Saturday

April 19, 2014

April 19, 2014

Number of results: 3,042

**chemistry**

R = red light (wavelength = 650-700nm) G = green light (wavelength = 500-550nm) B = blue light (wavelength = 450-500nm) --- to calcuate Energies, use E = hc/wavelength, but be sure to convert wavelength into meters first. ----
*Monday, November 1, 2010 at 7:10pm by CollegeChemistryNotes*

**physics**

nL/4 = 75 (n = 1,3,5...) First harmonic wavelength L = 300 cm Second harmonic wavelength = 100 Third harmonic wavelength = 60 cm Fourth harmonic wavelength = 42.9 cm Fifth harmonic wavelength = 33.3 cm Wave speed = L*frequency = 391 m/s
*Tuesday, December 6, 2011 at 9:38pm by drwls*

**Chemistry**

The ionization energy of hydrogen is 1313 kJ/mol. Covert this energy to: wavelength (nm) 1/wavelength, reciprocal wavelength (cm^-1) spectral region? (IR, visible, UV, etc.) I know E=hv=hc/wavelength h=6.62 x 10^-34 J-s c= 3x10^8 v=c/wavelength But for some reason trying to ...
*Friday, December 7, 2012 at 12:41am by Sarah*

**College Physics**

The Rydberg equation is 1/wavelength= R(1/n^2) 1/wavelength=1.097E7(1/9) wavelength=820.3nm is the shortest.
*Tuesday, April 19, 2011 at 9:39pm by bobpursley*

**Chemistry**

I can't type this in the format you want because the site won't handle it. So n1 will be a and n2 will be b. 1/wavelength = R(1/a^2 - 1/b^2) n1 = a = 1. 1^2 = 1 n2 = b = 3. b^2 = 9 1/wavelength = R(1/1 - 1/9). R = 1.0973E7 wavelength will be in meters. Then E = hc/wavelength
*Monday, March 31, 2014 at 8:39pm by DrBob222*

**physics **

frequency*wavelength= velocity 50/30*wavelength=.5/15 solve for wavelength.
*Thursday, April 28, 2011 at 7:33pm by bobpursley*

**physics**

1/2 of the microwave wavelength. That is the distance between nodes of the standing wave pattern. For the wavelength, use the equation wavelength = c/frequency
*Monday, January 31, 2011 at 11:17pm by drwls*

**Physics HELP!!**

1. What is the longest wavelength for standing sound waves in a 133.9cm long tube that is open at both ends? b).What is the second longest wavelength? c).What is the third longest wavelength? d).What is the longest wavelength for a standing wave, in the same length tube, that ...
*Friday, November 30, 2012 at 10:15pm by joane *

**Chem.**

I assume the problem is telling us that the electron travels from N = 6 to n = 2 providing a wavelength of that value. 1/wavelength = R(1/2^2 - 1/6^2) Solve for R. Wavelength must be in meters.
*Tuesday, October 26, 2010 at 9:26pm by DrBob222*

**Physics**

wave equation. Memorize this. frequency*wavelength=speed 50/26.6 * wavelength=3.55/12.1 solve for wavelength in meters.
*Thursday, February 16, 2012 at 7:13pm by bobpursley*

**Chemistry**

The color. E = h*frequency or E = hc/wavelength. Color goes from violet (about 400 nm wavelength) to red (about 700 nm wavelength). The shorter the wavelength the more energy; the longer the wavelength less less energy.
*Saturday, November 2, 2013 at 11:32pm by DrBob222*

**Physics**

velocity = frequency * wavelength V = f*w 5000 m/s = 640 Hz * wavelength wavelength = 7.8 m
*Monday, June 29, 2009 at 10:12pm by Marth*

**Physics**

frequency*wavelength=speedpropagation 4*wavelength= speedsound solve for wavelength.
*Monday, November 7, 2011 at 7:14pm by bobpursley*

**Phys**

V = (f)* (wavelength) 200m/s = 100hz * Wavelength solve for wavelength then multiply by 3 dont forget to use the units for each variable like he gave us in class i.e. frequency = vibration/time wavelength = distance/vibration velocity = distance/time
*Tuesday, November 30, 2010 at 4:44pm by Joel*

