how does light intensity and the rate of photosynthesis relate to the position of the sun during the year?

37,654 results
  1. Science

    Which of the following sets of words can be used to describe the outputs of photosynthesis? water, glucose, light energy carbon dioxide, glucose, chemical energy oxygen, glucose, chemical energy glucose, oxygen, light energy Which of the following is true

  2. algebra

    The intensity I of light bulb measured in watts per square meter (w/m^2), varies inversely as the square of the distance d from the light bulb . . suppose I is 45 w/m^2 when the distance is 5 m . find the intensity when the distance from the light bulb is

  3. Math

    The intensity of Illumination on a surface varies inversely as the square of the distance from the light source. A surface is 12 meters from a light source and has an intensity of 2. How far must the surface be from the light source to receive twice as

  4. algebra

    The light intensity of a light bulb varies inversely as the square of the distance from the light bulb. The function I(d) = k/d^2 models this situation, where I is the light intensity, d is the distance from a light source, and k is a constant. If the

  5. College Algebra

    Intensity of Light. The intensity I of light from a light bulb varies inversely as the square of the distance d from the bulb. Suppose that I is 90 W / m 2 90W/m2 (watts per square meter) when the distance is 5 m. How much farther would it be to a point

  6. Physics

    Unpolarised light of intensity 4.0Wm^−2 is incident on a polariser placed at 15∘ to the vertical. State the intensity of the transmitted light. I've tried 4 x cos(15)^2 = 3.732050808, but it says "Unpolarised light is a random mix of polarisations, so

  7. AP BIOLOGY LAB

    I am doing an ap biology lab on plant photosynthesis. It's specifically lab # 4 on plant pigments and photosynthesis and it's on question # 8 on Exercise 4B: Photosynthesis/ The Light Reaction. Identify the function of each of the cuvettes. I already have

  8. Pre Cal

    The intensity of light decreases by 4% for each meter that it descends below the surface of the water. At what depth is the intensity of light only 20% of that at the surface?

  9. Science

    HELP ASAP Which function do the stomata perform in photosynthesis?(1 point) absorbing and releasing gases capturing light energy producing glucose absorbing water Which step in photosynthesis does not need light?(1 point) Water splits into hydrogen and

  10. Science, plz,plz help

    Which of the following illustrates the energy changes taking place during photosynthesis? light energy from sun ¨ chemical energy in bonds of glucose chemical energy in bonds of glucose ¨ light energy from sun light energy from sun ¨ chemical

  11. Calc

    The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function below, where I is the light intensity (measured in thousands of foot-candles). P = (120 I) / (I^2 + I + 1) For what light intensity

  12. Math - Logorithms

    The intensity, I, of light, in lumens, passing through the glass of a pair of sunglasses if given by the equation I(x) = I^o(0.8)^x, where x is the thickness of the glass, in millimeters, and I^o is the intensity of light entering the glasses. How thick

  13. science

    6. About 90% of all marine organisms live in the upper 180 m of the ocean. How does temperature and light intensity influence this fact? (What does temperature and light intensity have to do with where ocean life is located?)

  14. Biology

    All of the following statements are true EXCEPT Thylakoid membranes contain photosynthetic pigment The O2 released during photosynthesis comes from water G3P is produced only in the light reactions of photosynthesis The light reactions of photosynthesis

  15. Physics

    The average intensity of sunlight at earth's surface is approximately 1400 W/m^2 , if the Sun is directly overhead. The average distance between the earth and the sun is 1.50E11 m. What is the average power emitted by the Sun? Ok so intensity is power over

  16. Physics

    A beam of partially polarized light can be considered to be a mixture of polarized and unpolarized light. Suppose a beam of partially polarized light is sent through a polarizing filter. The polarization direction of the filter can be changed by rotating

  17. Physics

    There are two polarizing filters that are out of alignment by 30 degrees. If the light of intensity 1.00 W/m^2 and initially polarized half-way between the two filters passes through the two filters, what is the intensity of the transmitted light? I know

  18. chemistry

    A photocell is a device used to measure the intensity of light. In a certain experiment, when light of wavelength 530 nm is directed on to the photocell, electrons are emitted at the rate of 5.1 10-13 Coulombs/sec. Assume that each photon that impinges on

  19. math

    The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function P = 100I / I2 + I + 9 where I is the light intensity (measured in thousands of foot-candles). For what light intensity is P a

  20. Biology

    Why does an increase in light intensity cause the rate of photosynthesis to increase?

