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March 16, 2010
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Homework Help: Art: Photography

Recent Homework Questions About Photography

Post a New Question | Current Questions

Biology Research Paper
'We are currently in an energy crisis. After food, fossil fuels are humanity's most important source of energy. These resources take millions of years to make. We are currently using the fuels that were made more than 300 million years ago, before the time of dinosaurs...
Tuesday, March 16, 2010 at 6:42pm

Environmental Science
Research Paper I need to write a research paper on coral reefs. i need to compose a research paper that deals with coral reefs and addresses enough of the questions below in order to meet the minimum page requirements for the paper (3-4 double spaced pages) Explain what a cora...
Monday, March 15, 2010 at 8:31pm

Trigonometry
a satellite camera takes a rectangular - shaped picture. the smallest region that can be photographed is a 4 - km by 6 - km rectangle. as the camera zooms out, the length l and width w of the rectangle increase at a rate of 3km/sec. how long does it take for the area A to be a...
Monday, March 15, 2010 at 5:33pm

Physics
GSM networks use microwaves of 20 cm in wavelength. The energy carried by one trillion (1012) photons of this wavelength is closest to ... a. 10^-16 Joules b. 10^-15 Joules c. 10^-14 Joules d. 10^-13 Joules e. 10^-12 Joules
Monday, March 15, 2010 at 12:35pm

physics
GSM networks use microwaves of 20 cm in wavelength. The energy carried by one trillion (1012) photons of this wavelength is closest to ... a. 10^-16 Joules b. 10^-15 Joules c. 10^-14 Joules d. 10^-13 Joules e. 10^-12 Joules
Monday, March 15, 2010 at 12:34pm

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!
Saturday, March 13, 2010 at 5:47pm

CHEM
Suppose that the microwave radiation has a wavelength of 10.8 cm. How many photons are required to heat 225 mL of coffee from 25.0*C to 62.0*C ? Assume that the coffee has the same density, 0.997 g/mL , and specific heat capacity, 4.184 J/(gK), as water over this temperature r...
Thursday, March 11, 2010 at 5:05pm

Works Cited
I copied a photo off a website, but it has no author. Should I mention the site only for my Works Cited page?
Wednesday, March 10, 2010 at 7:49pm

french
Part 2 directions: complete with either es, s, ées, 1. Voilà les photos que j'ai --------. (prendre) Answer: prises 2. C;est toi qui les as --------? (prendre) Answer: prises 3. Bien sûr! Je t'assure que je ne les ai pas ---------.(acheter) Answer: ...
Tuesday, March 9, 2010 at 5:54pm

French
Could you check these please Part 1 Directions: Complete with either e,es,ées, or s. J'ai pris ------- des photos. J'ai envoyé --------- les photos que j'ai pris --------- à mon amie Catherine. Je les ai envoyé --------- la semaine derni...
Tuesday, March 9, 2010 at 5:49pm

Chemisty
In which cases are higher-energy photons released, with Li+ or Cu2+? How do you know?
Tuesday, March 9, 2010 at 2:57pm

environmental science
what is a example of mutualistic symbiosis between the organisms of fungus and a photosynthetic alga?
Monday, March 8, 2010 at 10:46pm

English
I forgot to include the following questions for you to check. Thank you very much. 7) The interviewee got together with two friends of him and they dressed up like a seventies pop group in Afro wigs and dark glasses. 8) His girlfriend had also arranged for a musician to come a...
Monday, March 8, 2010 at 3:20pm

Physics
At a spot in the ocean, the surface irradiance is 7.8*10^16 photons and k=.14 m^-1. At what depth does the euphotic zone end?
Friday, March 5, 2010 at 9:18am

Physics
On a bright sunny day the irradiance on the surface of the ocean is 1.6*10^17 photons cm^-2 s^-1. If k=0.02 m^-1 a) How much light is left (irradiance) at 15 m? b)at 75m?
Friday, March 5, 2010 at 9:17am

Oceanography
On a sunny day in an estuary, the surface irradiance is 1.6*10^17 photons cm^-2 s^-1. What is k if the irradiance is 7.3*10^13 photons cm^-1 s^-1 at 16 m depth? At a spot in the ocean, the surface irradiance is 7.8*10^16 photons and k=.14 m^-1. At what depth does the euphotic ...
Friday, March 5, 2010 at 6:06am

