Determine the npsh available when a pump draws water at 30 °c from an outside storage tank (open to atmosphere) whose level is 1.5 m above the pump inlet. the energy losses in the suction line total 0.4 m and the atmospheric pressure is 100 kpa(abs). (b) if npsh, for this pump is 11.1 m, is it safe to operate this pump?

there are two significant figures.

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.