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# Posts by Trillian

Quote: Originally Posted by SMUM In fact, whenyou are dying you won't give a crap about your ph.d. I'm not convinced of that. To me, my PhD represents intellectual fulfillment which is just as important as the fulfillment brought to me by being a mother. If I had not chosen to push myself to get a PhD I think I would have regretted it forever. I don't have a problem with people waving around letters after their name or feeling proud of it. It...
Quote: Originally Posted by BeckC *Former mechanical engineer* Trillian is right that Force does not equal weight times speed. Force equals mass times acceleration. *Note - lbs is a weight not a mass* Momentum equals mass times speed. The weight of something is it's mass times the acceleration due to gravity. So weight is actually a force. (That's why people are lighter on the moon. The force due to gravity is different.) Therefore, no,...
Quote: Originally Posted by wendy1221 Force=mass*acceleration, not mass*speed, and the units are lbs per quare inch or whatever, not lbs. Actually pounds is a valid unit of force, and can be converted to newtons (the SI unit). Pounds per square inch is a unit of pressure.
Quote: Originally Posted by an_aurora Yes, she was correct. That is how you calculate the pounds of force being exerted on the car seat, or in this case the ring sling. She was absolutely correct: 10 lbs of baby in a 30 mph crash= 300 pounds being exerted. No, I'm sorry, but this is wrong. You cannot multiply pounds x speed and get pounds. Does. Not. Compute. To calculate force you need mass times acceleration, in properly adjusted units.
Quote: Originally Posted by cognito Say you have a 10lb baby in there & are in a 30mph crash, that would mean the sling would have to support 300lbs. Also not correct, see my post above.
Quote: Originally Posted by ThreeBeans Let's say you're a 120 pound woman and you were in a 30 mph crash. That would be THREE THOUSAND SIX HUNDRED pounds of force on your baby should there be an impact. This doesn't make sense. The units don't work: pounds (mass) x mph does not equal pounds (force). In order to calculate the force of impact on the baby you need the acceleration of the vehicle. If you go from 30 mph to 0 slowly, there is very...
Quote: Originally Posted by lava mama Only 426 people have our last name. Same here! Maybe we have the same last name.
Quote: Originally Posted by rosehillworks My understanding is that since you did not require a rhogam shot after your first pregnancy because of the babies blood type your ok this pregnancy and will only require a rhogam shot if the baby you are pregnant with has a positive blood type and it would actually be to protect the next baby. This is only partially true. Yes, the shot is given primarily to protect the next baby, but it should be given...
I voted no because I think of showers mainly as a way of helping new parents get the supplies they need for a first baby. If it is going to be a less traditional shower and more of a "welcome baby party" then I would say go for it. I was a little put off by the idea that mom #2 wants a shower because it is her first baby. It gives me the feeling that she doesn't think of baby #1 as equally hers, though obviously that is pure speculation. Maybe she just loves parties. Do...
We eat dinner at the table nearly every night.
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