English
I forgot to include the following sentences. Thank you very much for your invaluable help. 1) I went to church for (the) Christmas Mass. 2) How many hours (or just: how long is possible) did it take you to get there? 3) How many days (or just: how long) did your holidays last?...
Wednesday, March 3, 2010 at 4:39pm

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 effect of such...
Monday, March 1, 2010 at 4:59pm

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 effect of such...
Monday, March 1, 2010 at 4:52pm

physics
the first excited state of the nucleus of uranium-235 is 0.051 MeV above the ground state. what is the wavelength of the photon emitted when the nucleus makes a transition to the ground state? (in meters)
Saturday, February 27, 2010 at 6:36pm

physics
the first excited state of the nucleus of uranium-235 is 0.051 MeV above the ground state. what is the wavelength of the photon emitted when the nucleus makes a transition to the ground state? (in meters)
Saturday, February 27, 2010 at 4:18pm

instruction(am i right track)
Plan a presentation for parents to explain the purpose of performance assessment, the use of rubrics, and portfolio assessment. Phases of the Evaluation Process Although the evaluation process is not necessarily sequential, it can by seen as a cyclical process including four p...
Friday, February 26, 2010 at 9:28pm

science
How does oxygen production relate to the rate of photosynthesis?
Wednesday, February 24, 2010 at 6:49pm

Environmental Science
#54. In two or three well-developed paragraphs, define and list two characteristics of each of the following: coastal wetlands, coral reefs, and oceans. I'm not sure what it means by defining and listing two characteristics. here's my answer: Coastal wetlands are coast...
Wednesday, February 24, 2010 at 5:07pm

writing
Hello. I could really use some help with my ESSAY. If anyone could tell me what they think of it and if anything needs corrected. Thanks Jess Well I guess the best place to start is the beginning. I was born in Kentucky, but only lived there for five years. Then moved to Flori...
Wednesday, February 24, 2010 at 10:35am

grammar
Hello. I could really use some help with my ESSAY. If anyone could tell me what they think of it and if anything needs corrected. Thanks Jess Well I guess the best place to start is the beginning. I was born in Kentucky, but only lived there for five years. Then moved to Flori...
Tuesday, February 23, 2010 at 11:03pm

English
Can you please tell me if the following words are still used in English and if not, what shall I use instead? Baker's, butcher's, chemist's, newsagent's, tabacconist's, optician's, fishmonger's, shoe shop, shoe repairer, bookshop, jewellery shop, da...
Tuesday, February 23, 2010 at 7:04pm

Environmental Science
#35. In two or three well-developed paragraphs, list the populations that are affected by ultriviolet light and identify the effects on each of these populations. my answer: There are four major populations that are affected by ultraviolet light. These include humans, amphibia...
Tuesday, February 23, 2010 at 5:24pm

Biology
Need help with these: 33. In addition to causing disease, protests also affect humans through a. their role in the nitrogen cycle b. their antibiotic properties c. their ability to clean up oil spills d. all of the above A? 35. Fungi obtain food by a. photosynthesis b. the nit...
Sunday, February 21, 2010 at 1:04pm

Physics
Ammeter 1 reads 0.20 A. a. What should ammeter 3 indicate? b. What should ammeter 4 indicate? Given: RA = 22-OHM RB = 13-OHM A1 = 0.20 A Ammeter 2 reads 0.15A. a. Find the voltage across the 22-ohm resistor? b. Find the voltage across the 15-ohm resistor? c. What is the batter...
Sunday, February 14, 2010 at 8:30am

Biology
What molecules cycle between the light and light independent phase of photosynthethis?
Wednesday, February 10, 2010 at 7:02pm

Biology
what molecules cycle between the light dependent and light independent stages of photosynthethis
Wednesday, February 10, 2010 at 6:59pm

chemistry
1. Which of the following statements about the cell theory is correct? a) All living organisms are made up of one or more cells. b) All cells arise from other, pre-existing cells c) All eukaryotic cells contain symbiotic prokaryotes. d) All prokaryotic cells contain symbiotic ...
Wednesday, February 10, 2010 at 10:23am

Science
For this question : How does the photoperiod differ between the two solstices? wouldn't the solstices be spring and fall?
Monday, February 8, 2010 at 8:40pm

Science
What is unique about the photoperiod at the two equinoxes? At the two equinoxes, the photoperiod is equal, it stays the same for both dates?????????? Please help me with this one, I don't think I have it right.
Monday, February 8, 2010 at 7:07pm

