1. physics ---- really dnt get this at all

    Will the photoelectric effect change for different targets

    asked by ashley --- HELP PLEASEE!!! on May 2, 2011
  2. physics

    Will the photoelectric effect change for different targets

    asked by ashley --- HELP PLEASEE!!! on May 2, 2011
  3. science

    Define the photoelectric effect?

    asked by niraj on February 2, 2017
  4. Physucs

    What model of light does the photoelectric effect support?

    asked by Beth on April 4, 2008
  5. chemistry

    apply quantum theory to explain the photoelectric effect

    asked by Anonymous on December 2, 2010
  6. Physics

    In the photoelectric effect, what determines the number of ejected electrons?

    asked by Rob on April 4, 2008
  7. physics science

    The photoelectric effect occurs only when the incident light has more than a entain minimum

    asked by Tammie Mitchell on July 14, 2011
  8. Physics

    In the photoelectric effect, what determines the kinetic energy of the ejected electrons?

    asked by Rob on April 4, 2008
  9. Physics

    In the photoelectric effect, what happens to the stopping voltage when the light frequency is decreased?

    asked by John on June 11, 2011
  10. Physics

    How do observations of the photoelectric effect conflict with the predictions of classical physics?

    asked by Brent on May 21, 2014
  11. Physics

    Explain how the photoelectric effect is used to open automatic dooes when someone approaches.

    asked by Dallas on April 1, 2008
  12. Chemistry

    Please explain what is the photoelectric effect and how light has particle-like properties? I do not understand.

    asked by Tatiyana on November 3, 2017
  13. physics

    what would be the significance of the photoelectric effect graph if it a) passed through the origin b) had a positive y intercept

    asked by tan on April 28, 2010
  14. college: Chemistry

    I need help on this homework problem and I do not understand how to work on it. Please help me with this problem. The photoelectric work function of a metal is the minimum energy needed to eject an electron by irradiating the metal with light. For calcium,

    asked by Mai on February 15, 2009
  15. english

    I'm having trouble paraphrasing this: Einstein used his light-quantum hypothesis to explain another important puzzle, the photoelectric effect. Can you help?

    asked by Anonymous on May 11, 2008
  16. chemistry

    which of the following processes is more easily observable for light with a short wavelength? a. the photoelectric effect b. radio transmission c. diffraction d. interference

    asked by sofia on January 13, 2012
  17. Physics

    What is the threshold frequency for the photoelectric effect on lithium (phi= 2.93eV)? What is the stopping potential if the wavelength of the incident light is 400nm?

    asked by Paul on September 23, 2014
  18. Physics

    What is the threshold frequency for the photoelectric effect on lithium (phi= 2.93eV)? What is the stopping potential if the wavelength of the incident light is 400nm?

    asked by Tom on September 23, 2014
  19. Physics

    What is the threshold frequency for the photoelectric effect on lithium (phi= 2.93eV)? What is the stopping potential if the wavelength of the incident light is 400nm?

    asked by Paul on September 23, 2014
  20. Physics

    The minimum frequency for the photoelectric effect of a zinc plate is 9.7 × 1014 Hz. What will be the kinetic energy of an ejected electron when a photon with a wavelength 200 nm (2.00 × 10 7 m) strikes it?

    asked by Pat on May 27, 2012
  21. Math

    A shooting game has 10 targets. The player has 10 arrows. In order to win the game, the player must shoot all 10 targets. What is the probability of shooting all 10 targets?

    asked by Anonymous on August 27, 2014
  22. physics

    Which of the following was explained by the Bohr atom? 1. atomic spectra 2. the fact that most of the mass of an atom is in the nucleus 3. nuclear fission 4. the photoelectric effect

    asked by Andrew on January 22, 2014
  23. chemistry

    what is the minimum frequency that will produce the photoelectric effect for rubidium(Rb)? (if it matters the frequency=5.2E24Hz or greater and I'm solving for the binding energy)

    asked by Brooke N on November 11, 2015
  24. chemistry

    We conduct an experiment by shining 500 nm light on potassium metal. This causes electrons to be emitted from the surface via the photoelectric effect. Now we change our source light to 450 nm at the same intensity level. Which of the following is the

    asked by bill on September 3, 2010
  25. physics

    Which of the following confirms the wave nature of particles? a. Photoelectric effect b. Rutherford's alpha scattering experiment c. de Broglie waves d. Young's double slit experiment

    asked by ashley -- on April 28, 2011
  26. physics

    In the photoelectric effect, does brightness or frequency determine the Kinetic energy of the ejected electrons? Which determines the number of the ejected electrons?

