What are the three struggles astronauts would face in long term space travel?

Afamily is one another name for a group on the table of elements.

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments