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Question by darkfairy: astronomy questions i need help?
ok i have finals this week & I have a study guide for astronomy that Ive been working on for the last 2 days. Ive got most of the work issues, but there are still SOE I cannot seem into find te answer, so if u could help me that would be cool. Ive got most of them but still I need help on some of dem.1.waht the range of values ​​for right ascension? 2.scientists never accept petolimiac model because? Now I think the answer into this one is because it appears that athe earth was center of the universe, & did never mention all the planets) 3 how did Kepler describe lanes? 4th What was Brahe’s contribution into astronomy? 5.who developed the law of universal gravitation? 6.How makes gravity changes with mass & distance? 7.how is calculated wave speed? 8th what is the wave amplitude? 9.waht is true about soundwave & EMR? 10th what is constant for all types of EMR in a vacuum? 11.what is the relationship between waves of electric & magnetic fields? 12th whicch type EMR has lwesst frequency types can penatrate the atmospere? why are x-ray telsecopes in orbit? EMR with a wavelength of 700 nm is? why is there no radio telescopes in space? what EMR are our eyes most sensitive to? who developed the3 laws relating into the spectral lines? what can identify emission spectra? what is fraunhaufer lines? what information about an astronomical object can be determined by observong its spectrum? wat is pimary purpose of an astronomical telescope? thats all for now.

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Question by shak!: homework question help?
A compact fluorescent light (CFL) produces EMR in the visible bands thus are energy efficient, whereas an incandescent bulb is a black body emits. How long (hours) makes dettræffe into ‘break even’ on “Green” buy when electricity is $ 0.10 per kWhr? CFL is 14W, $ 7.63: $ 1.00 or 75Wpære please show steps please

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Question by drillsgtwife: General chemistry help?
1. Nitric acid is produced using the following equation: 3 + NO_2 H_2O> 2 HNO_3 + NO.Hvor many grams NO_2 is required into produce 7.50 grams HNO_3? Second Calculate the frequency of EMR having a wavelength of 1.315 mikrometer.Kan you show all the calculations, so I can try & figure out how you’ve done disse.Tak

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Question by Lori: Need Help With This Question PLEASE – I’m So Stuck?
We’re talking about maybe the size of practice will be a crucial factor if an EMR should be put in place. What’s classes ideas about size as it relates into hospitals? Do you think there is a difference if it is a little hospital or a major medical center? What would be your reasons for your answer?

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