A natural crystalline substance with different chemical and physical characteristics called gems and minerals can be found in expedition done by a gemologist. Gems and minerals are like an ordinary rock in their natural state but polished in order to have more value. They are often used as jewelry.
True because positive and negative ions makes neutral hence the water is neutral
The fuel released 90 calories of heat.
Let suppose that water experiments an entirely <em>sensible</em> heating. Hence, the heat released by the fuel is equal to the heat <em>absorbed</em> by the water because of principle of energy conservation. The heat <em>released</em> by the fuel is expressed by the following formula:
(1)
Where:
- Mass of the sample, in grams.
- Specific heat of water, in calories per gram-degree Celsius.
- Temperature change, in degrees Celsius.
If we know that 
, 
and 
, then the heat released by the fuel is:
The fuel released 90 calories of heat.
We kindly invite to check this question on sensible heat: brainly.com/question/11325154
Except D.
Pollution doesn't prevent cancer.
Unless the pollution is made of a cancer-curing medicine.
it is true good friend chip chip cherrio
