World Languages

World Languages, 18.08.2019 20:20, paigedice8090

What is the general relationship between temperature and star brightness?

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Physics, 01.07.2019 14:50, jamarcusweverjr1133

Avariable star is one whose brightness alternately increases and decreases. for one such star, the time between periods of maximum brightness is 5.7 days, the average brightness (or magnitude) of the star is 4.2, and its brightness varies by ±0.25 magnitude. find a function that models the brightness of the star as a function of time (in days), t. (assume that at t = 0 the brightness of the star is 4.2 and that it is increasing.)

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Mathematics, 05.08.2019 16:20, dinosaur10

Acepheid variable star is a star whose brightness alternately increases and decreases. for a certain star, the interval between times of maximum brightness is 5.7 days. the average brightness of this star is 2.0 and its brightness changes by ±0.45. in view of these data, the brightness of the star at time t, where t is measured in days, has been modeled by the function b(t)=5.0+0.45 sin (2πt/4.6), where t is measured in days. find, correct to two decimal places, the rate of increase after five days.

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Mathematics, 26.08.2019 23:00, sophiaroeloffs4348

Acepheid star is a type of variable star, which means its brightness is not constant. the relationship between the brightness of a cepheid star and its period, or length of its pulse, is given by m = –2.78(log p) – 1.35, where m is the absolute magnitude, or brightness, of the star, and p is the number of days required for the star to complete one cycle. what is the absolute magnitude of a star that has a period of 45 days? use a calculator. round your answer to the nearest hundredth.

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