30 g of glucose is dissolved 500 g of water. calculate the percentage by mass of glucose solution

In the study “a comparative study between old (1995-2003) and current (2006-2010) philippine one peso coins” the investigators wanted to determine if there was a difference in the properties of the coins minted between the years 1995-2003 and 2006-2010 on terms of following parameters: mass composition, density metallic properties, and economic value. what would be the null hypothesis and alternative hypothesis for this study?

Among the given typhoon which of the following is categorized under

Superstitious belief about comet, asteroid, and meteor in different country