**physics**

If .661cm is a half wavelength, then lambda = 2*.661m, and third harmonic is 1/3 of that wavelength, or 2*.661/3=.440m f= speedsound/wavelength= appx 343/.440=778hz check my work.
*Saturday, January 1, 2011 at 1:48pm by bobpursley*

**physics **

change in energy = h f where f is the frequency of the photon emitted and h is Planck constant. T c = (1/f)c = wavelength so f = c/wavelength so change in energy = hc/wavelength so big change in energy goes with small wavelength That is all I will do without seeing your ...
*Sunday, May 1, 2011 at 3:30pm by Damon*

**physics**

(a) For the electron, E = 3.2*10^-18 J momentum = sqrt(2m*E) = 2.41*10^-24 kg m/s wavelength = h/(momentum) = 2.74*10^-10 m For the photon, the energy is the same but wavelength = h*c/(Energy) = 6.2*10^-8 m (b) Use the formulas E(photon) = h*c/(wavelength) E(electron) = (...
*Tuesday, April 5, 2011 at 6:21am by drwls*

**Chemistry**

1/wavelength = R*(1/632^2 - 1/732^2) R = 1.09737E7 Wavelength is in meters. c = frequency x wavelength I don't have a chart showing energy regarding spectral region but you can find one by looking google.
*Thursday, November 29, 2012 at 11:11pm by DrBob222*

**chemistry**

The DeBroglie wavelength of a moving body is given by: wavelength = h / mv h = 6.63x10^-34 Js m = 0.0459 kg v = 80.0 m/s Substitute the above values into the formula to find the wavelength.
*Wednesday, October 21, 2009 at 6:09pm by GK*

**Chemistry/Physics**

Why didn't you post your work? That way we could tell you if you worked it right or not AND you would spend your time typing instead of us. E =h*c/wavelength. Find wavelength. c = freq * wavelength. Solve for freqency.
*Wednesday, March 10, 2010 at 8:36pm by DrBob222*

**Physics HELP!!**

a) frequency x wavelength = (wave speed) 2.54*10^6 * wavelength = 6420 m/s Solve for the wavelength b) Use the same formula, but with 3.00*10^8 m/s (the "speed of light") for the wave speed, and the previous answer for the wavelength.
*Wednesday, November 21, 2012 at 11:41am by drwls*

**physics**

frequency = (wave speed)/wavelength The first harmonic has a wavelength of 2L = 62 cm. The second harmonic has a wavelength of L = 31 cm. The third harmonic has a wavelength of (2/3)*L cm = 20.67 cm
*Saturday, March 12, 2011 at 10:53pm by drwls*

**physics**

there's a equation for wavespeed=wavelength*f the wavespeed doesn't depend on the wavelength. Why not? if you double the wavelength, won't the speed increase as well. In my book, it says that v is unchanged. I don't understand
*Wednesday, July 8, 2009 at 5:50pm by Anonymous*

**Physics !>:(**

a) wave number = 1/(wavelength) = 0.280 m^-1 b) wave speed = (wavelength)*(frequency) = (wavelength)*(angular freq.)/(2*pi) = 26.25 m/s
*Saturday, November 24, 2012 at 1:18pm by drwls*

**physics**

5)a. Electrons accelerated by a potential difference of 12.23 V pass through a gas of hydrogen atoms at room temperature. Calculate the wavelength of light emitted with the longest possible wavelength. b. Calculate the wavelength of light emitted with the shortest possible ...
*Sunday, April 13, 2008 at 10:58am by Sandhya*

**chemistry**

1/wavelength = R(1/n1^2 - 1/n2^2) The n is squared, not the 1 and 2. n1 will be 2 so the first part is 1/2^2. Change frequency to wavelength with c = freq x wavelength. R is Rydberg constant = 1.097 x 10^7 m
*Monday, July 5, 2010 at 5:03pm by DrBob222*

**physis**

open at both ends? then the pipe is 1/2 wavelength long. wavelength= 343/f compute wavelength, then pipe lengths.
*Saturday, August 7, 2010 at 3:51pm by bobpursley*

**chemistry**

I would do this 1/wavelength = R(1/1^2 - 1/7^2) Then convert wavelength to frequency from c = frequency x wavelength. R = Rydberg constant. I can look that up if you don't have it.
*Sunday, October 10, 2010 at 3:50pm by DrBob222*

