Imagine Three Universes That Have the Same Expansion Rate and Contain

question 29

Multiple Choice

Imagine three universes that have the same expansion rate and contain no dark energy: an open universe,a closed universe,and a flat universe.The open universe has its expansion slowed down less by the effects of matter than the closed universe or the flat universe does.Based on this,what can you say about the age of the open universe compared to the other two?

• A)The open universe will be older than both the flat and closed universes.
• B)The open universe will be younger than both the flat and closed universes.
• C)All three universes will be the same age.

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Definitions:

Contrast Agent

A substance used in medical imaging to enhance the visibility of internal structures in radiographic procedures.

Retrograde Pyelogram

A type of X-ray examination of the urinary system that involves injecting a contrast agent to view the ureters, bladder, and kidneys.

Urinary Tract

The system in the human body consisting of the kidneys, ureters, bladder, and urethra involved in the production and excretion of urine.

Sterile Catheter

A medical device used to drain fluids from or administer fluids to the body, sterilized to eliminate any microbes and minimize the risk of infection.