By definition, polymers are large molecules made by bonding (chemically linking) a series of building blocks. The word polymer comes from the Greek words for âmany parts.â Each of those parts is scientists call a monomer (which in Greek means âone partâ). Think of a polymer as a chain, with each of its links a monomer.
Save this Post. 3. Re: Rear facing seats in United 747-400 business class. Jan 14, 2013, 7:17 PM. I would still go with the upper deck, even with the 3 less length. The main business cabin on the 744 feels rather cramped in business class. The upper deck seats are much quieter and private. You also have the additional storage compartments along the window side. I have travelled on this plane, but in forward facing seats. We could only see the passengers across the aisle, not those in front of us. The upper deck was quiet, the side storage compartments excellent and the seat pitch more than adequate.
In a rear-facing car seat, the chance of injuries to the arms and legs in a crash is less than 1 in 10,000.. So it's still the safest position, even for kids who look constricted in a rear-facing seat. As long as kids are within the height and weight limits of the seat, they're most likely quite comfortable, too.Many rear-facing car seats now accommodate kids who weigh 40, 45, or even 50 pounds, and are up to 49 inches tall.ut in 2011 the American Academy of Pediatrics (AAP) revised its policy, citing a study that found children younger than 2 are 75 percent less likely to be killed or injured in a car crash if they're in a rear-facing car seat.