Science
How does the photoperiod differ between the two solstices? The Photoperiod becomes longer in summer and it becomes shorter in winter. Please tell me if this is correct, and any other infomation would be appreciated, thanks
Monday, February 8, 2010 at 6:56pm

Science
What is the photoperiod? I wrote: The photoperiod is the length of day. Please tell me if this is correct, thanks
Monday, February 8, 2010 at 6:52pm

electrical and electronic engineering
investigate the impact of photovoltaic system on low voltage distribution network in Malaysia.
Thursday, February 4, 2010 at 9:44am

English-Ms. Sue
here is the essay: Get Thee to a Punnery I dream of being asked to a dinner party where the hostess falls backward into the table. "Look out"!, I shout, 'you'll burn your end at both candles." Or I meet a sculptor in the street. "Hi, you old chisele...
Monday, February 1, 2010 at 8:50pm

English-Ms. Sue
I'd like to know how you find those puns good. I am unable to understand the difference between good and bad puns, even after looking at the site you provided. I dream of being asked to a dinner party where the hostess falls backward into the table. "Look out"!, ...
Monday, February 1, 2010 at 7:56pm

English
What are some good and bad puns? These ones in my opinion are bad: *She criticized my apartment, so I knocked her flat. *I have actually asked photographers to step into the darkroom with me so we could see what develops *Someday I hope I'll be asked to introduce an archeo...
Monday, February 1, 2010 at 6:49pm

algebra
3 1/2 in. by 5 in. photograph is enlarged to a 28 in. by 40 in. poster. What is the scale of the poster?
Monday, February 1, 2010 at 6:26pm

PHYSICS
PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined on an electronic scale...
Sunday, January 31, 2010 at 11:28am

PHYSICS - ONE MORE QUICK QUESTION
PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined on an electronic scale...
Sunday, January 31, 2010 at 9:53am

art
thanks bob but with out words i am more lost than before. what are the photos showing me?
Saturday, January 30, 2010 at 8:53pm

physics - BOB
PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined on an electronic scale...
Saturday, January 30, 2010 at 5:42pm

physics - Damon
PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined on an electronic scale...
Saturday, January 30, 2010 at 5:34pm

physics - Damon
PLEASE SEE ADDITIONAL QUESTION AT BOTTOM. A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined on an electronic scale...
Saturday, January 30, 2010 at 4:43pm

PHYSICS
A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined on an electronic scale and its diamter was measured using calipe...
Saturday, January 30, 2010 at 4:00pm

biology
What is the benefit of working with an enlarged photograph of the chromosomes instead of the chromosomes themselves?
Friday, January 29, 2010 at 9:34pm

English 101
Do these two sentences contain misplace and dangling modifiers are there correct. 1.Louise projected the photographs on a large screen that she had taken at the zoo. 2. There is a bracelet at the musuem that is four thousand years old.
Friday, January 29, 2010 at 1:49am

Earth science
Please go over my answers and tell me what I got wrong... Telling me the correct answer would also be nice please hurry I only have 20 mins What does the principle of uniformitarianism tell us about the past? (Points: 5) The past is the key to the future. X The present is the...
Friday, January 29, 2010 at 1:43am

english
27. Choose the label that best describes the verb in the sentence. We have been preparing for the track meet all month. (Points: 5) present perfect progressive past perfect progressive present perfect present progressive 28. Which of the following sentences contains a shift in...
Tuesday, January 26, 2010 at 2:16pm

math
a photo 5 inches wide and 7 inches long is enlarged. The sides of the new photo are in proportion to the original. The new photo is 14 inches wide. how do i find the length
Monday, January 25, 2010 at 10:32pm

Biology
Need help with these two: PLEASE help me; this is like the 4th time I'm posting this. 26. Why do plant cells contain both choroplasts and mitochondria? a. in the light, plants are photosynthetic autotrophs. In the dark, they are heterotrophs. b. if plants can't produce...
Monday, January 25, 2010 at 3:24pm

Biology
Need help with these two: 26. Why do plant cells contain both choroplasts and mitochondria? a. in the light, plants are photosynthetic autotrophs. In the dark, they are heterotrophs. b. if plants can't produce enough ATP to make sugars during photosynthesis, they can produ...
Sunday, January 24, 2010 at 3:43pm

Biology
Need help with these two: 26. Why do plant cells contain both choroplasts and mitochondria? a. in the light, plants are photosynthetic autotrophs. In the dark, they are heterotrophs. b. if plants can't produce enough ATP to make sugars during photosynthesis, they can produ...
Saturday, January 23, 2010 at 6:14pm

Biology
Need help with these two: 26. Why do plant cells contain both choroplasts and mitochondria? a. in the light, plants are photosynthetic autotrophs. In the dark, they are heterotrophs. b. if plants can't produce enough ATP to make sugars during photosynthesis, they can produ...
Friday, January 22, 2010 at 6:37pm

biology
how can the absence of starch in the elaborated sap be explained knowing that it is produced by photosynthesis?
Monday, January 18, 2010 at 12:59pm

chemistry
The ____electron___ makes a transition from a __high___ energy orbital to a ______low__ energy orbital resulting in the________ of a photon. Can you guys help me fill in the blanks plz >.<
Monday, January 18, 2010 at 2:11am

Gen Chem
Light of wavelength 272 nm shines on a piece of magnesium metal. What is the speed of the ejected electron? (Light energy greater than that of the work function of magnesium ends up as kinetic energy of the ejected electron. The work function is the minimum energy needed to ej...
Monday, January 18, 2010 at 2:08am

Chemistry
The ____electron___ makes a transition from a __high___ energy orbital to a ______low__ energy orbital resulting in the________ of a photon. I am having trouble with the last one.... tried production and formation doesn't work need help!!!!
Monday, January 18, 2010 at 1:06am

Environmental science
34. Using two or three well-developed paragraphs, describe how energy is transferred from the sun to producers and on to consumers. Provide at least one example. -The process of photosynthesis is when energy from the sun enters an ecosystem when a plant uses sunlight to make s...
Tuesday, January 12, 2010 at 4:37pm

Environmental science
33. Using two or three well-developed paragraphs, write the names of the six kingdoms of organisms. Identify several characteristics of each kingdom. -Most organisms are classified into six kingdoms, which are: Archaebacteria, Eubacteria, Fungi, Protists, Plants, and Animals. ...
Tuesday, January 12, 2010 at 4:29pm

chemistry
the frequency in hz of radiation having energy of 4.18 x 10^-21 j/photon?
Sunday, January 10, 2010 at 11:32pm

Environmental science
here is another question that i couldn't decide an answer to: 2. Bacteria and fungi are important in the environment because a. some convert nitrogen to a form used by plants b. some return nutrients from the remains of organisms to the soil c. some break down the remains ...
Wednesday, January 6, 2010 at 12:40pm

Geography
I have to choose a european landscape and, with the support of a photograph/picture, comment on it and mention the different aspects of the landscape and its characterisctics of Europe as well as how the space is used by the people. I am not sure what to pick. What would be go...
Tuesday, January 5, 2010 at 6:25pm

chemistry
why do you need to construct a calibration curve when doing spectrophotometric determinations? Is it not possible to obtain the concentration of the unknown solution by simply getting the extinction coefficient of the species under study and then determine its concentration in...
Tuesday, January 5, 2010 at 5:59am

French
Could you please check and correct this for any spelling or grammar problems. Thanks! PAST 1.Quand j'étais jeune, j'ai eu des cheveux blonds. 2.Ma soeur, Marissa, et moi avons joué ensemble tout le temps. 3.J'ai sucé mon pouce. 4.J'ai port&...
Monday, December 21, 2009 at 6:24pm

Electronics
HElp me find Vo using Thevenin's Theorem... heres the diagram: flickr . com / photos / huck4477/ 4193362834
Thursday, December 17, 2009 at 1:30pm

Math
A photo width is 2 in. more than it's length. A borderof 1 in is placed around the photo, and the area covered by the photo and it's border is 120 sq. inches. Find the dimensions of the photo itself.
Monday, December 14, 2009 at 8:09pm

Math
My teacher asked us to take five photographs and then in each find four mathematical concepts. She wants us to go beyond the basics by not focusing on only shapes. Do you have any suggestions?
Saturday, December 12, 2009 at 1:11pm

physics
In a double slit experiment with a single electron, a very thin film of fluorescent material that emits a photon whenever an electron passes through is placed on one of the slits to check which slit the electrons goes through. Describe the resulting pattern on the detecting sc...
Thursday, December 10, 2009 at 9:21am

physics
In a double slit experiment with a single electron, a very thin film of fluorescent material that emits a photon whenever an electron goes through. Describe the resulting pattern on the detecting screen if the experiment is repeated many times.
Thursday, December 10, 2009 at 1:04am