**Chemistry help**

1/wavelength = R(1/1 - 1/x^2) wavelength = 93.77E-9 m Solve for x = where the electron has been promoted. Then 1/wavelength = R(1/y^2 - 1/x^2) x is the value from the first part of the problem. y is the new level where the electrons finishes its journey. R = Rydberg constant...
*Thursday, February 20, 2014 at 8:43pm by DrBob222*

**chem**

You don't. Use c = f x wavelength and convert 3.76 micrometers (wavelength) to meters (wavelength). 1 micrometer = 1 x 10^-6 meters
*Friday, January 2, 2009 at 8:45pm by DrBob222*

**Chemistry**

c = freq x wavelength. c = 3E8 m/s freq = ? in Hz. wavelength = 545 nm x 10^-9 m For E in J = hc/wavelength.
*Thursday, December 6, 2012 at 12:55am by DrBob222*

**Physics**

For lowest-order constructive interference, the two distances from speaker to listener must differ by one wavelength. Wavelength = sqrt[0.85^2 + 1.1^2] = 1.39 m Frequency = (sound speed)/(wavelength) 340m/s/1.39m = 245 Hz
*Saturday, April 27, 2013 at 9:25am by drwls*

**Physics**

Rank in order the following according to their speeds, from fastest (1) to slowest (5): (i) 425-nm-wavelength light through a pane of glass, (ii) 500-nm-wavelength light through air, (iii) 540-nm-wavelength light through water, (iv) 670-nm-wavelength light through a diamond, ...
*Saturday, February 2, 2013 at 2:53pm by Cassie*

**chemistry**

I didn't check your answers to A and B. For the part you don't understand, subtract the energy of the electron in the two levels; that is the energy released. Then substitute into E = hc/wavelength and solve for wavelength.The unit for wavelength in this equation is meter.
*Monday, October 25, 2010 at 5:41pm by DrBob222*

**Chemistry Lab**

1/wavelength = R(1/n1^2 - 1/n2^2) n1 = 1 n2 = infinity which makes 1/n2^2 = 0 so you have 1/wavelength = R(1) Calculate wavelength. Then E = hc/wavelength. Solve for E in J. That will be for 1 atom. Multiply by 6.022E23 to convert to J/mol and convert that to kJ/mol.
*Monday, January 17, 2011 at 6:30pm by DrBob222*

**Chemistry**

What't the question? If you want to know the wavelength it is 1/wavelength = R(1/2^2 - 1/6^2) R = Rydberg constant = 1.097E7 You can convert to frequency by c = frequency x wavelength.
*Tuesday, May 8, 2012 at 12:54am by DrBob222*

**physics**

distance=veloicty*time=freq*wavelength*p0eriod = 1/period*wavelength*period = wavelength
*Sunday, February 23, 2014 at 6:12pm by bobpursley*

**chemistry**

I think you must have made at least one typo (for E1 I suspect that is -20 x 10^-19 J). a. delta E = E3 - E1 = hc/wavelength Substitute and solve for wavelength, convert to frequency by c = freq x wavelength. b. (0-E1) = ? c. delta E = E6-E4 = hc/wavelength and convert to nm.
*Saturday, April 5, 2014 at 4:51pm by DrBob222*

**Chem**

1/wavelength = 1.09737E7(1/4 - 1/25). Solve for wavelength. Note: 1/4 is 1/n^2 = 1/2^2 = 1/4 1/25 = 1/n^2 = 1/5^2 = 1/25 #2. wavelength = h/mv h I think is 6.626E-34 J.s. m and v are given. You must convert velocity to m/s.
*Friday, October 26, 2012 at 12:17pm by DrBob222*

**Physics**

What is the longest wavelength for standing sound waves in a 108.0 cm long tube that is open at both ends? What is the second longest wavelength? What is the third longest wavelength?
*Thursday, November 25, 2010 at 5:49pm by Mike*

**Chemistry**

All you need to do is to substitute the numbers in to E = hc/wavelength. 3 x 10^-19 = 6.626 x 10^-34 x 3 x 10^8/wavelength. Solve for wavelength.
*Sunday, October 24, 2010 at 1:33am by DrBob222*

**Chemistry**

1/wavelength = R(1/3^2 - 1/6^2) R = Rydberg constant. b) c = wavelength*frequency c) E = h*frequency d) You can answer this after you know the wavelength.
*Monday, May 23, 2011 at 9:52pm by DrBob222*

