The answer is neutrons and protons.
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In studying effects of collisions between galaxies, astronomers usually make use of space telescopes.
Astronomy deals with the study of outer space. The study focuses on planets and other celestial bodies. Generally telescopes are used to study outer space. The particular type of telescope that is used depends on the need.
In studying effects of collisions between galaxies, astronomers usually make use of space telescopes.
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Burning wood because heat indicates a chemical change
Answer:
mass is the amount of substance contained in matter while volume is the space occupied by matter
in other words , mass talks about how heavy a body is while volume deals with the space covered by a 3- dimensional body. note : A 2- dimensional body can't occupy volume