A star is observed with a surface temperature of 3000 K and a luminosity of 10?3 times that of the Sun. Based on the H-R diagram shown above, what is the approximate radius of this star?

A) 0.1 solar radius
B) 0.5 solar radius
C) 1 solar radius
D) The radius cannot be determined.


A) 0.1 solar radius

Physics & Space Science

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The change in constellations with the seasons are caused by ________.

A. the rotation of Earth B. the Sun's orbit around the center of the galaxy C. zodiacal shift D. the precession of Earth's axis E. the revolution of Earth

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Describe how Einstein used the photoelectric effect to support the particle theory of light and photons

What will be an ideal response?

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Newton found that when light passed through a prism, it was dispersed into the component colors. Which bent the least, and why?

What will be an ideal response?

Physics & Space Science

The number of ______________ appearing on the Sun varies over an 11-year cycle

Fill in the blank(s) with correct word

Physics & Space Science