**chemistry**

1/wavelength = 2.180E-18*Z^2*(1/3^2-1/4^2) Z for He is 2 so Z^2 = 4. Find wavelength, then c = frequency x wavelength to convert to frequency.
*Tuesday, January 31, 2012 at 11:03pm by DrBob222*

**Chemistry**

I would do it the other way around. delta E = 2.180 x 10^-18 J*[(1/n1^2)-(1/n2^2)]. With the Balmer series, n1 is 2 and n2 is infinity. Then delta E = hc/wavelength. The reason reciprocal cm is given (cm^-1) is because wave number = 1/wavelength and many spectroscopists prefer...
*Monday, October 26, 2009 at 4:01pm by DrBob222*

**Physics wavelength problem! Please Help!**

wavelength (m) = speed (m/s) / frequency (1/s) wavelength = 3*10^8m/s / 5*10^9/s = .6 * 10^-1 = .06m = 6cm
*Thursday, March 29, 2012 at 1:59pm by Steve*

**chemistry**

A common formula to change wavelength to frequency and frequency to wavelength uses the speed of light, c. c = frequency x wavelength c = 3E8 m/s
*Monday, January 21, 2013 at 11:46pm by DrBob222*

**physics!**

A half wavelength is .1 m long A wavelength is therefore .2 meters long distance = rate * time the wave goes a wavelength in a period The period is one over the frequency.
*Saturday, March 22, 2008 at 5:41pm by Damon*

**Chemistry**

E = h*frequency or E = hc/wavelength. So high f means more energy or small wavelength = more energy. Violet is the shortest wavelength; red is longer. Green is in the middle.
*Thursday, June 14, 2012 at 11:13pm by DrBob222*

**physics**

The frequency stays the same, but, since wave speed = (wavelength)*(frequency), a) wavelength in air = V/f = 330/500 = 0.66 m b) wavelength in water = 1490/500 = ?
*Monday, April 7, 2008 at 12:26pm by drwls*

**Physics**

Energy= boltzmanns constant*speedlight/wavelength Energy= inonization energy wavelength= incoming light solve for wavelength. Remember: MEMORIZE Planck's equation energy= boltzmannconstant*frequency
*Thursday, April 22, 2010 at 10:20am by bobpursley*

**chemistry **

For the H atom, 1/wavelength = R(1/1 - 1/2^2) where R = 1.097E7 and the transition is from N = 2 to N = 1. For H like atoms, R is replaced by RZ^2 where R is 1.097E7 and Z is the nuclear charge of 3. Therefore, 1/wavelength = RZ^2(1/1 - 1/2) Solve for wavelength.
*Sunday, November 7, 2010 at 6:03pm by DrBob222*

**science**

The wavelength of the third harmonic will be 2/3 of the wavelength of the second harmonic. Since frequency is inversely proportional to wavelength for standing waves, the frequency is higher by a factor 3/2.
*Monday, April 25, 2011 at 1:03am by drwls*

**Chem**

1/wavelength = R(1/1^2 - 0) Note: that last term is 1/n^2 but if n = infinity then 1/infinity is zero. R = Rydberg constant = 1.0973E7 Solve for wavelength in meters then E =hc/wavelength to solve for energy in joules. You may want to change that to electron volts.
*Thursday, March 6, 2014 at 5:14pm by DrBob222*

**Chemistry**

It just substitution into the equation. 1/wavelength = R(1/nf^2 - 1/ni^2) 1/wavelength = R(1/4 - 1/9) for ni-3 1/wavelength = R(1/4 - 1/16) for ni=4 etc.
*Saturday, September 25, 2010 at 8:40pm by DrBob222*

**Chemistrty Help**

speed = wavelength x frequency wavelength = speed / frequency wavelength = (3 x 10^8) / (1040 x 10^3) wavelength = 288.5 metres
*Friday, October 29, 2010 at 7:24pm by John*

**Chemistry**

Are you using frequency instead of wavelength? E = hc/wavelength h = 6.626 x 10^-34 J*sec c = 3 x 10^8 m/s wavelength = 0.174 x 10^-9 meters. I find 1.14 x 10^-15 joules so I think you are off by 100.
*Wednesday, March 17, 2010 at 5:22pm by DrBob222*

