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Velocity addition: A spaceship approaching an asteroid at a speed of 0.60c launches a rocket forward with a speed of 0.40c relative to the spaceship. At what speed is the rocket approaching the asteroid as measured by an astronaut on the asteroid?
PTH
Parathyroid hormone, a peptide hormone secreted by the parathyroid glands, essential in regulating serum calcium levels.
Correct Meaning
The accurate interpretation or significance of a word or expression.
Sodium
a chemical element, designated by the symbol Na, essential for nerve and muscle function, and regulating body fluids.
Correct Abbreviation
A standardized short form of a word or phrase that is officially recognized and widely used for documentation and communication.
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