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- How is the intrinsic variable star studied and observed?Apparent Brightness (rank; Earth (light years) 1 brightest, 8 = dimmest) Distance from Name of Star Sun Sirius 2 8.6 Canopus 309 3 Arcturus 36.7 4 Rigel Vega Alpha Centauri 773 25.3 6 4.3 7. Bernard's Star 5.9 8The picture below shows the position of Earth and two stars. Star 1 is 18 light years from Star 2 and 34 light years from Earth. If Star 2 explodes as a supernova, in how many years would the explosion be seen from Earth? (3 points) Group of answer choices 18 34 70 52
- If one of the planets in our solar system averages 0.723332 astronomical units from the sun, what is its orbital period (in Earth years, with one year = 365.256 Earth days)? the cubic root of (0.723332)1/2 = 0.947450 Earth years the square root of (0.723332)1/2 = 0.922220 Earth years the cubic root of (0.723332)1/3 = 0.964652 Earth years the square root of (0.723332)3 = 0.615186 Earth years the cubic root of (0.723332)2 = 0.805796 Earth yearsAccording to Johannes Kepler’s third law, the above planet must be: closer to the sun than the Earth is (in miles), and with a longer orbital period (in Earth years) farther from the sun than the Earth is (in miles), and with a longer orbital period (in Earth years) closer to the sun than the Earth is (in miles), and with a shorter orbital period (in Earth years) farther from the sun than the Earth is (in miles), and with a shorter orbital period (in Earth years) none of the aboveIf it takes 8 minutes for light from the sun to reach earth ,it will take approximately 240.4 minutes for light to reach the planet:
- For Be-10, find the: a.) mase defect (in grams) b.) binding energy in kilojoules per mole. mass proton= 1.00728 amu; mass neutron= 1.00867 amu; mass Be-10 = 10.013534679 amuThe half-life of 1311 is 8.04 days. (a) Convert the half-life to seconds. (b) Calculate the decay constant for this isotope. s-1 (c) Convert 0.550 µCi to the SI unit the becquerel. |Bq (d) Find the number of 1311 nuclei necessary to produce a sample with an activity of 0.550 μCi. | 1311 nuclei (e) Suppose the activity of a certain 131I sample is 7.10 mCi at a given time. Find the number of half-lives the sample goes through in 40.2 d and the activity at the end of that period. (Enter your answer for the number of half-lives to at least one decimal place.) half-lives mCiwhat are stars made of?
- the moons position among the stars was observed at moonrise. six hours and 12 min later the moon happened to be exactly at the zenith. its position among the stars by them had shifted to the east by 148 arcmin. on the other hand the moons orbital motion alone would cause it to move eastward on the celestial sphere at the rate of 33 arcmin/hr. find the distance to the moon. compare your results with the average value of the distance to the moon33.) 3.) Come up with 2 illustration of objects that exhibit patterns in nature and write a briefexplanation 3 to 5 sentences for each object illustrated.Describe two spectroscopic techniques that can be used to determine the structure of the GPCR