Physics
A cathode ray tube operates at 80 kV with a current of 875 uA. Calculate the a)Intesity (# of photons per second f the x-rays b)Minimum wavelength of the x-rays produced by the CRT thanks in advance
Monday, December 7, 2009 at 10:51pm

*updated Chem
I am wondering if my work makes sense for the following problem: Warm objects emit electromagnetic radiation in the infra-red region. Heat lamps employ this principle to generate infra-red radiation. Water absorbs infra-red radiation with wavelengths near 2.80um. Suppose this ...
Sunday, December 6, 2009 at 7:51pm

Chemistry
I am wondering if my work makes sense for the following problem: Warm objects emit electromagnetic radiation in the infra-red region. Heat lamps employ this principle to generate infra-red radiation. Water absorbs infra-red radiation with wavelengths near 2.80um. Suppose this ...
Sunday, December 6, 2009 at 7:19pm

college Chemistry
Warm objects emit electromagnetic radiation in the infra-red region. Heat lamps employ this principle to generate infra-red radiation. Water absorbs infra-red radiation with wavelengths near 2.80um. Suppose this radiation is absorbed by the water and converted to heat. A 1.00 ...
Sunday, December 6, 2009 at 11:51am

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?
Saturday, December 5, 2009 at 2:33pm

art
i need a photo of an animal, I can't think of any animal, please send some pictures!
Wednesday, December 2, 2009 at 7:43pm

biology
what substance enters the food chain through photosynthessis
Wednesday, December 2, 2009 at 4:54pm

French
Could you please check this also thanks Directions: L'Alsace, vous connaissez? Complete with the correct form of connaître or savoir. Karen et Melissa vont en France. Elles vont visiter l'Alsace. Elles ------------------(connaissent) assez bien Paris, mais elles ...
Wednesday, December 2, 2009 at 4:24pm

chemistry
How fast must a 56.5 g tennis ball travel in order to have a de-Broglie wavelength that is equal to that of a photon of green light (5400 Angstroms)?
Wednesday, December 2, 2009 at 12:19pm

chemistry
A radio wave has a frequency of 3.6 * 10 10 Hz. What is the energy of one photon of this radiation? thank you.
Wednesday, December 2, 2009 at 12:18pm

Biology
I had a Bio lab about gel electrophoresis and PCR. for each lab, we have to make up thoughtful, detailed questions. You don't have to answer the questions so please don't go through the trouble by answering them. The first question is about something we did in lab. My ...
Tuesday, December 1, 2009 at 10:05pm

science
A component synthesized by photosynthetic producerrs on which all aerobic consumers depend is what
Monday, November 30, 2009 at 10:27pm

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 is P a maximum?
Monday, November 30, 2009 at 6:12pm

7th grade
Site #3: What in the World - Mystery Photos (from National Geographic) Try at least four different challenges in the “What in the World” category and record your results in the chart. You will need to fill in the chart with the title of the game and the name of the f...
Monday, November 30, 2009 at 5:54pm

art
hi do you have any ideas for the following project: i need to pick any environment and document a message or issue about it in that exact environment, e.g. take a photo of my work in that place. i'm thinking about focusing on the issues of energy wastage but don't know...
Saturday, November 28, 2009 at 12:06pm

English
You've been put in charge of planning a one-day departmental training seminar with Dr. Melanie Dobler as your speaker. You must make travel arragements for the speaker, reserve a company room large enough for the number of people attending, and requisition any necessary it...
Saturday, November 28, 2009 at 9:54am

english II
error in separation of sentence parts. tha answer is b. A.Dungaree, an Indian word that is rarely used these days, refers to a type of cloth rather than to a specific article of clothing. B.Her voice was, as even her harshest critics were forced to concede, as smooth as liquid...
Tuesday, November 24, 2009 at 6:07pm

english II
Sentence contains an error in Pronouns. I think B is wrong. A.Will everyone who is an uncle please raise his hand? B.The president and the general addressed the troops before it sat down to enjoy Thanksgiving dinner. C.At a golden wedding anniversary, a family is likely to vie...
Tuesday, November 24, 2009 at 4:51pm

English
Look at the pictures. Look at Einstein first. He is a physicist. Let's go counterclockwise. The next person is Namjoon Baek. He is the person on the top of the page. Look at the next person. Go counterclockwise, and you can see a person. He is Winston Churchill. The next p...
Tuesday, November 24, 2009 at 7:04am

