Explain what a standard candle is and how it could be used to determine a galaxy's distance

What will be an ideal response?


A standard candle is an object with a well-known luminosity, such as a Type I supernova. If we see a standard candle in a distant galaxy, we can measure its apparent brightness and use the inverse-square law to determine its distance.

Physics & Space Science

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What is the closest planet to the sun?

a. Neptune b. Uranus c. Earth d. Mercury e. Venus

Physics & Space Science

Differential rotation is when a planet's equator and polar regions rotate at different rates

Indicate whether the statement is true or false

Physics & Space Science

A 0.50-kg toy is attached to the end of a 1.0-m very light string. The toy is whirled in a horizontal circular path on a frictionless tabletop

If the maximum tension force that the string can exert on an object without breaking is 350 N, what is the maximum speed the toy can have without breaking the string? A) 700 m/s B) 26 m/s C) 19 m/s D) 13 m/s

Physics & Space Science

Sediments that are transported to the sea in solution are known as ______________ sediments

Fill in the blank(s) with correct word

Physics & Space Science