Monday

July 28, 2014

July 28, 2014

Number of results: 13,064

**Chemistry!! Please help!**

If the wavelength of line B is 142.5 nm, calculate the wavelength of line A. Line A is the transition of n=6 to n=3 Line B is the transition of n=5 to n=3
*October 21, 2008 by Robin*

**Math (Sue)**

3.142 (1.926^2 - 1.315^2) 3.142 (3.71 - 1.73) 3.142 (1.98) Area= 6.2cm^2
*August 5, 2009 by Keisha*

**Chemistry**

The hydrogen atomic emission spectrum includes a UV line with a wavelength of 92.3 nm. Is this line associated with a transition between different excited states or between an excited state and the ground state? What is the value of n1 of this transition? What is the ...
*October 22, 2011 by Anonymous*

**physics**

The yellow line emitted by a helium discharge tube in the laboratory has a wavelength of 587 nm The same yellow line in the helium spectrum of a star has a measured wavelength of 590 nm. Calculate the speed of the moving star.
*December 14, 2012 by amy *

**chemistry**

A line in the infrared region of the hydrogen spectrum has a wavelength of 1.875 micro meters. What is the transition responsible for this wavelength?
*February 25, 2012 by Jimmy*

**Chemistry**

A line in the infrared region of the hydrogen spectrum has a wavelength of 1.875 micro meters. What is the transition responsible for this wavelength?
*February 25, 2012 by Jimmy*

**physics**

The spectrum of light from the galaxy M100 has a prominent dark line at a wavelength of 592.2 nm. The same spectral line observed in a lab on earth has a wavelength of 589.4 nm. How fast is M100 moving relative to earth? (the speed of light = 3.00 x 108ms-1)
*January 29, 2010 by Mota*

**chem**

What is the wavelength (in nm) of the line in the spectrum of the hydrogen atom that arises from the transition of the electron from the orbital with n =5 to the orbital with n = 2? Note, the line corresponds to the energy of the photon that is emitted in the transition. 4.34 ...
*October 26, 2012 by Anonymous*

**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 • ...
*November 29, 2008 by anonymous*

**Chem**

Hello What is the wavelength (in nm) of the line in the spectrum of the hydrogen atom that arises from the transition of the electron from the orbital with n =5 to the orbital with n = 2? Note, the line corresponds to the energy of the photon that is emitted in the transition...
*October 26, 2012 by Anonymous*

**chemistry**

An electron of wavelength 1.74*10-10m strikes an atom of ionized helium (He+). What is the wavelength (m) of the light corresponding to the line in the emission spectrum with the smallest energy transition?
*March 23, 2013 by Maikol*

**chemistry**

An electron of wavelength 1.74*10-10m strikes an atom of ionized helium (He+). What is the wavelength (m) of the light corresponding to the line in the emission spectrum with the smallest energy transition?
*March 25, 2013 by James*

**chemistry**

An electron of wavelength 1.74*10-10m strikes an atom of ionized helium (He+). What is the wavelength (m) of the light corresponding to the line in the emission spectrum with the smallest energy transition?
*March 25, 2013 by James*

**Physical Chemistry**

An electron of wavelength 1.74*10-10m strikes an atom of ionized helium (He+). What is the wavelength (m) of the light corresponding to the line in the emission spectrum with the smallest energy transition?
*March 23, 2013 by Echoes*

**grade 10 math**

on a line the distance between 2x and 7x plus 80 is 142. Solve for x
*June 18, 2013 by kim*

**chemistry**

A particle wavelength (λp) of a proton is 10-12m. What is the velocity of this proton [m/s]? To achieved the velocity that you just computed, what must have been the potential difference (V) through which the proton was accelerated? An electron of wavelength 1.74*10-10m ...
*March 23, 2013 by schoolgirl*

**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 ...
*December 7, 2012 by Sarah*

**Chem**

A line in the hydrogen atomic line spectrum has a wavelength of 486 nm. What is the frequency of this light (in Hz)?
*July 17, 2011 by Sam*

**chemistry**

Atomic hydrogen produces well-known series of spectral lines in several regions of the electromagnetic spectrum. Each series fits the Rydberg equation with its own particular n sub 1 value. Calculate the value of n sub 1 (by trial and error if necessary) that would produce a ...
*November 9, 2008 by Mark*

**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 ...
*November 30, 2012 by joane *

**Electrical**

A matching network consists of a length of T-line in series with a capacitor. Determine the length(in wavelength) required of the T-line section and the capacitor value needed (at 1 GHz) to match a 10-j35 ohm load impedance to the 50 ohm line.
*November 13, 2008 by Anonymous*

