Answer:
B. An astronaut in a spaceship
<u>Isolated</u><u> </u><u>system</u><u> </u><u>:</u><u>-</u>
In an isolated system, there is no transfer of energy or matter between the system and the environment.
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Answer:
The metal which is liquid in room temperature is mercury
Hi,
The answer should be ‘soap is a base because it’s pH is above 7’
Series circuit is the answer