What Is the Basic Definition of a Black Hole

question 18

Multiple Choice

What is the basic definition of a black hole?

• A)any compact mass that emits no light
• B)a dead star that has faded from view
• C)any object from which the escape velocity exceeds the speed of light
• D)any object made from dark matter
• E)a dead galactic nucleus that can only be viewed in infrared

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Definitions:

Petechiae

Small, red or purple spots on the body, caused by minor bleeding from broken capillary blood vessels.

Nontender Lymph Nodes

Lymph nodes that are not painful upon examination, potentially indicating a non-inflammatory condition.

Testicular Cancer

A type of cancer that originates in the testicles, the male reproductive glands located in the scrotum.

Painless Mass

An abnormal lump or growth in the body that does not cause pain, potentially indicating a benign or malignant condition.