**physics**

The distance between nodes of the standing wave pattern is a half wavelength. Therefore the wavelength is 2*4m/5 = 1.6m The frequency of the traveling waves is 20/4 = 5 Hz Wave speed = wavelength * frequency = __ m/s
*Thursday, April 22, 2010 at 11:34pm by drwls*

**physics**

Velocity = wavelength * frequency The velocity changes with the wavelength. Your book probably refers to a situation in which both the wavelength and frequency change.
*Wednesday, July 8, 2009 at 5:50pm by Marth*

**Chemistry**

c=wavelength x frequency. 3 x 10^8 = 1.150 x 10^6 Hz x wavelength. Solve for wavelengths)in meters). Then 200/signal wavelength = # wavelengths.
*Thursday, October 21, 2010 at 5:40pm by DrBob222*

**Science- PLEASE, this is due tomorrow for test!**

What is the section of EMS of satellite phones? What wavelength and frequency does it use? are there any dangers in using it? What is the wavelength and frequency of pagers? are there any dangers in using it? Is there any danger in using cordless phones? What is the wavelength...
*Thursday, October 23, 2008 at 12:06am by Lily*

**chemistry**

1/wavelength = R(1/n1^2 - 1/n2^2) R = Rydberg constant. I assume you have that in your text or notes. For n1 you substitute 2 and square it. For n2 substitute 7 and square it. From wavelength, you can calculate energy from E = hc/wavelength. (Note:I arranged n1 and n2 so you ...
*Monday, March 21, 2011 at 12:08am by DrBob222*

**chemistry**

First I don't think RH = 2.180E-18 J. RH = 1.09737E7 1/wavelength = 1.09737E7(1/1 - 1/9) and solve for wavelength in meters. If you want to use that 2.18E-18 J number, that can be done this way. delta E = 2.180E-18J x (1/1 - 1/9) Then E = hc/wavelength and solve for wavelength.
*Tuesday, December 4, 2012 at 6:35pm by DrBob222*

**Physics**

Since it one end is open and the other is shut, the ear canal is considered a closed pipe. We set L = 2.3cm = 0.023m. The frequency for a closed pipe is fn=n(v/4L)=v/wavelength where n=1,2,3,.. referring to the number of overtones/harmonics. L=(1/4)*wavelength so we solve for ...
*Thursday, March 24, 2011 at 10:22pm by Brittany*

**PHYSICS**

open at both ends? the tube must be lambda/2 long frequency*wavelength=velocitysound 320*2*.50=... at the the the key to the second part is to realize the fundamental, the path is one wavelength (length of tube is half that). THe second harmonic, path must be two wavelength (...
*Tuesday, August 9, 2011 at 9:57pm by bobpursley*

**Astronomy - help!**

Imagine that you have obtained spectra for several galaxies and have measured the observed wavelength of the H emission line of atomic hydrogen. The rest wavelength of H is 656.3 nanometers (nm). Your results are as follows: • Galaxy 1: Observed H wavelength is 664.7 nm • ...
*Saturday, November 29, 2008 at 4:38pm by anonymous*

**chemistry**

What do you mean by the red line being longer. Do you mean the color is still red; however, the wavelength in He is longer (greater) than the wavelength in hydrogen. The Rydberg formula is 1/wavelength = R(delta n energy) If wavelength (w) is greater for He, it means the ...
*Monday, November 15, 2010 at 11:34am by DrBob222*

**PHYSICS**

Two parallel slits are illuminated by light composed of two wavelengths. One wavelength is λA = 553nm. The other wavelength is λB and is unknown. On a viewing screen, the light with wavelength λA = 553nm produces its third-order bright fringe at the same place ...
*Tuesday, May 7, 2013 at 7:24pm by Ashley*

**Chemistry**

1313E3/6.02E23 = ?J/atom = about 2.18E-18 J/atom E = hc/wavelength 2.18E-18 = 6.626E-34*3E8/wavelength. Solve for wavelength. I obtained 9.12E-8 m and that x 10^9 for nm.
*Friday, December 7, 2012 at 12:41am by DrBob222*