**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, ...
*February 2, 2013 by Cassie*

**Physics Help**

A graph of wavelength vs. 1/frequency should be a straight line. What are it's slope and y-intercept? I'm not given any graphs or numbers, just this question. And I know that Velocity = frequency x wavelength And that slope is found by rise/run and m= y2-y1/x2-x1 obviously. So...
*April 3, 2014 by Eiban*

**physics**

The Kâ characteristic X-ray line for tungsten has a wavelength of 1.94 10-11 m. What is the difference in energy between the two energy levels that give rise to this line? Express this in each of the following units. (a) joules (b) electron volts
*April 22, 2012 by Jason*

**physics**

The Kâ characteristic X-ray line for tungsten has a wavelength of 1.94 10-11 m. What is the difference in energy between the two energy levels that give rise to this line? Express this in each of the following units. (a) joules (b) electron volts
*April 22, 2012 by jason*

**physics**

A spectral line is emitted when an atom undergoes tranisition between two levels with a difference in energy of 2.4eV.What is the wavelength of the line (a)287nm(b)507angstrome units()377angstrome units(d)518nm
*September 22, 2013 by physics*

**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 ...
*April 13, 2008 by Sandhya*

**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
*July 8, 2009 by Anonymous*

**Physics**

Monochromatic light of wavelength 550 nm passes through a diffraction grating that has 55000 lines/m. A bright line appears on the screen at an angle of 12.23o from the central bright fringe. What is the order of this bright line? 5 6 7 8
*October 31, 2012 by Ashley*

**physics**

The ionisation potential of atomic hydrogen is 13.6 eV. A strong emission line in the spectrum of atomic hydrogen occurs at a wavelength of 121.6 nm. Deduce the initial and final values of the quantum number n for this spectral line.
*May 17, 2011 by Olivia*

**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...
*February 3, 2013 by physics student*

**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) / (...
*April 14, 2007 by COFFEE*

**physics **

Monochromatic light of wavelength 550 nm passes through a diffraction grating that has 55000 lines/m. A bright line appears on the screen at an angle of 12.23o from the central bright fringe. What is the order of this bright line? Choose one answer. a. 5 b. 6 c. 7 d. 8
*April 30, 2011 by ashley --*

**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?
*November 25, 2010 by Mike*

**chem need help**

The most prominent line in the atomic spectrum of mercury occurs at a wavelength of 253.652 nm. What is the energy of 0.625 moles of photons associated with the most prominent line? Express answer in kJ. ANS: 295 kJ Please explain.. Thank you so much!
*October 20, 2012 by Kjd*

**Physics-Astronomy**

A high-velocity star HVS 1 is moving at 600 km/s, 0.2% speed of light. Assuming the HVS 1 is moving away from us, and that its velocity is oriented entirely along our line of sight, determine the Doppler shift of the Ha spectral line (6562.8 Angstrom) produced by this star. Is...
*November 16, 2009 by Mark*

**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 ...
*October 30, 2012 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 ...
*October 30, 2012 by Anonymous*

**chemistry**

help needed in drawing the diagram to show how hydrogen has numerous spectral lines I also need help with this question.... ---------------- ---------------- ---------------- ---------------- ---------------- -------------------- Each line above represents an energy level for ...
*February 6, 2007 by ruby*

**Math!!**

If 1800 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box Volume=____________ I did sqrt(1800)=42.4264 and then 42.4264/3= 14.142 cm then 14.142^(3) and got volume= 2828.34575 however is ...
*November 29, 2009 by Anonymous*

**Reading**

Which line in the poem contains an example of onomatopoeia? A. Line 6 B. Line 7 C. Line 14 D. Line 15 Line 6: and you'll forget all about that broccoli you chop Line 7: Rock candy looks like beautiful glass Line 14: but spinach tastes all gritty and sandy Line 15: Taffy is ...
*November 14, 2011 by Bob*

**READING **

Which line in the poem contains an example of onomatopoeia? A. Line 6 B. Line 7 C. Line 14 D. Line 15 Line 6: and you'll forget all about that broccoli you chop Line 7: Rock candy looks like beautiful glass Line 14: but spinach tastes all gritty and sandy Line 15: Taffy is ...
*November 14, 2011 by Bob*

**geometry**

ok what is the value if x (2x+24) degrees on the top of the lines that form a X and on the other side of the angle is 142 Degrees.. I know you have to have 180 degrees but those x's confuse me. I have this figure out and narrowed down to two answers.... 118 or 59 so if you ...
*November 28, 2011 by Cindy*