  21. bio 100

    2. Photosynthetic saturation is the maximum rate of photosynthesis. What value of light intensity produced photosynthetic saturation in corn leaves?

  22. Biology 1

    Does anyone know of a Photosynthesis concept map that includes all of the following: Photons, thylakoids, reactions, sun, NADPH, carbohydrates, xanthophyll, wavelength, pigments, stroma, product, photosynthesis, NADP+, visible light, glucose, energy,

  23. Precalc

    Can someone please help me? I don't know how to solve for time under 23 units. When I try I think I get the answer for above 23 units and when I try to subtract from the whole period my answer is wrong. The correct answer is 5.1337 hours. Fidel is

  24. Pre-Calc

    The intensity I of light received from a source varies inversely as the square of the distance d from the source. If the light intensity is 5 foot-candles at 17 feet, find the light intensity at 16 feet.

  25. college algebra

    Use a calculator to help solve the problem. The intensity I of light (in lumens) at a distance x meters below the surface is given by I = I0 k x, where I0 is the intensity at the surface and k depends on the clarity of the water. At one location in the

  26. Math

    the intensity l of light from a light bulb, measured in watts per square meter (w/m^2), varies inversely as the square of the distance d from the light bulb. Suppose l is 70 w/m^2 when the distance is 5m. Find the intensity when the distance from the light

  27. math

    The intensity of I of light from a light bulb, measured in watts per square meter (w/m^2), varies inversely as the square of the distance d from the light bulb. Suppose I is 85 w/m^2 when the distance is 5m. Find the intensity when the distance from the

  28. science

    i am so confused someone please help this is a take open book test except the answer is not in the book,would a plant grown in red light do well? blue light? HELP PLEASE Think of the light spectrum from red to violet. Which has the most energy, red or

  29. physics

    unpolarized light with an average intensity of 750.0W/m^2 enters a polarizer with a vertical transmission axis. the transmitted light then enters a second polarizer. the light that exits the second polarizer is found to have an average intensity of 125

  30. 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

  31. physics

    Consider the bending of light by the gravitation of the Sun as described by Newtonian physics. Light of frequency f passes at a distance d from the center of the Sun, which has a mass M. Show that the bending angle of the light is proportional to M/d.

  32. Logarithm help please

    The intensity, I, of light passing through water can be modelled by the equation I=10^1-0.13, where x is the depth of water in metres. Most aquatic plants require a light intensity of 4.2 units for strong growth. Determine the depth of water at which most

  33. physics

    the solar energy arriving at the outer edge of earth's atmosphere from the sun has intensity of 1.4 kW/msquared. how much mass does the sun lose per day? what percent of the sun's mass is this?

  34. science

    what is photosynthesis? Photosynthesis is a process in which green plants use energy from the sun to transform water, carbon dioxide, and minerals into oxygen and organic compounds. It is one example of how people and plants are dependent on each other in

  35. algebra

    Because a stadium will be used at night, lights have been installed. The brightness (B) of a light varies directly with the intensity (I) of the light and inversely as the square of the distance (D) from the light. Brightness (B) is measured in light

  36. Science

    I did an experiment where I shine a light on a piece of paper to demonstrate how one of the earth's hemispheres tilts away from the sun and the intensity of the sunlight dims causing the seasons. The question asks to identify the two constants in the

  37. BILOGY

    how does light intensity and the rate of photosynthesis relate to the position of the sun during the year?

  38. Calculus 1

    The rate (in mg carbon/m^3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function P = (120I)/(I^2 + I + 4) where I is the light intensity (measured in thousands of foot-candles). For what light intensity is P a

  39. Calculus

    The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function P = 110I I2 + I + 4 where I is the light intensity (measured in thousands of foot-candles). For what light intensity is P a maximum?

  40. Calculus

    The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function P = 110I I2 + I + 4 where I is the light intensity (measured in thousands of foot-candles). For what light intensity is P a maximum?