**physics**

When light of wavelength 495 nm passes through a single slit of unknown width, the diffraction pattern displays a fourth-order maximum where the third minimum of light of an unknown wavelength had been observed to fall. What is the unknown wavelength?
*Monday, March 29, 2010 at 7:32pm by jibjab*

**Physics**

The information you have been given allows you to calculate the frequency and the wavelength. In fact, they have told you what the wavelength is already. The period is P = 12.85/5 = 2.57 s and the frequency is 1/P = ___ s^-1. The product of wavelength and frequency is the wave...
*Monday, November 22, 2010 at 8:40pm by drwls*

**physics**

h*c/(wavelength) = E = 10^4 eV*1.6*10^-19 J/eV = 1.6*10^-15 J You know what h and c are. Solve for the wavelength. Wavelength = h*c/E = 6.62*10^-34*3*10^8/1.6*10^-15 = 1.25*10^-10 m = 0.125 nm = 1.25 Angstroms The frequency is c/(wavelength)
*Thursday, February 16, 2012 at 10:35pm by drwls*

**Chemistry**

Convert 1.33 MeV to J, then E = hc/wavelength to find wavelength and c = frequency*wavelength to find frequency.
*Sunday, November 21, 2010 at 5:54pm by DrBob222*

**Chemistry**

Assuming that the smallest measurable wavelength in an experiment is 0.330 fm(femtometers), what is the maximum mass of an object traveling at 157 m·s^–1 for which the de Broglie wavelength is observable? mass = ? kg Chemistry - DrBob222, Monday, October 29, 2012 at 12:29am ...
*Tuesday, October 30, 2012 at 3:15pm by Anonymous*

**Chemistry**

Assuming that the smallest measurable wavelength in an experiment is 0.330 fm(femtometers), what is the maximum mass of an object traveling at 157 m·s^–1 for which the de Broglie wavelength is observable? mass = ? kg Chemistry - DrBob222, Monday, October 29, 2012 at 12:29am ...
*Tuesday, October 30, 2012 at 3:15pm by Anonymous*

**physics**

Destructive interference will occur if the difference between the distances to the two speakers is n + 1/2, where n is an integer equal to zero, or higher. When n = 0, you get the longest wavelength and lowest frequency with destructive interference. Therefore 4.6 - 3.4 = 1.2...
*Sunday, July 4, 2010 at 5:25am by drwls*

**physics**

The energy is E = h*c/(wavelength) The momentum is E/c = h/(wavelength) h is Planck's constant, which you should know or look up. It has units of energy*time The energy in a photon at that wavelength should be a few times 10^-19 J, or a few electron volts.
*Sunday, April 17, 2011 at 3:12pm by drwls*

**chemistry**

What's 1.81 aJ? Do you mean kJ so IP = 1810 J. Then 1810 = hc/wavelength. Solve for wavelength in meters and convert to nm. c = freq x wavelength will let you solve for freq. 1810 J/atom x 1E16 atoms x 0.47 = ?
*Tuesday, April 2, 2013 at 7:02am by DrBob222*

**physicss**

Which of the following is true for a photon? A photon of wavelength 3000 x 10-10 m has momentum twice than a photon of wavelength 6000 x10-10 m. A photon of wavelength 3000 x 10-10 m has momentum twice than a photon of wavelength 6000 x10-10 m. A photon of wavelength 3000 x 10...
*Sunday, February 3, 2013 at 1:36pm by physics student*

**chemistry**

I would use the following: 1/wavelength = RZ^2(1/n1^2 - 1/n2^2) R is the Rydberg constant = 1.097 x 10^7. Z for He is 2 (and that is squared). n1 = 1 n2 = infinity (which makes 1/n2^2=0). Then convert wavelength (in meters) to frequency by using c = frequency x wavelength.
*Sunday, September 19, 2010 at 1:35pm by DrBob222*

**Science please answer?**

what is the wavelength and frequency if the wavelengthis4.5x10-7 Show wok please (-7) You have already stated the frequency. Are you talking about light? What are the units of wavelength? meters? cm? feet/ frequency = (wave speed)/(wavelength) You can do the numbers. Make sure...
*Tuesday, November 28, 2006 at 10:32pm by Brooke*

**Science**

Does increasing the frequency of a wave also increase its wavelength? If not, how are these quantities related? high frequency. low wavelength That answer may be confusing. A high frequency has a short wavelength; i.e., 14 MHz is about 40 meters. 28 MHz is abouat 10 meters. 50...
*Tuesday, January 30, 2007 at 12:37pm by Tammy*