Biology
Both photosynthesis and aerobic cellular respiration are examples of complex metabolic pathways, consisting of many linked chemical reactions that require enzymes to function. Briefly, explain two (ONLY TWO) attributes of enzymes in catalyzing chemical reactions and in metabol...
Sunday, November 22, 2009 at 8:00pm

photo
I need to represent an non physical enemy ( I can't just take a picture of somebody I don't like ) but I don't have any ideas on what to do, can anybody help me?
Friday, November 20, 2009 at 2:09pm

geography
for my assignment i need to write a report about the 1999 turkish earthquake. i need to include photos maps facts graphs and eye witness accounts. if anyone knows any good websites i will be truely grateful. i got my assignment today and have only got intil monday to complete ...
Friday, November 20, 2009 at 1:18pm

Bio
A biologist was experimenting with a corn plant that had previously incorporated radioactive carbon into starch stored in its cells. She measured the radioactivity present in the following compounds: Sugar extracted from the plant CO2 producd by the plant Alcohol, if produced ...
Thursday, November 19, 2009 at 6:04pm

Physics-Astronomy
Hello, I have no idea how to do the following question. Any help would be appreciated: An energy of at least 13.6 electron-volts is required to ionise a hydrogen atom. What is the longest wavelength of electromagnetic wave capable of ionising hydrogen? And which regions of the...
Monday, November 16, 2009 at 10:51am

Chemistry
In an atom, an electron in which of these sublevels can absorb a photon of energy but cannot emit one? a. 3s b. 2s c. 3p d. 1s e. 3f Would it be 1s? I don't really understand, if someone could explain this to me I'd appreciate it
Saturday, November 14, 2009 at 10:29pm

chemistry
How many photons will be required to raise the temperature of 2.0 g of water by 2.5 K?
Friday, November 13, 2009 at 9:56am

college chemistry
A green leaf has a surface area of 2.40 cm^2. If solar radiation is 1120 W/m^2, how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 nm for solar radiation.
Thursday, November 12, 2009 at 6:31pm

biology
can someone explain photosynthesis
Wednesday, November 11, 2009 at 6:45pm

chemistry
An argon ion laser puts 5 W of continuous power at a wavelength of 532 nm. the diameter of the laser beam is 5.5 nm. if the laser is pointed at an object, how many photons of laser will strike the object per second.|(1W=1Js-1).
Wednesday, November 11, 2009 at 1:12pm

Chemistry
Water is exposed to infrared radiation of wavelength 3.0×10^−4 cm. Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 1.7 g of water by 2.2 K?
Monday, November 9, 2009 at 3:16pm

Photon Energy
How much energy is contained in 1 mol of each of the following? X-ray photons with a wavelength of 0.175 nm. Gamma-ray photons with a wavelength of 2.48×10^−5 nm.
Monday, November 9, 2009 at 2:17pm

11th grade
I want to send path help an actual photo I took that's attached onto the e-mail. I can't do that on that website. Is there another website where I can e-mail a teacher a photo?
Sunday, November 8, 2009 at 5:23pm

Vista Laptop Help
Okay so I'd do this myself but I only have a desktop with Windows Vista and not a laptop so if anyone with a laptop that has Vista on it could please help me: 1. Open Windows Mobility Center and then mute the speakers. 2. Change the plan settings for the Balanced plan so t...
Sunday, November 8, 2009 at 1:01am

science
what is the wavelength of radiation with a frequency of 1.50 times 10^13s-1? Does this radiationhave a longer or shorter wavelength than red light? also... What is the energy of a photon of microwave radiation with a frequency of 3.20 times 10^11 s-1?
Tuesday, November 3, 2009 at 10:17pm

biology
examine the intetnet structure of the leaf drawn say how the different layer are suiled for the function of photosynthes
Tuesday, November 3, 2009 at 5:48pm

ap bio
Hornworts differ from mosses and liverworts in containing: a. small leaves b. photosynthetic sporophytes c. gametphytes d. sporophytes e. spores Well, First I thought ok its small leaves and that was wrong. Next I thought it would be spores and that was wrong. My next guess wo...
Monday, November 2, 2009 at 9:26pm

math
a museum curator has 203 wildlife photographs. she wants to display them in groups of 8. how many groups of 8 can she make? the answer is 25 r3 but i want to know if i drop the remainder,tell whats left over or increase the quotient by one.
Monday, November 2, 2009 at 5:07pm

