Physics

A binary star system consists of two equal mass stars that revolve in circular orbits about their center of mass. The period of the motion, T=29.6 days, and the orbital speed v= 220 km/s of the stars can be measured from telescopic observations. What is the mass (kg) of each star?

  1. 👍
  2. 👎
  3. 👁
  1. Each has a force holding it to the other.

    F=GM^2/d^2

    this is equal to centripetal acceleration.

    GM^2/d^2=v^2/(d/2)^2

    check my thinking. solve for M

    1. 👍
    2. 👎
    👤
    bobpursley
  2. Using Newton's law and the law of universal graviation:

    F=ma
    Acceleration is centripital acceleration, so a=(v^2)/r

    so G(m^2/r^2)=m(v^2/r)

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science!!!

    1. Why can certain stars sometimes be identified as eclipsing binary stars? A. They are brighter than any single star B. They are all white dwarfs C. They become dimmer at regular intervals D. They are cool red stars

  2. science/astronomy

    4. Which of the following is a common feature among the four inner planets? (1 point) atmosphere composition distance from the sun rocky surfaces**** temperature range 5. Which of the following is the smallest terrestrial planet?

  3. science

    Which of these correctly compares the masses of different objects in the universe? * A A moon has less mass than a star and more mass than the planet it orbits. B A planet has less mass than a galaxy and more mass than the star it

  4. Science

    which of the following can help astronomers detect if a star is part of a binary star system A. the star varies temperatures near the binary star B. the star wobbles near the binary star C. the star has very strong gravity D. the

  1. Science please help :)?

    3. which if the following factors determines how long a star will live ? ( 1point ) A . star’s color b. the star’s mass**** c. the star’s diameter d. the star’s distance from the sun 4 . which of the following causes

  2. Science Help Please

    8. Which of these correctly compares the masses of different objects in the universe? A moon has less mass than a star and more mass than the planet it orbits. B A planet has less mass than a galaxy and more mass than the star it

  3. Physics

    In a binary star system, two stars orbit about their common center of mass, as shown in the figure . If r2 = 2r1, what is the ratio of the masses m2/m1 of the two stars?

  4. Astronomy

    1. What color are stars that are very hot and very bright? A. Red B. Blue C. White D. Yellow 2. During the contraction of a protostar, density increases and ______ rises. A. Nuclear energy B. Dust C. Temperature D. Outflow 3. What

  1. Science

    1. The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.stars would be * 3 points Captionless Image A Barnard’s Star is less bright than the sun, has a surface

  2. science !!

    1. how do scientists classify stars? by size distance and color by size distance and brightness by color brightness and distance by size brightness and temperature 2. which of The following factors determines how long is Star will

  3. Science

    1) Why can certain stars sometimes be identified as eclipsing binary stars? Answer) B. They become dimmer at regular intervals 2) Which of the following is a major difference between elliptical galaxies and spiral galaxies Answer)

  4. Science

    A student creates a chart to describe Earth’s solar system in the Milky Way galaxy. Which statement could be included to accurately describe the solar system as part of the galaxy? (1 point) The solar system is comprised of

You can view more similar questions or ask a new question.