Aballoon contains 46.3 l of helium at 42 oc, and 2.01 atm is released into the air. at a certain altitude, the temperature falls to 21 oc, and the pressure falls to 0.25 atm. what is the volume of the balloon under these conditions? a. 3.5 l b. 35.0 l c. 347.5 l d. 3475.0 l e. none of the above

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

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.