Which statement about the density of cold water is most likely correct?
2 answers:
Answer: Option (A) is the correct answer.
Explanation:
Density is defined as the mass of a substance divided by the volume of the substance.
Mathematically, Density =
In cold water, molecules are more closer to each other due to which there occurs increase in mass of the substance. As density is proportional to mass of the substance. So, density of cold water will be more.
On the other hand, in warm water molecules have more kinetic energy so, there will be more number of collisions. As a result, molecules will move away from each other due to which there will be decrease in density.
Thus, we can conclude that the statement cold water is more dense than warm water, is true about the density of cold water.
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Answer : Option 1) nuclei of and nuclei of
only.
Explanation : Radiation is spontaneously emitted from nuclei of because this isotope of hydrogen is highly radioactive as compared to other isotopes of hydrogen namely; nuclei of
and nuclei of
.
They have much stable nucleus as compared to nuclei of .
The more it is unstable the more radiations will be emitted from its nucleus.