**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...
*October 23, 2008 by Lily*

**chemestry**

what is the wavelength of the energetic spectral line in the ultraviolet series of the h atom and how to find it
*September 14, 2009 by sam*

**chem**

determine the wavelength of the line in the emission spectrum produced by an electron transition He+ from ni= 4 to nf= 2.
*April 6, 2011 by james*

**Chemistry**

What is the Wavelength( in nm) of the least energetic spectral line in the infrared series of the H atom? I don't understand how to find the least energetic spectral line?
*September 10, 2011 by Grace*

**Physic **

A sodium-vapour lamp illuminates, with monochromatic yellow light, two narrow slits that are 1.00 mm apart. if the viewing screen is 1.00m from the slits and the distance from the central bright line to the next bright line is 0.589 mm, what is the wavelength of the light?
*August 22, 2012 by Sanaz*

**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. ...
*July 13, 2010 by Ally*

**Chemistry**

What is the de Broglie wavelength of an oxygen molecule, O2 traveling at 521 m/s? Is the wavelength much smaller or much larger than the diameter of an atom. (on the order of 100 pm) De Broglie wavelength = h/mv h = Planck's constant in J*s. m is mass in kg. v is velocity in m...
*November 3, 2007 by Lauren*

**algebra**

The table show the median home prices in Florida what is the equation of a trend line that models a relationship between time and home prices use the equation to predict the median home price in 2040? Year 1940 median price 23,800 Year 1950 median 40,900 Year 1960 median 58,...
*March 13, 2014 by snow*

**Physic **

A sodium-vapour lamp illuminates, with monochromatic yellow light, two narrow slits that are 1.00 mm apart. if the viewing screen is 1.00m from the slits and the distance from the central bright line to the next bright line is 0.589 mm, what is the wavelength of the light? can...
*August 23, 2012 by sara*

**Chemistry**

I need help with these two problems: 1.The H-Cl bond has a frequency of vibration of 8.662 multiplied by 10^13 Hz. What wavelength (in µm) corresponds to that frequency? -is the answer just (3.00x10^8 m*s)/(8.662x10^13 s^-1) 2.A flame has a characteristic color due to ...
*November 4, 2008 by AJ*

**astronomy**

A line in star's spectrum lies at 400.0 nanometers. In the laboratory, that same line lies at 400.2 nanometers. How fast is the star moving along the line of sight; that is, what is its radial velocity? Is it moving toward or away from us? Since the wavelength shift is to ...
*April 27, 2007 by Sethi*

**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?
*March 29, 2010 by jibjab*

**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 ...
*May 7, 2013 by Ashley*

**Physics-Resonance**

A 3.00 m long pipe is in a room where the temperature is 20 C. What is the fundamental frequency if the pipe is closed at one end? Would this count as an open pipe still, or a closed pipe? This is what I did. Wavelength = 2L/n Wavelength = 2(3)/1 Wavelength = 6 (331 + (.6*20...
*February 14, 2011 by Dan*

**Physics**

A transmission diffraction grating with 600 lines/mm is used to study the line spectrum of the light produced by a hydrogen discharge tube with the setup shown above. The grating is 1.0 m from the source (a hole at the center of the meter stick). An observer sees the first-...
*September 16, 2011 by AfterLife*

**Math**

The number of dry cleaning orders picked up at Sunny Fresh Dry Cleaners was sampled over 12 hour periods. Below is the sample: 142 171 125 91 140 125 97 125 162 142 125 117 89 125 140 128 From this data set, compute the sample mean, median, mode and midrange. Compute the 1st ...
*July 29, 2011 by Jen*

**chem**

calculate the wavelength of the green line in the visible spectrum of excited H atoms using Bohr Theory
*November 7, 2011 by kris*

**physics**

Tweety Bird hops up and down at a frequency of 0.4 Hz on a power line at the midpoint between the poles, which are separated by 18 m. Assuming Tweety is exciting the fundamental standing wave, find the speed of transverse waves on the power line. (Hint: What is the wavelength ...
*April 25, 2012 by michelle*

**Social Studies (MAPS)**

grid north is west of true north by 0 degrees, 57 minutes, which is equal to 17 mils. (There are 6,400 mils in a circle.) Magnetic north is east of true north by 8 degrees, which is equal to 142 mils. *B. What is the difference (in degrees and minutes) between true north (...
*May 9, 2010 by Lisa*

**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...
*November 28, 2006 by Brooke*

**Chemistry**

How do I calculate the wavelength of the emission line when electrons drop from the 4th to the 3rd energy level in the hydrogen atom?
*February 9, 2011 by Lis*

