Friday
December 6, 2013

Posts by frank

Total # Posts: 326

science
Thanks

Chemistry
Dr Bob, Thanks for the help with the conversion. I was missing the solution on two fronts. One was the wavelength factor and the other was the MegaHertz. Do you know where I can find more information on "wavelength of the radiation" ? There is not a lot of specific d...

Chemistry
I'm having a difficult time with the Conversion Units in my equation. Attempting to answer this question: My cell phone has an antenna about 10.00cm long. If this is one quarter of the wavelength of the radiation, at what frequency in Megahertz does it operate? Note that c...

science
My cell phone has an antenna about 10.00cm long. If this is one quarter of the wavelength of the radiation, at what frequency in Megahertz does it operate? Note that cell phones, like radio, transmit sounds via electromagnetic waves which travel at the speed of light or 3x108m/s

math
Open boxes are being designed to hold mail for the post office. The boxes will be made to have the greatest possible volume. Each box will be made from a sheet of metal that measures 15 inches by 12 inches. They will be formed by cutting and removing a square from each corner....

general science
a train goes forward at a speed of 1 m/s for 20 seconds. then it stops and goes backward at a speed of 0.5 m/s for 4 seconds. after both movements are completed, how far is the train located from its starting point.

physics
A person desires to reach a point that is 1.70 km from her present location and in a direction that is 40.0° north of east. However, she must travel along streets that are oriented either north-south or east-west. What is the minimum distance she could travel to reach her ...

Chemistry
How many atoms of nitrogen are in a molecule of Al(No3)3

Astronomy 1010
You have two objects that are the same size, but one is significantly hotter than the other.How are the spectra of two objects different from one another? please detail help and answer..

Astronomy 1010
Do all wavelength of light make it through the atmosphere? Explain. please detail help and answer

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