    asked by coach on December 5, 2009
  27. Physics

    The work function for potassium and cesium are 2.25 and 2.14 eV, respectively. a) Will the photoelectric effect occur for either of these elements with incident light of wavelength 565 nm? b) With light of wavelength 518 nm ?

    asked by Vanda on March 18, 2011
  28. physics

    Is the photoelectric effect a direct consequence of the wave character of E.M radiation or of the particle character of E.M radiation?

    asked by JAY on December 7, 2016
  29. College physics

    Gun sights are adjusted to aim high to compensate for the effect of gravity, effectively making the gun accurate only for a specific range. (a) If a gun is sighted to hit targets that are at the same height as the gun and 100.0 m away, how low will the

    asked by keith on June 25, 2017
  30. chemistry

    Ok so im just totally confused because i don't technically have chemistry teacher (i have cancer so i cant go to school so while i have a teacher i can email questions to, he doesnt really help so im stuck teaching myself) & i didn't get any reference to

    asked by Ana on October 9, 2010
  31. Physics

    In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used?

    asked by Allen on April 22, 2013
  32. Physics

    In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used?

    asked by Allen on April 23, 2013
  33. psychology

    1) In 1905 Einstein interpreted the “photoelectric effect” of light, a phenomenon that cannot be explained by the wave theory of light. (2) When a photon strikes an electron, the resulting action is analogous to the collision of billiard balls. (3) The

    asked by Sara on March 1, 2010
  34. com220

    1) In 1905 Einstein interpreted the “photoelectric effect” of light, a phenomenon that cannot be explained by the wave theory of light. (2) When a photon strikes an electron, the resulting action is analogous to the collision of billiard balls. (3) The

    asked by Sara on March 1, 2010
  35. english - 4

    (1) In 1905 Einstein interpreted the “photoelectric effect” of light, a phenomenon that cannot be explained by the wave theory of light. (2) When a photon strikes an electron, the resulting action is analogous to the collision of billiard balls. (3)

    asked by rose- Ms. sue on May 27, 2008
  36. chemistry

    how can i compare the dual nature of light how can i describe the phenomena that can be explained only by the particle model of light. how can i empoly the quantum theory to assess the amount of energy that matter gains and loses how did Einstein utilize

    asked by dina on November 6, 2008
  37. world literature

    In the story" the Background" the type of humor the authors uses is satire. The satire is aimed at two targets: the government and art critics. Choose one of these targets and explain how satire is used to make fun of it. Use examples from the story to

    asked by Shawnda on July 25, 2012
  38. Chemistry

    refer to the reaction 2NH3 (g) ↔ N2 (g) + 3H2 (g), and ΔH = 92.2 kJ. 1.What will be the effect on the concentration of H2 if the temperature decreases? A. H2 concentration will decrease. B. H2 concentration will not change. C. H2 concentration will

    asked by Elia on July 29, 2017
  39. Chemistry

    It takes 254 kJ/mol to eject electrons from a certain metal surface. What is the longest wavelength of light (nm) that can be used to eject electrons from the surface of this metal via the photoelectric effect? I'd appreciate it if someone could explain

    asked by Anonymous on April 1, 2010
  40. chemistry

    According to the experiments concerned with photoelectric effect, what would inrease the kinetic energy of electron ejected from a metal surface? Decreasing the wavelength of the light, drecreasing the frequency of the light or increasing the number of

    asked by olexandra on May 10, 2010
  41. Chemistry

    Describe the effect on the concentration of the bold substance by the following change: decrease the volume The equilibrium is: 2HF(g) F2(g) + H2; change in H=536KJ F2(g) is bolded. Shouldn't F2(g) increase when voume is decreased? Why is there no change?

    asked by sh on January 19, 2010
  42. Physics

    (a) Identify the significance of scientists James Clerk in hertz’s research. (b) Explain the physics of why hertz was able to detect sparkling in small detector coil when the detector was located in the position shown on the diagram above. (c) Describe

    asked by Alfred on August 31, 2009
  43. Science

    Using a " Cause and effect map" illlustrate a rapid and slow change caused by molten rock and it's effect on Earth's surface and write a detailed description how molten rock found below the Earth's crust can cause change to Earth's surface and it's

    asked by Uzair Amin on April 1, 2010
  44. Chemistry

    What does the photoelectric effect show about the connection between light and electrons? A. Light can remove electrons from atoms. B. Electrons are composed of light. C. Light is composed of electrons. D. It takes 2 photons of light to cause 1 electron to