  41. Advanced Functions - Grade 12

    Radiation from the sun keeps us alive, but with the thinning of the ozone layer, it is important to limit exposure. Most of us know that the sun is far more intense at the equator than at the poles. The relationship between the intensity of radiation with

  42. physics

    The light from the sun is found to have a maximum intensity near the wavelength of 470 nm assuming the surface nof the sun a s a black body the temperature of the sun is ----------

  43. physics

    The light from the sun is found to have a maximum intensity near the wave length of 470nm assuming the surface of the sun as a black body,the temperature of the sun is....

  44. college easy physics

    Help me out with 2 multiple questions!!!!!!!!!!!!!!!!! ASAP please What is flux in general? 1. A flow of energy, so heat is an example of flux. 2. Flowing matter such as a river or an air current. 3. Flowing energy or flowing matter. 4. An amount of energy

  45. physics

    The angle between the polarizer transmission axis and the plane of polarization of the incoming light is 30 +/- 2 deg. If the incident light intensity Io is 100 W/cm2 what would be the intensity I after the light is transmitted through the polarizer? What

  46. Math

    The intensity of light passing through a lens can be found using the formula I=Io - Io / csc^2 theta, where Io is the intensity of the light coming in, I is the intensity of the light that emerges or goes out of the lens, and theta is the angle between. a)

  47. biology help

    Is photosynthesis only occurring during the daytime? What happens when there is no light? What is the relationship between light dependent and light independent reactions in photosynthesis?

  48. Biology

    What is the overall chemical formula for photosynthsis? 6Co2+6H2O--->C6H12O6+6O2 Where does the energy come from in photosynthesis? From Sunlight? What is the relationship between photosynthesis and respiration Photosynthesis makes the glucose that is used

  49. math

    after passing therough a material t centimeters thick, the intensity I(t) of a light beam is given by I(t) =(4^-ct)Io, where Io is the initial intensity and c is a constant called the absorption factor. Ocean water absorbs light with an absorption factor

  50. science

    How does oxygen production relate to the rate of photosynthesis?

  51. statistics

    Some college students collected data on the intensity of light at various depths in a lake. Here are their data: Depth (meters) Light intenisty (lumens) 5 168.00 6 120.42 7 86.31 8 61.87 9 44.34 10 31.78 11 22.78 Take the natural logarithm (ln) of the

  52. Physics

    A 100 watt bulb emits light in all directions. The distance R from the bulb is equal to 1.0 meter. Complete the table below with calculated values of intensity of the bulb. Distance from Source Intensity (W/m2) R ? 2R ? 3R ? c) If the bulb was replaced by

  53. 9th grade Biology

    4. After the temperature reaches 33 degrees Celcius, the rate of photosynthesis declines. Using knowledge of enzymes, explain why this happens. 6. As the amound of CO2 increases, what would happen to the rate of photosynthesis? And as the amount of CO2

  54. Math

    Radiation from the Sunkeeps us all alive, but with the thinning of the ozone layer, it is important to limitexposure. The intensity of radiation is inverselyproportional to the square of the distance thatthe Sun’s rays travel.The formula I=k/d^2 models

  55. Physics/Algebra

    Physics: For a 225-watt bulb, the intensity I of light in lumens at a distance of x feet is I=225/x^2. a. What is the intensity of light 5 ft from the bulb? b. Suppose your distance from the bulb doubles. How does the intensity of the light change?

  56. Science

    Cave ecosystems are characterized by extremely low light levels. What role does photosynthesis play in a cave ecosystem? 1: Photosynthesis is essential because it provides the original energy source for all food chains in this ecosystem. 2: photosynthesis

  57. algebra

    Light intensity of water equation log I/12=-0.0125 What depth will the light intensity be half that of surface?

