isopropyl acetate has a density of .87 grams per centimeter cubed (g/cm³). Alexei wants to know if his unknown object will float or sink in isopropyl acetate. The object has a mass of 15 g and a volume of 18cm³. Explain what will happen when Alexei places the object in the isopropyl acetate? Show your work.

Effect of rotenone and antimycin a on electron transfer rotenone, a toxic natural product from plants, strongly inhibits nadh dehydrogenase of insect and fish mitochondria. antimycin a, a toxic antibiotic, strongly inhibits the oxidation of ubiquinol. (a) explain why rotenone ingestion is lethal to some insect and fish species. (b) explain why antimycin a is a poison. (c) given that rotenone and antimycin a are equally effective in blocking their respective sites in the electron-transfer chain, which would be a more potent poison? explain.

How do dying stars contribute to the formation of planets

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?