**Chem**

which of the following statements is true regarding electromagnetic radiation? Options: 1. electromagnetic radiation with a wavelength of 600 nm travels faster than that with a wavelength of 400 nm. 2. the frequency of electromagnetic radiation determines how fast it travels. ...
*Tuesday, July 13, 2010 at 11:53pm by Ally*

**Physics (Simple Frequency Question) Reply SOON!**

I know that... wavelength = velocity * frequency frequency = velocity/wavelength If I have the voltage and the wavelength, does the voltage count as the velocity to find the frequency? If not, how do I find the frequency when I know the intensity, wavelength, and voltage? Thanks!
*Friday, May 8, 2009 at 7:56pm by Judy*

**physics - SHM**

Two sinusoidal waves with identical wavelengths and amplitudes travel in opposite directions along a string with a speed of 11 cm/s. If the time interval between instants when the string is flat is 0.33 s, what is the wavelength of the waves? wavelength = (wave speed) / (...
*Saturday, April 14, 2007 at 3:51pm by COFFEE*

**physics**

a) There are three half-waves on the string, so the wavelength on the string is 50 cm. b) Speed = wavelength*frequency c) Air wavelength = (Sound speed in air)/frequency = (340 m/s)/880 Hz = 0.386 m
*Monday, December 26, 2011 at 9:03pm by drwls*

**fsu**

Red light has a wavelength of 691 nm. Convert this wavelength to meters.
*Monday, October 10, 2011 at 1:09pm by dexter*

**Chemistry**

E = hc/wavelength wavelength must be converted to m. E is in joules. Convert to eV.
*Monday, October 31, 2011 at 2:40pm by DrBob222*

**chemistry**

wavelength = h/mv mass in kg. v in m/s. wavelength in meters. h is Planck's constant
*Monday, November 28, 2011 at 8:01pm by DrBob222*

**Chemistry!**

Calculate wavelength from c = frequency*wavelength, then 1/w = 1.097E7(1/n - 1/4^2) Solve for n. w must be in meters.
*Wednesday, March 28, 2012 at 12:43am by DrBob222*

**Chemistry**

1/wavelength = R(1/x^2 - 1/n^2 R = 1.097E7 n = 5; n^2 = 25. Solve for x. wavelength must be change to meters.
*Friday, June 8, 2012 at 2:48pm by DrBob222*

**Chemistry**

wavelength = h/mv Substitute wavelength (in meters) with v = m/s and solve for mass in kg.
*Sunday, October 28, 2012 at 8:33pm by DrBob222*

**Chemistry**

wavelength = h/mv You know wavelength (convert to m), you know h, and you know velocity. Solve for mass (in kg).
*Sunday, March 24, 2013 at 10:52pm by DrBob222*

**Physics**

each node is 1/2 wavelength apart, so wavelenth is 24m velociy=frequency*wavelength
*Wednesday, July 17, 2013 at 6:58pm by bobpursley*

**chemistry**

The de Broglie wavelength. wavelength = h/mv Remember m must be in kg.
*Wednesday, August 7, 2013 at 1:48pm by DrBob222*

**Chemistry**

But we supposed to determinate wavelength Are you saying that electron wavelength is invalid here?
*Sunday, October 13, 2013 at 4:44am by guest*

**science**

c = wavelength x frequency c 3 x 10^8 m/s E = hc/wavelength. h = Planck's constant.
*Tuesday, November 3, 2009 at 10:17pm by DrBob222*

**physics, again**

E = h*c/(wavelength) c is the speed of light and h is Plank's #. Solve for the wavelength
*Thursday, October 21, 2010 at 12:58pm by drwls *

**Chemistry**

1/wavelength = R(1/1^2 - 1/5^2) Look up the Rydberg constant and solve for wavelength.
*Tuesday, November 2, 2010 at 12:51am by DrBob222*

**chemistry**

E = hc/wavelength. This will give you wavelength in m if you plug h and c in with the correct units.
*Thursday, April 7, 2011 at 3:33pm by DrBob222*

**physics **

freq*wavelength= speed of light solve fodr wavelength.
*Monday, April 18, 2011 at 9:08pm by bobpursley*

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