramie, are the cnstellatins seasnal? (hint: place an bject smewhere t represent the Sun and walk arund it. Winter and summer are 6 mnths, r half-an-rbit-f-the-earth apart. Frm tw psitins six mnths apart, lk up, dwn, left, right and picture which cnstellatins yu culd see in winter and in summer) N. If yu wait lng enugh yu can see the cnstellatins n any clear night f the year Yes. On a summer night all the cnstellatins that yu can see are different frm the cnstellatins that yu can see n a winter night Yes. On a summer night many f the cnstellatins yu can see are different frm the cnstellatins that yu can see n a winter night. But there are sme cnstellatins yu can see all year lng Yes, as the year prgresses, the cnstellatins change their psitins with respect t each ther, s every night brings a different mixture f cnstellatins Nt saved Submit Quiz
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