**astronomy**

Imagine that you live in a distant galaxy far far away. This galaxy is in a different universe, and so may have different cosmology. It seems that in this distant universe, all galaxies have the same luminosity, which you have worked out is 7.0*10^30 W. You are studying a ...
*April 11, 2014 by keitanako*

**Standing waves and resonance (physics)**

A nylon string has a linear density of 7.2g/m and is under a tension of 150N. The fixed supports are 90cm apart. The string is oscillating in the standing wave pattern. Find a)speed b)wavelength c) frequency v=sqr(F/u(linear density) v=sqrt(150N/7.2g/m) = 4.56m/s b) wavelength...
*February 6, 2007 by Susane*

**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...
*January 30, 2007 by Tammy*

**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!
*May 8, 2009 by Judy*

**Physics**

I need help solving this please! I think that for part (b) I can use energy and wavelength to solve for frequency and the one with the highest frequency is the most damaging, but I'm not sure what to do for part (a). You want to study a biological specimen by means of a ...
*August 15, 2010 by Brianna*

**unsolved mysteries astrophysics**

Q3.2 COLLAPSE TIMESCALE (5 points possible) Imagine that you live in a distant galaxy far far away. This galaxy is in a different universe, and so may have different cosmology. It seems that in this distant universe, all galaxies have the same luminosity, which you have worked...
*April 15, 2014 by JuanPro*

**fsu**

Red light has a wavelength of 691 nm. Convert this wavelength to meters.
*October 10, 2011 by dexter*

**Physics**

If a metal with a threhold frequency of 1.1 x 10^15 Hz is illuminated by light with a wavelength of 170 nm, then the maximum kinetic energy of the emitted photoelectron will be? this is my solution: h= 6.63 x 10^ -34 J.s c = 3 x 10^8 m/s Wavelength= 1.7 x 10^-7 m Threshold ...
*June 24, 2010 by Marium*

**precalculus**

what is an expression of x(line cross) involving r(line),s(line) and t(line). answer: 3r(line)-s(line)+t(line) In the drawing there are 3r's, -s, t,and x. All vectors are going in the same direction. is the answer correct?
*November 21, 2008 by Mary*

**physics**

A certain radio wave has a frequency of 2.0*10^6 Hz. What is its wavelength? c=3*10^8 m/s wavelength = 3*10^8 _______ 2*10^6 = 150 m is this done correctly?
*March 14, 2009 by physics*

**Chemistry**

calculate the wavelength of the second line in the Brackett series (nf=4) of the hydrogen emission spectrum. Rh= 2.180e-18 any help please? i know its energy levels 4 to 6... but that is all.
*September 24, 2007 by Lily*

**Chemistry**

What is the wavelength of a proton traveling at a speed of 6.21 km/s? What would be the region of the spectrum for electromagnetic radiation of this wavelength. How do I do this
*November 1, 2007 by Lauren*

**math**

jenny had driven for 2h at a constant speed when road forced to reduce her speed by 10 mp/h for the remaining 1h of 152 mile trip. find her original speed 152 - 10 = 142/2 = 71 mp/h Can 71 mi/hr be right for the first speed? 71 mi/hr x 2 hrs = 142 miles traveled. 10 mi/hr x 1 ...
*November 28, 2006 by koleo*

**astrophysics**

If the wavelength of Hydrogen is 21.10611405413 cm, what is the wavelength of oxygen in cm?
*March 5, 2011 by james*

**Chemistry (Electrons in Atoms)**

The wavelength of visible light varies from 0.40 μm to 0.70 μm as the color of the light changes from violet to red. Calculate the energy of a photon whose wavelength is 0.67 μm HINT: From the wavelength and the speed of light, we can get the frequency. Then the...
*May 23, 2011 by Katie*

**Chemistry**

Covalent bonds in a molecule absorb radiation in the IR region and vibrate at characteristic frequencies. a) The C---O bond absorbs radiation of wavelength 9.6um. What frequency (in s-1) corresponds to that wavelength? b) The H---Cl bond has a frequency of vibration of 8....
*September 8, 2011 by Grace*

**science**

calculate the ratio of wavelength o mth line of lyman series and balmer series of H-atom
*September 8, 2012 by harsimranjit*

**Chemistry**

Suppose that absorbances of several solutions were measured at 545 nm. What is the frequency of this wavelength? What is the energy of this wavelength? (h=6.626 times 10^-34J*S)
*December 6, 2012 by Anon*

**Please Chemistry Help**

for the transition of an electron in a hydrogen atom between the principal quantum number levels 4 and 3, calculate a) the energy released b) the wavelength of the line in the spectra.
*April 6, 2012 by Amber*

