(1) (i) State five importance of photoelectric effect
(ii) state the experimental facts about photoelectric effect
In: Physics
Consider the asymmetric 1/2 harmonic oscillator. use the Variational Principle to estimate the ground state energy of this potential. Use as your trial function Axe^bx^2
In: Physics
The final product of the Calvin Cycle (the product that EXITS the Calvin Cycle, assuming successful carboxylation) is
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3-phosphoglycerate |
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glyceraldehyde-3-phosphate |
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Ribulose-1,5-bisphosphate |
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sucrose |
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starch |
To be in an active state, several enzymes of the Calvin Benson cycle require
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An oxidizing environment to create disulfide bridges (-S-S-) |
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An oxidizing environment to break disulfide bridges (-SH, -SH) |
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A reducing environment to create disulfide bridges (-S-S-) |
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A reducing environment to break disulfide bridge (-SH, -SH) |
The dry-weight mass of a plant (the weight of plant solids after water is removed) is from
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Nutrients absorbed form the soil |
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Water absorbed from the soil |
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Carbon dioxide absorbed from the soil |
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Carbon dioxide absorbed from the air |
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Water absorbed from the air |
Which statement is correct
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Blue light (λ = 420 nm) has more energy than red |
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Blue light (λ = 680 nm) has more energy than red |
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Red light (λ = 420 nm) has more energy than blue |
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Red light (λ = 680 nm) has more energy than blue |
The antennae complexes of photosynthesis gather light energy and channel it toward (choose ALL that apply)
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Photosystem I |
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Photosystem II |
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Cytochrome b6f |
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Plastoquinone/plastiquinol |
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ATPase |
Assuming linear electron flow from H2O to
NADP+
(i.e., the Z-scheme) what is the theoretical minimum number of
photons required to produce one molecule of O2 evolved
(remember each water release a pair of electrons, it takes 2
H2O to produce O2)?
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4 |
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8 |
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12 |
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10 |
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16 |
During CYCLIC electron flow, electrons from ferrodoxin are transferred to
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Ferrodoxin NADP reductase |
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Photosystem II |
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Water |
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Cytochrome b6f |
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ATPase |
What the heck am I talking about when I say “Reduction of plastoquinone to plastoquinol occurs on the stroma side of the thylakoid membrane, and oxidation of plastoquinol back to plastoquinone occurs on the lumen side of the thylakoid membrane”? This describes:
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The proton motive force being used to convert ADP + Pi to ATP |
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Splitting water (H2O) into molecular oxygen (O2), 4 H+, and 4 e- |
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Using the proton motive force to move electrons across the membrane |
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Moving electrons down an energy gradient to move protons up a concentration gradient |
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Excitation of electrons in chlorophyll of photosystem I and II to initiate photochemistry |
The Calvin-Benson cycle takes place predominantly in the
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In the cytoplasm of mesophyll cells |
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In the stroma of chloroplast |
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In the lumen of chloroplasts |
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Across the plasma membrane of the mesophyll cells |
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Across the thylakoid membrane of chloroplasts |
Put the following in the correct order for linear photosynthesis (the Z-scheme)
CF-type ATPase
Plastoquinone/plastiquinol
Photosystem II
Photosystem I
Cytochrome b6f
Plastocyanin
In: Biology
In: Mechanical Engineering
Explain what Stanford Prison Experiment tells us about what drives human behavior.
In: Psychology
Explain the implications of comparative advantage. Specifically, think about what contributes to comparative advantage and what are potential outcomes. Find a current event, something that has taken place in the last year, that shows an example of economic comparative advantage. Please post with 200+ word response.
In: Economics
You have been asked by your supervisors at A&L Engineering to design a roller coaster for a new theme park. Because this design is in the initial stages, you have been asked to create a track for the ride. Your coaster should have at least two peaks and two valleys, and launch from an initial height of 75 meters. Each peak and valley should represent a vertical change of at least 20 meters. In your design, you should plan for a mass between 400 and 600 kilograms.
Once you have designed the track, you have been asked to calculate the kinetic energy, potential energy, momentum, and work done by the cart at various points throughout the track. Unless otherwise stated, you can ignore the effects of friction. Following your calculations, you have been asked to describe the energy transfers detailed by these equations.
Directions
To complete this roller coaster design report, complete the following:
In addition to your description of the motion of the cart on the track, you have been asked to model the motion of the cart as it comes to a stop at the end of the coaster. For these calculations, assume that the cart will inelastically collide with a cart of equal mass at rest on a flat surface.
