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# help!!!

 Posts: 75 Add as FriendChallenge to a DebateSend a Message 6/12/2012 11:56:00 AMPosted: 5 years agohi guys. i know this isnt really a debate topc but i really need help!! please lend some assistance soon. i have treid everything and have no idea. please help!!A bacterium has a length of 5.5 x 10 ^-6 m butseen through a powerful microscope appearsto be 1.2 10 ^-3 m. What is the magnificationof the microscope?p.s. 10^-3 or 10 ^-6 means 10 to the power of negative 3 or 6. I cant get the power symbols.Merry Christmas!
 Posts: 7,102 Add as FriendChallenge to a DebateSend a Message 6/12/2012 12:14:53 PMPosted: 5 years agoAt 6/12/2012 11:56:00 AM, leah12 wrote:hi guys. i know this isnt really a debate topc but i really need help!! please lend some assistance soon. i have treid everything and have no idea. please help!!A bacterium has a length of 5.5 x 10 ^-6 m butseen through a powerful microscope appearsto be 1.2 10 ^-3 m. What is the magnificationof the microscope?p.s. 10^-3 or 10 ^-6 means 10 to the power of negative 3 or 6. I cant get the power symbols.Well, given it said powerful microscope, I can't help but assume they mean electron microscope, which isn't locked to specific magnification settings (10x, 40x, 400x). So, it isn't going to be an even, round number. Therefore, just apply algebra:0.0055x = 1.21.2/0.0055 = xx = 218 times magnification.
 Posts: 4,488 Add as FriendChallenge to a DebateSend a Message 6/25/2012 4:04:39 PMPosted: 5 years agoIt would be apparent size / actual size = 1.2 x 10^-3 / 5.5 x 10^-6 = 218. Remember that 1 / 10^-6 = 10^6.Electron microscopes have magnifications up to 10,000,000 so it's likely an optical microscope. Combinations of eyepiece and objective lens can produce odd numbers. There are also zoom microscopes.