Supermassive galaxies are found at the core of rich galaxy clusters
Indicate whether the statement is true or false
TRUE
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Notice the distorted galaxy images, such as the large arc-shaped structure, in this image of a galaxy cluster. What can astronomers learn by carefully measuring the distortions in this image?
A) the total mass of the cluster B) the amount of dark energy in the universe C) the precise distance to the galaxy cluster D) the age of the galaxy cluster
The first law of thermodynamics is basically a special version of the law of ______________
Fill in the blank(s) with correct word
What is synchronous rotation?
A. a body's rotation rate that is equal to its parent planet's rotation rate B. a body's rotation rate that is equal to its orbital period C. a body's rotation rate that does not change with time D. a body's rotation rate that changes with orbital distance
If a person is nearsighted the corrective lens will:
a. take an object at the far point and form an image at 25 cm. b. take an object at 25 cm and form an image at the far point. c. take an object at infinity and form an image at the far point. d. take an object at infinity and form an image at 25 cm.