Answer:
In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed. The distinction between physical and chemical change is not clear cut.
Explanation:
Answer:
We are asked to describe the half-life of the radioactive materials.
- Hence the 3rd option is correct
Answer:
3966.82 J
Explanation:
q=sm∆T
q=73×13×4.18
the specific heat for water is 4.18
It was the element of aluminium where they predict their properties <span />
Methylene chloride is less dense than water
