Answer:
D. The kinetic energy is greater after a substance changes from a
solid to a liquid
Explanation:
During a phase change from solid to liquid, the particles making up the mobile becomes more mobile and as a result there is an increase in kinetic energy of the system.
- Kinetic energy is the energy accrued due to the motion of a body.
- In a melting process where solids turn to liquid, there is an increase in kinetic energy.
- When randomness of a system increase, kinetic energy also increases.
- From liquid to gas and gas to plasma increases kinetic energy.
- In the other way round, the kinetic energy reduces.
<span> A compound <span>lens microscope. </span></span>
<h2>
Answer: # of neutrons = 9</h2>
<h3>
Explanation:</h3>
# of neutrons = mass number - atomic number
= 17 - 8
= 9
<h3>∴ number of neutrons in an atom of oxygen of mass number 17, is 9.</h3>
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