Children, even those that are vaccinated, may develop rotavirus disease more than once. That is because neither natural infection with rotavirus nor rotavirus vaccination provides full immunity (protection) from future infections. Usually a personâs first infection with rotavirus causes the most severe symptoms.
Because molecules move quicker at higher temperature, causing them to collides more. Since they collides more, reaction occurs to be a lot faster to. And that's why things dissolve quicker in hot water than in room temperature water.
When you mix sugar with water, the sugar dissolves to make a transparent solution. Salt dissolves in water too. Heat can help some substances dissolve faster in water. Salt, for example, will dissolve quicker in hot water than in cold water. Substances that dissolve in water are called soluble substances.Substances that do not dissolve in water are called insoluble substances. When you mix sand or flour with water, they do not dissolve.1  Page: 2  1. 3  2. 4  3. 5  4.6  5.ubstances that dissolve in water are called soluble substances. Substances that do not dissolve in water are called insoluble substances. When you mix sand or flour with water, they do not dissolve. 1  Page: 2  1. 3  2. 4  3. 5  4. 6  5.