Answer:
B.Bronze is harder than copper, so it retains a cutting edge sharper than that of copper.
Explanation:
The importance of bronze in the history of the human kind can not be only measured in the durability but the help that it provided to our ancestors, the things they were allowed to do once they dicovered how to mold it, and the tools that they produced and made many every day tasks easier for them and the ability of bronze to mantain the cutting edge longer than copper was one of the main reasons why it took its places in the fabrication of many tools.
Electrons have electric charge of -1 and the number of electrons in an atom is equal to the number of protons. ... Heavier atoms tend to have more neutrons than protons, but the number of electrons in an atom is always equal to the number of protons. So an atom as a whole is electrically neutral.
Answer:
Both sample A and B are mixtures .
Explanation:
Sample A
The given sample has density of .77 g / ml and a component of sample that is separated from vaporization has different density of 1.04 g / mL . From this density it appears that it is water . So sample a appears to be a mixture of water and another matter having lesser density and it is water soluble .
Sample B
It is also a mixture . One component is soluble in water and the other black component is not soluble in water . The soluble component gets dissolved in water and get separated and filtered out . The insoluble part remains stuck to filter paper .
