Hubble's Law Relates the Speed of a Galaxy from Its

question 47

Multiple Choice

Hubble's Law relates the speed of a galaxy from its distance to us. If you assume Hubble's constant to be 23 km/s/10⁶ ly, then what is the distance of a galaxy that is traveling at 10% the speed of light away from us?

• A) It is not possible for a galaxy to travel so fast!
• B) 1.3 × 10¹⁰ ly
• C) 1.3 × 10⁹ ly
• D) 1.3 × 10¹¹ ly
• E) 1.3 × 10⁸ ly

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Definitions:

River Terrace

A flat, bench-like structure adjacent to a river, formed either through the river eroding sediment deposits or changes in sea level.

Modern River Channel

The contemporary course taken by a river as it flows to the sea, often shaped by natural and human factors.

Erosion

The process by which natural forces remove soil, rock, or dissolved material from one location and transport it to another, shaping the landscape.

Half Lives

The time required for a quantity to reduce to half its initial value, commonly used in reference to radioactive decay.