Answer:
Im pretty sure this is what you mean Corrosion of Copper in the Atmosphere When oxidation occurs with iron, the result is called rust. A penny with a high copper content won't disintegrate in air, because once a surface layer of copper oxide forms it prevents further corrosion.
Explanation:
Las Posadas, (Spanish: “The Inns”) religious festival celebrated in Mexico and some parts of the United States between December 16 and 24. Las Posadas commemorates the journey that Joseph and Mary made from Nazareth to Bethlehem in search of a safe refuge where Mary could give birth to the baby Jesus.
Answer:
Water vapor is less dense than these heavy molecules; in humid air, water vapor takes up space that would normally be occupied by nitrogen and oxygen. Known as the "vapor buoyancy effect," this phenomenon renders humid air lighter than dry air of the same temperature, pressure and volume.
Answer:
D. Informed Consent to Research
Explanation:
informed consent to research is a voluntary agreement to participate in a study. the subject must be made aware of the research in details and must consent to it before the start of the research.
in this case, Professor Hammond did not notify the students or seek their consent before the start of the study. However, due to the nature of the study, if the students are aware it may affect the results. thus it is adviceable to notify their guardians for consent.
