Esulfur burns easily .iron is attracted by magnets .the mineral made by sulfur and iron ,but it does not burn and it is not attracted by magnets .is it a mixture ? why ? and why not ?

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.