    asked by Morgan on December 12, 2014
  45. Microeconomics

    1. The utility function is given by: U=x+y and the budget line is x+2y=100. Then the price of good x goes up to 4. Find the Hicksian substitution effect, income effect, and total change in demand for good x from the change --- Ok i read the theory but i

    asked by Andrew on November 28, 2006
  46. Chemistry + possible answers

    for question 2c earlier - Would you describe the effect of heat on the white powders as a physical change or a chemical change? give one reason for your answer. - My sister told me the answer would be for whichever one is more difficult to reverse but I

    asked by Moira on September 11, 2008
  47. General Chemistry

    The photogenic work function of a metal is the minimum energy needed to eject an electron by irradiating the metal with light. For calcium, this work function equals 4.34 x 10^-19 J. What is the minimum frequency of light for the photoelectric effect in

    asked by Kat on January 13, 2008
  48. physics

    When any material is placed in a magnetic field, there is a slight change in the orbits of their electrons which causes a small magnetic repulsion. This effect is called a. Paramagnetism b. Ferromagnetism c. Diamagnetism d. None of the other answers e.

    asked by psych on April 22, 2019
  49. english

    how does shifting the point of view [third person to first person] change the effect on the reader It's very confusing. If a story or essay starts out in 3rd person, the reader picks up on that and expects that to continue -- a shift to another POV is

    asked by jamey on April 16, 2007
  50. Chemistry

    How would you find that water is more acidic than ammonia with out using pka values? would you use resonance effect, inductive effect, hybridization effect, or element effect?

    asked by UCI Student on June 29, 2012
  51. Chemistry(Photoelectric effect)

    I've got this question wrong 2 times now... Which of the following statements about the photoelectric effect are correct? I. If electrons are being ejected, the number of electrons ejected increases with increasing light intensity. II. The minimum energy

    asked by John on January 21, 2018
  52. Economics

    In the Monetary policy transmission mechanism, explain what could go wrong between the following points 1. Change in the monetary policy and Change in the money supply 2. Change in the money supply and Change in the aggregate demand curve Change in the

    asked by Robert on June 12, 2007
  53. economics

    When the price of summer tank tops falls and you buy more because they are relatively less expensive, this is called: a)elasticity effect b) deadweight loss effect c) income effect d) substitution effect

    asked by dave on October 5, 2009
  54. World Regional Studies/ Geography

    In January 2000, cyanide is released to the Tisza River in Hungary. Effect 1: Effect 2: Water Pollution Countries develop industries. Effect 1: Effect 2: Poland’s water in most rivers is unsafe to drink Rain washes fertilizers from fields into bodies of

    asked by Sophia on October 16, 2014
  55. Physics

    A photocell shows photoelectric effect when green light shines on it. Which of the following is correct if a green light is replaced by a blue light? Electron emission would get stopped. Electrons are emitted with more velocity. Electrons are emitted with

    asked by Tyler on October 24, 2012
  56. Chemistry

    Nitrogen dioxide is one of the components of photochemical smog. a.The energy required to split NO and O from NO2 is 305 KJ/mol. If there are 6.02E23 particles/mol, what is the energy required to do this? (I got 5.07E24) b. What is the maximum wave length

    asked by Brooke N on November 12, 2015
  57. Physics

    A photocell shows photoelectric effect when green light shines on it. Which of the following is correct if a green light is replaced by a blue light? Electron emission would get stopped. Electrons are emitted with more velocity. Electrons are emitted with

    asked by Tyler on October 25, 2012
  58. Physics

    A photocell shows photoelectric effect when green light shines on it. Which of the following is correct if a green light is replaced by a blue light? Electron emission would get stopped. Electrons are emitted with more velocity. Electrons are emitted with

    asked by Tyler on October 23, 2012
  59. science

    A photocell shows photoelectric effect when green light shines on it. Which of the following is correct if a green light is replaced by a blue light? Electron emission would get stopped. Electrons are emitted with more velocity. Electrons are emitted with

    asked by Lisa on April 18, 2019
  60. Science

    Which of the following is true regarding the organization of laminar structure in cortex? a)The output layers project only to cortical targets b)Only the input layers contain neurons c)The output layers project only to subcortical targets d) The thickness

    asked by Mwat on October 20, 2017
  61. science

    What is Spread of Effect Spread of Effect is a behavioural science term for the apparent change of errors noted just before or after a reinforced behaviour. Some think it is caused by the anticipation of positive response. For myself, I have only see it in

    asked by Dana on May 18, 2007
  62. lititure

    what are the cause and effect of these things in brave new world? In fiction, as in life, events have causes and, in turn, become causes of subsequent events. Here are some events from Brave New World. Write a sentence that describes a major cause of each