  58. physics

    Linearly polarized light is incident on a piece of polarizing material. What is the ratio of the transmitted light intensity to the incident light intensity when the angle between the transmission axis and the incident electric field is (a) 30° and (b)

  59. Physics

    We can reasonably model a 75 W incandescent light bulb as a sphere 6.0 cm in diameter. Typically, only about 5% of the energy goes to visible light; the rest goes largely to non-visible light infrared radiation. (a) What is the visible light intensity (in

  60. physical

    Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the list below which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the

  61. Urgent - physics

    Air molecules and dust particles in the atmosphere will scatter sunlight. From a consideration of the position of the sun, estimate the direction of incidence of the sun's rays on the atmosphere. In what direction will an observer on the earth's surface

  62. science

    Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the listbelow which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the

  63. physic

    Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the list below which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the

  64. physics

    Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the listbelow which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the

  65. Science (college level)

    1. What solar temp is needed for the peak intensity of radiation to occue at .2 micrometers? Remembering that humans can see light only between .4 and .7 microns, would the sun look brighter or dimmer at this new temp? 2. How much variation in earth

  66. Atmospheric Science

    1. What solar temp is needed for the peak intensity of radiation to occue at .2 micrometers? Remembering that humans can see light only between .4 and .7 microns, would the sun look brighter or dimmer at this new temp? 2. How much variation in earth

  67. Physics

    A 100.0 W light bulb hangs from the ceiling. What is the visible light intensity on the floor, 2.1 m directly below the bulb, if 10% of its output is visible light? So I am attempting to use: I= Power/area however, I don't have a radius. I know 10% of 100

  68. Physics

    Light of intensity 2 Wm^–2 is traveling through air (n = 1.0) is normally incident on a dielectric surface. If the intensity of the reflected light is 0.3 W m^–2 what is the refractive index of the dielectric material?

  69. algebra

    Light intensity(lumens) at a depth of x feet has the equation log I/12=-0.0125x what depth will the light intensity be half that of the surface

  70. Biology

    Does light wavelength affect cellular respiration rate? I know that it affects photosynthetic rate. I think it is not supposed to affect cellular respiration rate, but I recently conducted an experiment that has proved otherwise and I just want to make

  71. Physics

    A decibel meter reads 130 dB at a certain position from a jet plane when one engine is turned on. a) What is the sound intensity at that position? b) What would be the sound level at the same position if two engines are turned on each having the same

  72. Applied maths

    2. When light passes through a transparent medium, its intensity I at a depth d can be modelled using the equation where I0 is the initial intensity, and k is a constant. If the intensity of sunlight is reduced to 54% of its original value after

  73. Science

    Mr. Belvedere designs an experiment to test the effect of different colored light on the rate of photosynthesis. He sets up his experiment using elodea, 25watt bulbs, 30mL of distilled water, and 5g of sodium bicarbonate. Plant 1 is exposed to no light.

  74. physics

    How do you the relative intensity of red light with 1/λ^4? because relative intensity if blue light is 5,8. en if i do calculate that with the formula i get 1/(700)^4= 2,...

  75. physics

    Unpolarized light with an average intensity of 750.0W.m^2 enters a polarizer with a vertical trasmission axis. the transmitted light then enters a second polarizer. the light that exits the second polarizer is found to have an average intensity of 125

  76. physics

    Hello I'm having trouble with this physics question: You are examining the loss in intensity as light passes through a fibre optic cable. The input intensity is measured as 55.1 W/m2 and the output intensity as 28.7 W/m2. Calculate the attenuation of the

  77. SCIENCE

    Help. Am I right or wrong. The use of a plant crop to harness the sun's energy for conversion to energy sources is termed ___________ Bioconversion? Check these sites for your answer.

  78. science

    Why does the filament glow more brightly as the electric current in a lightbulb is increased? The glow is dependent on two things: Spectral output, and intensity. Current makes the temperature hotter, and so the spectrum is shifted from red to violet,

  79. science help plzzzzzzzzzzzzzzz?

    Sue is setting up an experiment to test whether fly maggots select a dark or a brightly lit environment. She sets up a chamber in which there is a gradient in light intensity from one end (dark) to the other (brightly lit). The experimental hypothesis was

  80. Science

    Which one is correct about Wien’s law for blackbody radiation? It gives the relationship between the maximum wavelength and intensity the temperature and intensity the range of wavelength and frequency the wavelength for its maximum intensity and

  81. Science need help

    Sue is setting up an experiment to test whether fly maggots select a dark or a brightly lit environment. She sets up a chamber in which there is a gradient in light intensity from one end (dark) to the other (brightly lit). The experimental hypothesis was