**Chemistry**

calculate the wavelength in nm of the spectral line produced when an electron in an hydrogen atom undergoes the transition from n=3 to n=2. I get 6.56x10^-7 meters and 6,561.68 nm but that is not the right answer...help please!
*January 14, 2013 by Jana*

**math**

line L bisects and is perpendicular to line AB and line CD. Line AB = CD line AB = 140 and line LM = 24 what is the lenght of line NQ
*June 27, 2013 by debra*

**science**

The brightest galaxy in the Bootes cluster of galaxies is found to have a redshift of 0.13. (Assume the speed of light, c, is 3.0 × 10 8 m s−1.) (i) Assuming the Hubble constant, H0, is 70 km s−1 Mpc−1 to two significant figures, calculate the distance to ...
*August 22, 2011 by mj*

**Microbiology**

what is the best resolution of our light microscopes the formula should be RP = wavelength/2NA right?? so my question is which wavelength do i put as the denominator
*September 22, 2009 by lyne*

**Chemistry**

Titanium (6.94x10^-19) and silicon (7.77x10^-19) surfaces as irradiated with UV radiation with a wavelength of 231 nm. what is the wavelength of the electrons emitted by the titration surface?
*April 9, 2012 by Tiffany*

**Physics**

A violin string is .32m and has a mass of .0005kg. The freqency of the note played is 440Hz. What is the speed of the wave in the string? .5*wavelenght = L wavelength= 2*.32m =.64m v=f(wavelength) =440hz*.64m =281.6m/s b) where must one put one's finger to play a note with a ...
*March 3, 2008 by Andrea*

**Chemistry**

Under the correct conditions, the element molybdenum emits X-rays with a characteristic wavelength of 0.711A (7.11*10^-11m). These X-rays are used in diffraction experiments to determine molecular structures. How fast does an electron need to be moving to have the same ...
*November 14, 2009 by C.*

**Chemistry**

What is the wavelength of a proton traveling at a speed of 6.21 km/s? What would be the region of the spectrum for electromagnetic radiation of this wavelength. For this one I did the same thing 6.63 X 10^-34/ (? kg)(6210 m/s) = How do get the kg for the problem
*November 3, 2007 by Lauren*

**Physics**

GSM networks use microwaves of 20 cm in wavelength. What is the energy carried by one trillion (10^12) photons of this wavelength is? I got 10^-13 J, but this is apparently wrong. Please help!
*March 13, 2010 by Johnny*

**Chemistry**

Assuming that the smallest measurable wavelength in an experiment is 0.410 fm (femtometers), what is the maximum mass of an object traveling at 815 m*s^-1 for which the de Broglie wavelength is observable?
*November 2, 2011 by Casey*

**Chemistry**

Assuming that the smallest measurable wavelength in an experiment is 0.410 fm (femtometers), what is the maximum mass of an object traveling at 395 m·s–1 for which the de Broglie wavelength is observable?
*March 24, 2013 by marie darling*

**chemistry**

Assuming that the smallest measurable wavelength in an experiment is 0.990 fm (femtometers), what is the maximum mass of an object traveling at 269 m·s–1 for which the de Broglie wavelength is observable?
*November 1, 2013 by brianna*

**Physics**

Is this statement correct: When part of sound travelled through water, wavelength and speed of sound would change because since the particles are closer together in water than in air, the speed of sound would increase which in turn would decrease the wavelength according to ...
*March 8, 2009 by Lena*

**math**

graph the line with slope 1/2 passing through the point(-5,-2) find the slope of the line 5x+5y=3 write answer in simplest from consider the line 2x-4y=4 what is the slope of a line perpendicular to this line. what jis the slope of a line parallel to this line
*February 10, 2013 by Anonymous*

**science**

Th energy associated with the absorption of a photon of wavelength 15.00 micrometers is _________J. Energy= Plancksconstant*frequency= =plancksconstant*speed of light/wavelength. wavelength= 15*10^-6 meters speed of light= 3*10^8 meters/second Plancks constant...look it up. I ...
*August 1, 2005 by Tahira*

**chemistry**

Hydrogen exhibits several series of line spectra in different spectral regions. For example the Lyman series (nf = 1 in Balmer-Rydberg equation) occurs in the ultraviolet region while the Balmer (nf = 2) series occurs in the visible range and the Paschen (nf = 3), Brackett (nf...
*November 10, 2013 by a.m*

**physics**

If you are sitting at home in your room, the walls please help me pick one best answer of the followings. 1. emit visible light with a peak wavelength close to 0.5 micrometer. 2. emit thermal radiation in the near infrared with a peak wavelength close to 1 micrometer. 3. emit ...
*October 4, 2011 by ice cream*

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