    asked by amber on November 29, 2011
  63. American History

    Which option most effectively analyzes an immediate and a long-term effect of the assassination of President Lincoln? An immediate effect was the impeachment of Vice President Andrew Johnson; a long-term effect was enhanced security measures at all public

    asked by Quinn on December 5, 2018
  64. English - Hamlet Essay

    I've been asked to write an Essay for english class on Hamlet. It sais to : Select one speech from Act IV of Hamlet and write a cause and effect essay for how it targets its audience. You may choose a target audience of any context or production of the

    asked by Aly on November 20, 2009
  65. Living environment(please check thank YOU Ms.Sue)

    Cause: When hydrochloric acid backs up into the esophagus Effect: called Acid Reflux Cause: As a result of the acidic ph in the stomach Effect: help break down food Cause: As the epigolottis covers the larynx, Effect: I NEED HELP WITH THIS Cause: when

    asked by Anna on March 14, 2012
  66. CHEMISTRY

    As you may well know, placing metal objects inside a microwave oven can generate sparks. Two of your friends are arguing over the cause of the sparking, with one stating that the microwaves "herd" electrons into "pointy" areas of the metal object, from

    asked by KTM on October 26, 2014
  67. Biology ms sue

    Hi ms sue you had answerd question abt whether culture ethic have influence over environmental ethics or vice Versa could it be that both have effect over each other ? Why only culture have effect over it ? Cause do environmental ethics change way we

    asked by Mohammad on September 13, 2013
  68. help-grammar

    can someone correct these sentences...it is urgent!thanx how much targets had company identified? why does M&A haveing slow progress? I am not sure what you are trying to say; however, I have tried to make these make sense. How many targets had the company

    asked by bill on May 2, 2007
  69. government

    when the prsident or his designee (usally secretary of states ) negotiates a treaty with a foreign country: A)the senate must approve the document for it to take effect B)both houses of congressmust approve the document for it to take effect. C) only the

    asked by Anonymous on October 1, 2008
  70. Physics -

    The work function of cesium surface is 2.0eV (a)find the maximum kinetic energy of the ejected electrons when the surface is illuminated by violet light with wavelenght = 4.13 x 10^3 Angstroom unit h = 6.63 x 10^9-34)Js (b) what is the threshold wavelenght

    asked by Sola on April 26, 2007
  71. Physiology

    Indicate the effect of the hormone on the response (increase, decrease, no effect)? 1.__________________ effect of secretion of insulin on blood glucose levels 2.__________________ effect of secretion of ADH on blood pressure 3.__________________ effect of

    asked by ivy on May 18, 2011
  72. Macroeconomics

    What does crowding-out effect in a closed economy mean in simple terms? So...if there is 0 crowding-out effect, does it means that the investment/savings stays the same? Actually... I don't see how savings is directly affected by this effect... By the way,

    asked by Anonymous on September 27, 2009
  73. Chemistry

    The photoelectric effect is a concern in space, where parts of a spacecraft exposed to the sunlight will develop a net positive charge, which can interfere with or damage sensitive cir The panels that cover the exterior of the Space Shuttle are composed of

    asked by Kara on June 22, 2017
  74. Comp 156

    What is the definition of a cause and effect essay?Describe a cause and effect situation related to the effect of video games addiction on society.

    asked by Wonk on October 19, 2011
  75. Comp 156

    What is the definition of a cause and effect essay? Describe a cause and effect situation related to the effect of video games addiction on society

    asked by Wonk on October 17, 2011
  76. Art

    For this question it asks, what types of material changes were made in building Greek temples and what effect this had on the architectural world. In my book, It says how the earliest Greek temples were made of wood or brick, which later changed to marble

    asked by Bella on May 10, 2012
  77. economics

    Question 4 (1.00 points) The multiplier effect indicates that: a. a decline in the interest rate will cause a proportionately larger increase in investment. b. a change in spending will change aggregate income by a larger amount. c. a change in spending

    asked by thabo on September 12, 2009
  78. ststistics

    A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the

    asked by stat on October 5, 2009
  79. statistics

    A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the

    asked by math for life on September 9, 2010
  80. statistics

    A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the

    asked by ronnie on November 7, 2009
  81. statistics

    A researcher conducts a t test for dependent means in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the

    asked by cheril on August 24, 2010
  82. Statistics For The Behavioral And Social Sciences