  82. algebra worksheet help please

    Fiber-optic cables are used widely for Internet wiring, data transmission, and surgeries. When light passes through a fiber-optic cable, its intensity decreases with the increase in the length of the cable. If 1,500 lumens of light enter the cable, the

  83. algebra

    Fiber-optic cables are used widely for internet wiring, data transmission, and surgeries. When light passes through a fiber-optic cable, its intensity decreases with the increase in the length of the cable. If 1500 lumens of light enters the cable, the

  84. Math

    Light passing through water loses 30% of its intensity every metre of water depth. At what depth will the light intensity be half of what it is at the surface? How is it 8.1? I don't know how. Thanks

  85. Physics

    We can reasonaly model a 75 W incandescent lightbulb as a sphere 6 cm in diameter. Typically, only about 5% of the energy goes to visible light; the rest goes largely to nonvisible infrared radiation. (a) What is the visible light intensity (in W/m^2) at

  86. Science need help

    What is the independent variable? 1 is that the correct answer help plz Sue is setting up an experiment to test whether fly maggots select a dark or a brightly lit environment. She sets up a chamber in which there is a gradient in light intensity from one

  87. Physics

    The sun is 1.40•10^11m away and light travels at 3.00•10^8m/s. Calculate how long it takes light from the sun to reach the earth. Express your answer in scientific notation.

  88. Physics

    The sun is 1.40•10^11m away and light travels at 3.00•10^8m/s. Calculate how long it takes light from the sun to reach the earth. Express your answer in scientific notation.

  89. Physics

    The sun is 1.40•10^11m away and light travels at 3.00•10^8m/s. Calculate how long it takes light from the sun to reach the earth. Express your answer in scientific notation.

  90. Physics

    The sun is 1.40•10^11m away and light travels at 3.00•10^8m/s. Calculate how long it takes light from the sun to reach the earth. Express your answer in scientific notation.

  91. modern physics

    The earth and the sun are 8.3 light-minutes apart in the same inertial frame. Two events occur at t = 0 on the earth and t = 3 minutes on the sun respectively. Calculate the time difference between the events according to an observer moving at u = 0.6c

  92. modern physics

    The earth and the sun are 8.3 light-minutes apart in the same inertial frame. Two events occur at t = 0 on the earth and t = 3 minutes on the sun respectively. Calculate the time difference between the events according to an observer moving at u = 0.6c

  93. algebra 1

    Fiber-optic cables are used widely to increase the speed and accuracy of data transmission. When light passes through a fiber-optic cable, its intensity decreases with the increase in the length of the cable. If 1700 lumens of light enters the cable, the

  94. physics ( help FAST)

    if you were to move the light sencor in an experiment 5 times further from the light as it was before, by what fraction would the light intensity change????

  95. Chemistry

    A photocell is a device used to measure the intensity of light. In a certain experiment, when light of wavelength 530 nm is directed on to the photocell, electrons are emitted at the rate of 5.1 10-13 Coulombs/sec. Assume that each photon that impinges on

  96. physics

    monochromatic light of wavelength λ=800nm illuminates normally a thin liquid film with nf =4/3 and t=500nm lying on a glass of refractive index n=2.5 The liquids refractive index can be continuously increased up to some limiting value by applying a

  97. physics

    I keep getting the wrong answer... A solar model is used to calculate the expected temperature and density at all depths within the Sun. These results are then used to calculate the expected fusion rate within the Sun. We have confidence that the model is

  98. physics

    The sun has a mass of 1.99 × 1030 kg and is moving in a circular orbit about the center of our galaxy, the Milky Way. The radius of the orbit is 2.3 × 104 light-years (1 light-year = 9.5 × 1015 m), and the angular speed of the sun is 1.1 × 10-15 rad/s.

  99. Physics 2

    The average intensity of light emerging from a polarizing sheet is 0.807 W/m2, and the average intensity of the horizontally polarized light incident on the sheet is 0.972 W/m2. Determine the angle that the transmission axis of the polarizing sheet makes

  100. Phsyics

    A source of light is used to illuminate a screen. 1m from the source, the intensity of the light falling on the screen is 12 000 lux. Calculate the intensity on the screen at distances of: a) 2m b) 3m

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