Physics

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How are photosynthesis and aerobic respiration related? What will be an ideal ... Started by lbcchick	3 Replies 164 Views	Jul 27, 2018 by abro1885
Life emerged from the oceans about _________ billion years ago. Fill in the blank(s) with correct ... Started by cherise1989	1 Replies 91 Views	Jul 27, 2018 by InfiniteSteez
The Viking spacecraft searched for life on Mars by looking for the effects of life on the upper ... Started by HCHenry	1 Replies 117 Views	Jul 27, 2018 by bhavsar
The wavelengths that are most likely for communication with other civilizations are those in the ... Started by Jramos095	1 Replies 56 Views	Jul 27, 2018 by milbourne11
The Arecibo radio message to extraterrestrials contains information about the structure of DNA. ... Started by fbq8i	3 Replies 203 Views	Jul 27, 2018 by tandmlomax84
In general, what is true of the alpha star in a constellation? A) It is the bri Started by Melanie	3 Replies 2,933 Views	Jun 6, 2016 by Ahernandez18
Osmotic pressure =Hydrostatic pressure?in case of u shaped tube Started by Perkypinki	1 Replies 1,431 Views	Dec 30, 2014 by Celeste
What information about an astronomical object can be determined by observing its Started by plus1	1 Replies 1,640 Views	Aug 28, 2013 by notis
If the rest wavelength of a certain line is 600 nm., but we observe it at 594 nm Started by plus1	1 Replies 2,256 Views	Aug 28, 2013 by notis
According to the Zeeman effect, the splitting of a sunspot's spectral lines is d Started by plus1	1 Replies 1,959 Views	Aug 28, 2013 by notis
The broadening of spectral lines can be caused by: A) density of the hot medium. Started by plus1	1 Replies 1,039 Views	Aug 28, 2013 by notis
The observed spectral lines of a star are all shifted towards the red end of the Started by plus1	1 Replies 1,800 Views	Aug 28, 2013 by notis
If a source of light is approaching us at 3,000 km/sec, then all its waves are A Started by plus1	1 Replies 1,297 Views	Aug 28, 2013 by notis
Spectral lines are often referred to as the stars' "fingerprints" because: A) fi Started by plus1	1 Replies 1,538 Views	Aug 28, 2013 by notis
The splitting of spectral lines in the presence of strong magnetic fields is the Started by plus1	1 Replies 1,278 Views	Aug 28, 2013 by notis
Since the difference in energy between the different rotational states in a mole Started by plus1	1 Replies 958 Views	Aug 28, 2013 by notis
Why are molecular lines more complex than elemental spectral lines? A) Molecules Started by plus1	1 Replies 1,653 Views	Aug 28, 2013 by notis
In a hydrogen atom, a transition from the third to the second energy level will Started by plus1	1 Replies 1,001 Views	Aug 28, 2013 by notis
For hydrogen, the transition from the second to the fourth energy level produces Started by plus1	1 Replies 1,249 Views	Aug 28, 2013 by notis
To have a negative ion, you must have: A) taken away a proton from the nucleus. Started by plus1	1 Replies 1,207 Views	Aug 28, 2013 by notis
Emission lines of hydrogen that are found in the ultraviolet part of the electro Started by plus1	1 Replies 1,064 Views	Aug 28, 2013 by notis
) The Balmer Beta absorption line is a result of a transition of an electron in Started by plus1	1 Replies 1,207 Views	Aug 28, 2013 by notis
The energy required to move an electron in a hydrogen atom from energy level 2 t Started by plus1	1 Replies 1,765 Views	Aug 28, 2013 by notis
The energy required to move an electron in a hydrogen atom from energy level 1 t Started by plus1	1 Replies 1,321 Views	Aug 28, 2013 by notis
The energy required to ionize a hydrogen atom whose electron is in the ground st Started by plus1	1 Replies 1,078 Views	Aug 28, 2013 by notis

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