    A researcher conducts a t test for dependent menas in which it is predicted that there will be a decrease in unemployment from before to after a particular job-skills training program. The cutoff "t" needed is -1.8333. The standard deviation of the

    asked by Dee Sanders on May 21, 2010
  83. fin 300

    4. Assume that bank has assets located in Germany worth €150 million earning an average of 8 percent. It also holds €100 in liabilities and pays an average of 6 percent per year. The current sot rate is €1.50 for $1. If the exchange rate at the end

    asked by sandy ann on January 9, 2013
  84. Physics-Please check

    If I have a diagram of Kepler's laws of planetary motion and it shows change in t1 larger than change in t2 and A1 larger than A2 and asks the question: which of the following is correct? 1.A3 = A3 2.change in t3 > change t3 3.if change t3 = change in t2,

    asked by JamieLynne on November 30, 2010
  85. Physics

    If I have a diagram of Kepler's laws of planetary motion and it shows change in t1 larger than change in t2 and A1 larger than A2 and asks the question: which of the following is correct? 1.A3 = A3 2.change in t3 > change t3 3.if change t3 = change in t2,

    asked by JamieLynne on November 30, 2010
  86. Science (Asap)

    What is the effect of a chemical change on the mass of matter?

    asked by Frances on May 3, 2011
  87. physics

    A variable capacitor is connected to an ac source. what effect does decreasing the capacitance have on the reactance and current in this circuit? Reactance Current A) increases decreases b) decreases no change c) decreases increases d) increases increases

    asked by seema on May 1, 2010
  88. History

    How did the Treaty of Versailles change Europe and effect Germany in particular? Please tell us what you know about how the treaty of Versailles changed Europe and Germany, and we'll be glad to add our comments and critique your answer. How did the Treaty

    asked by Sarah on December 30, 2006
  89. Science

    Compare the nature greenhouse effect process with the human induced. 2. What are the greenhouse gases? Which one is the biggest concern? 3. What are scientists doing to collect data? 4. What role does the carbon cycle play in this problem? 5. What are the

    asked by A on January 10, 2013
  90. language arts

    Label as Cause & Effect 1. (Effect) When dropped, cats land on their feet. (Cause) Cats are extremely agile creatures 2. (Cause) Few mammals can care for themselves at birth. (Effect) Most mammals are born immature 3. (Effect) The sun has a powerful

    asked by NEED HELP - on January 27, 2016
  91. DrBob222

    The Doppler effect is a change in the ______of a sound. pitch

    asked by Jon on April 5, 2008
  92. business

    A unilateral change of contract terms by one of the parties to a contract without the consent of other party is A. Is it Usury B. Novation C. Alteration D. OTHER Alteration which makes it void. So I think the answer is C The effects of the action in

    asked by May on April 18, 2008
  93. physics

    A variable capacitor is connected to an ac source. what effect does decreasing the capacitance have on the reactance and current in this circuit? Reactance Current A) increases decreases b) decreases no change c) decreases increases d) increases increases

    asked by seema on May 1, 2010
  94. Macroeconomics

    As an example of a price index, consider the A.C.D.P.I. (a fictitious price index). The associated basket of goods is: Good Price Coffee $8/lb. Bread $1/loaf Tea $15/lb. Aspirin $2/bottle Cola $6/case A. If the price of coffee doubles, what is the

    asked by Mary on September 15, 2015
  95. Chemistry

    what effect does a catalyst have on.. a) energy of the reactants b) enthalpy change of the reaction

    asked by Zac on April 27, 2009
  96. Geometry

    The radius of circle a (which is 6) is multiplied by 1/2. Describe the effect of the change of the area.

    asked by Emma on June 9, 2014
  97. Physics

    Electrons are ejected from a photoelectric cell with a maximum kinetic energy of 1.20 eV. If the incident light has a wavelength of 410nm, what is the work funtion?

    asked by Marium on May 18, 2010
  98. Chemistry (or Physio/Biochem)

    Asthma affects about seven percent of the population. During an asthma attack smooth muscle cells in the bronchi constrict, the airways become inflamed and swollen, and breathing becomes difficult. What effect might an asthma attack have on blood pH? A. pH

    asked by Trixie on March 14, 2010
  99. physics

    1)A wave created when two different waves meet will have an amplitude greater than the individual waves because of. A)destructive interference B)constructive interference C)antinodes D)a change in boundary I got B 2)If a wave has a period of .02 seconds

    asked by Jon on April 6, 2008
  100. ELA

    1.Which is the BEST way to improve this sentence? Our leaders believed that was the way to make the country the best it could be. A. Change believed to believe B. Change believed to did not believe C. Change make to made D. Change could be to could not be

    asked by Jaycee on January 19, 2012