subject
Physics, 19.10.2021 04:00 katherinevandehei

Even through a telescope, a star appears to be a single star but through the spectroscope it shows a pattern of two absorption lines for each of the lines in the spectrum of a star like our sun. For each member of the pattern, one line, which is somewhat stronger than the other, is at a shorter wavelength. The weaker is at a somewhat longer wavelength. Over the 5 days the two lines merge into one then separate during the next 5 days back to the former maximum difference. However, now the stronger line is at a longer wavelength. From this evidence, there are actually stars which orbit one another once every days.

ansver
Answers: 2

Another question on Physics

question
Physics, 22.06.2019 07:30
Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?
Answers: 3
question
Physics, 22.06.2019 13:30
Why do astronauts in the space shuttle weigh less?
Answers: 3
question
Physics, 22.06.2019 17:40
Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.
Answers: 2
question
Physics, 22.06.2019 20:30
This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.
Answers: 1
You know the right answer?
Even through a telescope, a star appears to be a single star but through the spectroscope it shows a...
Questions
question
Geography, 19.09.2019 15:30
question
History, 19.09.2019 15:30
Questions on the website: 13722367