10th grade English
This is my short story essay. I've put some conversations now and then so please take that into account. I would really appreciate if you could fix any mistakes, awkward phrases or even how to make this essay a better writing. Thank You ¡®Honk! Honk! Move out of ...
Thursday, October 29, 2009 at 5:18am

SCIENCE
WHICH PROCESS PRODUCES MOST OXYGEN IN ATMOSPHERE PHOTOSYNTHESISI OR TRANSPIRATION WHICH GAS DOES PHOTOSYNTHESISI PRODUCE OXYGEN OR CARBON DIOXIDE GRAS--GRASSHOPPER-SNAKE-HAWK IF APART OF A FOOD WEB WOULD MORE MORE ARROWS POINT TOWARD OR AWAY FOR THE SECOND LEVEL CONSUMER WHY
Wednesday, October 28, 2009 at 6:52am

Chemistry
Ionization energy is defined as the minimum energy required to remove an electron from the ground state (n0) to infinity (n∞). Determine the wavelength of radiation required to ionize the hydrogen electron from the n = 2 energy level. Calculate the energy (Joules) associ...
Monday, October 26, 2009 at 4:01pm

Japanese
How do I write the following four sentences in romaji: 1. Is this book yours? 2. Your money is over there. 3. There is your pencil. 4. Here is your photo.
Friday, October 23, 2009 at 8:36pm

english
The photo me, shows an intelligent girl whose life might seem perfect. I have a smile on my face and I seem extremely happy, but when you look deeper into my eyes you see sadness and struggle. Struggle to be something my parents want me to be; the smile isn’t real the dim...
Thursday, October 22, 2009 at 5:08pm

science
Assignment says label the parts of a plant cell. I'm blind so I'm going to write the names and put their functions. Cell wall, strenghthens the cell. vacuole is where the cell sap is produced. cell membrane is on outside on the cell. It controls what goes in and out of...
Wednesday, October 21, 2009 at 5:12am

science
crossword puzzle about photosynthesis. this part of the plant is where the reproductive organs can be found (6 letters) flower? these parts of the flower were once the bud(6 letters) petals or sepals? which is right:) thankyou
Sunday, October 18, 2009 at 10:17am

operating system
Can someone tell me how I would make a process tree with the following data: F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 4 S 0 1 0 0 80 0 - 764 select ? 00:00:01 init 5 S 0 2 0 0 75 -5 - 0 kthrea ? 00:00:00 kthreadd 1 S 0 3 2 0 -40 - - 0 migrat ? 00:00:00 migration/0 ...
Saturday, October 17, 2009 at 10:27am

math133
a photograph measures 9 in by 12 in. earl put it in a frame that addded 2in to everyside. find the ouside perimeter and total of the photograph and frame.
Thursday, October 15, 2009 at 9:39pm

english
Which of the following usually gets a source note on the same page it appears? a. Quote b. Photo c. Paraphrased Passage d. Statistics please help me it urgent!! thank you!
Monday, October 12, 2009 at 2:54pm

Biology
1. A famous scientist once said that wherever in the universe life exists, some of those life-forms must be colored. Why would the scientist make such a statement? 2. One of the accessory pigments used in photosynthesis is beta-carotene, a carotenoid found in high concentratio...
Monday, October 12, 2009 at 12:39pm

biology
why do plants produce far more sugar than they need? why do they not stop photosynthesis once immedaite needs are met?
Sunday, October 11, 2009 at 7:48pm

curriculum content
Which is the oldest art? A. Drama/theater B. Photography C. Dance D. Music
Saturday, October 10, 2009 at 8:32pm

english
Ranging from the use of pictures at the beginning og wtiting, to the birth of the photonic alphabet.
Friday, October 9, 2009 at 1:59pm

Physics
A hare and a tortoise compete in a race over a course 1.20 km long. The tortoise crawls straight and steadily at its maximum speed of 0.540 m/s toward the finish line. The hare runs at its maximum speed of 9.00 m/s toward the goal for 0.800 km and then stops to taunt the torto...
Friday, October 9, 2009 at 1:32am

space
does taking a photo from outer space help earth spherical shape?
Wednesday, October 7, 2009 at 6:19pm

