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just a qick qeusiton about scaling i read a few forum about scaling so bascialy the 4 units scaling comes from 3 unit how is the scaling determined? e.g if the 3 unit was a easy test and the 4 unit was hard wat happens to the 4 unit scaling? wat happens if the 3 unit was hard and the 4...

i noe the answer for the first 2 was time dialation atomic clock or mouns but the last questoin cant rember but it was confusing about advance in technologies bla bla ....

1 ) y did 1 tube jump? (repulsion? top one jumped) botom one had a rack to held it) 2) caculation part? did any put it as f=mg F/l=KII/d using this fomrular? thats all i remember form the tube and i was somelike like 221 amps or something

the quesiton was about taht momentum thing i think

H+H -----> He caculate the ,mass defect? i got the answers but dont noe where the units come fomr? mass of hydrogen = 6.68*10-27 where di this come form? mass of HE = 6.646 * 10-27 where did this come form? mass defect is minus from those units and E=mc2 2H1 +2H1 -----> 4He2...

H+H -----> He caculate the ,mass defect? i got the answers but dont noe where the units come fomr? mass of hydrogen = 6.68*10-27 where di this come form? mass of HE = 6.646 * 10-27 where did this come form? mass defect is minus from those units and E=mc2

A --------> travel at c B-------> travel at c and shines a beam towards A A will see the beam of light will travel at C NOW A --------> travel at c B-------> travel at c/2 and shines a beam towards A wat will A see the beam of light to be travling at?

does any1 have a idea of wats a good raw mark to get if u want to get like 88 or band 6? around 70/84? for a 85?\