Following the inelastic collision of the carts, the two carts fuse into an object with double the mass of the original cart. There is then a frictional section of the track to slow the cart to a stop over 20 meters. Describe the amount of work due to friction and frictional force exerted to stop both carts over 20 meters.
In: Physics
More than anything I need 5 - 7 of this homework. You have been asked by your supervisors at A&L Engineering to design a roller coaster for a new theme park. Because this design is in the initial stages, you have been asked to create a track for the ride. Your coaster should have at least two peaks and two valleys, and launch from an initial height of 75 meters. Each peak and valley should represent a vertical change of at least 20 meters. In your design, you should plan for a mass between 400 and 600 kilograms. Once you have designed the track, you have been asked to calculate the kinetic energy, potential energy, momentum, and work done by the cart at various points throughout the track. Unless otherwise stated, you can ignore the effects of friction. Following your calculations, you have been asked to describe the energy transfers detailed by these equations. Directions To complete this roller coaster design report, complete the following: Create a diagram of a roller coaster track containing at least two peaks and two valleys. As you complete your report, you may wish to design a more complicated coaster. However, it should still have two peaks and two valleys that meet the requirements below and that you are comfortable using in calculations and descriptions of energy and momentum. Your diagram should include the following information: An initial height of 75 meters At least two peaks and two valleys representing drops of over 20 meters A set mass for your roller coaster cart between 400 and 600 kilograms Calculate the kinetic energy, potential energy, and momentum of the cart at the initial drop for both peaks, and for both valleys. If your coaster has more than two peaks and two valleys, select which peaks and valleys you wish to use in your calculations and clearly mark them on your diagram. In your calculations, be sure to explicitly state the equations you use and what values you will be substituting to calculate the final value. Describe the energy transfers that occur as the cart moves along the track. This should be a narrative description of the energy transfers that occur at the initial launching point, peaks, and valleys. In your descriptions, address the following: At each of the identified points, how was kinetic energy transferred to potential energy, and vice versa? What happens to the total energy of the cart as it moves along the track? Why? How is the principle of conservation of energy applied in this situation? In addition to your description of the motion of the cart on the track, you have been asked to model the motion of the cart as it comes to a stop at the end of the coaster. For these calculations, assume that the cart will inelastically collide with a cart of equal mass at rest on a flat surface. Calculate the momentum and kinetic energy of the cart before and after an inelastic collision. In your calculations, be sure to explicitly state the equations you use and what values you will be substituting to calculate the final value. Describe the energy transfers that occur as a cart inelastically collides with an object of equal mass at rest. This should be a narrative description of the energy transfers that occur as the cart inelastically collides with a cart of equal mass. In your descriptions, address the following: What was the kinetic energy of each cart before and after the collision? What happens to the total energy of the system, now including both carts, as a result of the inelastic collision? Describe how the principle of conservation of energy is applied in this situation. Following the inelastic collision of the carts, the two carts fuse into an object with double the mass of the original cart. There is then a frictional section of the track to slow the cart to a stop over 20 meters. Describe the amount of work due to friction and frictional force exerted to stop both carts over 20 meters. Calculate the work due to friction and frictional force. In your calculations, be sure to explicitly state the equations you use and what values you will be substituting to calculate the final value. Describe the energy transfers that occur as the cart is brought to a stop. This should be a narrative description of the energy transfers—written to describe these concepts to a nontechnical audience—that occur as the cart is brought to a stop. In your descriptions, address the following: What is the kinetic energy of the cart system before and after it has been brought to a stop? What happens to the total energy of the system as a result of this change in motion? Describe how the principle of conservation of energy is applied in this situation.
In: Physics
In: Biology
Incubus Corporation began with an investment by shareholders of $36,000.
a. In its first year, its income showed a deficit of $6,600. What would the equity section of its balance sheet show at year end? (Negative answers should be indicated by a minus sign. Omit $ sign in your response.)
| Common stock | $ | |
| Retained earnings | ||
| Total Stockholders' Equity | $ | |
b. In the second year, it had income of $16,400 and a dividend of $5,600 was paid. What would the equity section of its balance sheet show at year end?
| Common stock | $ | |
| Retained earnings | ||
| Total Stockholders' Equity | $ | |
c. In the third year, Incubus sold more shares for a value of $18,000, earned income of $11,600, and paid a dividend of $5,600. What would the equity section of its balance sheet show at year end?
| Common stock | $ | |
| Retained earnings | ||
| Total Stockholders' Equity | $ | |
In: Finance