Answer:
Explanation:
The calcite Crystal can be identified by carrying out an acid test on it. This is done by bringing it in contact with a weak acid which cause crack in it structure. Hence a little of carbondioxide gas is released.
Since diamond is the hardest object,it can be identified on a Mohs scale. Likewise it can be tested by bringing it in contact with a newspaper, if the letters on the paper are not seen, that shows it is a pure diamond.
Window glass is identified by the code on it.
While Quartz Crystal is identified by scratch test. When it is used to scratch all other softer stones and metal, it leaves mark on them.
We know that potential energy is the energy that is stored within an object while kinetic energy is the energy that is in motion. The connection between the two is that potential energy transforms into kinetic energy
Answer:
Work is done in moving a charge of 2 coulomb across two points having a potential difference of 12 volt is 24 joule .
Explanation:
Answer:
v = 75 m / 15 s = 5 m/s
Explanation:
Speed is equal to the distance traveled divided by the time.
v = d / t
Answer:
See below
Explanation:
<h3>When a cold alcohol thermometer is placed in a hot liquid, the following takes place.</h3>
- The glass of thermometer expands because of the heat so the column of alcohol goes down.
- After some time, the heat travels to alcohol and then alcohol expands.
<h3><u>So, Reason why alcohol goes down first:</u></h3>
Alcohol first goes slightly down because of the expansion of the glass of thermometer before doing up.
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