Biology
CAM (crassulacean acid metabolism) plants such as the cacti differ from standard C4 plants such as corn in which of the following ways? a. CAM plants minimize photorespiration whereas C4 plants do not. b. CAM plants use both mesophyll and bundle sheath leaf cells for photosynt...
Tuesday, October 6, 2009 at 11:53pm

science
please could someone help me with these question please i have loked on websites but i am still stuck. true or false and i need to write a comment why:- plants photosynthesise 24 hours a day respiration uses up carbon dioxide thanks guys!
Tuesday, October 6, 2009 at 12:06pm

science
i need to answer these statements true or false:- ive answered some but stuck on others. 1)only animals respire - false 2)respiration uses oxygen 3)respiration uses up carbon dioxide 4)only green plants photosynthesise-true 5)all living things respire- true 6)plants use up and...
Tuesday, October 6, 2009 at 10:12am

Bio
why is energy absorbed twice in the light reactions in photosynthesis
Wednesday, September 30, 2009 at 9:32pm

Business English Memo
Scenario: You've been put in charge of planning a one day departmental training seminar with Dr. Melanie Dobler as the speaker. You must make travel arrangements for the speaker, reserve a company room large enough for the number of people attending, and requisiton any nec...
Monday, September 28, 2009 at 1:34pm

Communication Law Studies
Can publishing photos of people who are unaware that they are being taken can hold legal binding in court? If so how and under what statutes?
Monday, September 21, 2009 at 10:20pm

Communication Law Studies
Can publishing photos of people who are unaware that they are being taken can hold legal binding in court? If so how and under what statutes?
Monday, September 21, 2009 at 8:37pm

11th grade Biology
I have three questions that I can't find anywhere. 19) Organisms that are at the greatest risk when the dynamic equilibrium is upset would be the: A. Organisms at the top of the evolutionary tree B. Generalists C. Specialists D. Invertebrates E. All of the above 20) A majo...
Friday, September 18, 2009 at 3:30pm

Reading
If you had these to choose from Table of Contents Headings and Subheadings Glossary Index Captions for Photographs then where would you look to locate information on ancient Rome? And Where would look to find the date of the beginning of World War 1?
Thursday, September 17, 2009 at 5:42pm

11th grade Biology
Match the following.. 12. Moves in cycles from nonliving things to living things back to nonliving, etc. 13. Can be passed from one organism to another in a food chain. 14. Is constantly being lost from the biosphere. 15. Can be created by living organisms. 16. Involved in the...
Wednesday, September 16, 2009 at 1:35pm

Repost- Biology
Will someone please help me out.. I have been posted these questions for 7 hours .. but no one has helped me out..please help me out..I got to figure it out within today..please.. 1. Which of the following is a biotic factor that might affect the life of a water-dwelling organ...
Sunday, September 13, 2009 at 9:27pm

Biology
1. Which of the following is a biotic factor that might affect the life of a water-dwelling organism? A. Temperature of the water B. Speed of water current C. Pollutions in water D. Bacterial population in water My guess: D? 2. Which of the following things does NOT allow plan...
Sunday, September 13, 2009 at 2:56pm

Biology
1. Are the third-order heterotrophs consumed by gungal decomposers? My guess:Yes? 2. Which of the following fixes atmospheric N2 (nitrogen gas)? A. photosynthesis B. symbiotic bacterianon the roots of legumes C. uv light D. decay organisms E. autotrophs My guess: B? 3. Which e...
Sunday, September 13, 2009 at 2:44pm

French
I need to translate this paragraph. Can someone check my work? I didn't write it so I can't just change it to have only words I know so I need help to translate it. Thanks! I would like to travel if I had the time and the money. I would like to see the mountans of tibe...
Sunday, September 13, 2009 at 12:44am

AP Bio
This is the summary formula for photosynthesis: 6CO2+6H20 yields C6H12O6+6O2 Refer to the summary formula for photosynthesis. If you know the number of molecules or moles of any of the reactants used (or products produced), how would you calculate the number of molecules or mo...
Saturday, September 12, 2009 at 1:40pm

biology
4. Both photosynthesis and aerobic cellular respiration are examples of complex metabolic pathways, consisting of many linked chemical reactions that require enzymes to function. Briefly, explain two attributes of enzymes in catalyzing chemical reactions and in metabolic pathways
Saturday, September 12, 2009 at 12:54am

Math
Asha plans to place vacation photos of her friends on a square bulletin board measuring 72 units by 72 units. a) Which size of phot can be placed without any spaces or overlapping? 10 X 8 6 X 4 5 x 7
Wednesday, September 9, 2009 at 4:14pm

science
Please explain photosynthesis.
Monday, September 7, 2009 at 9:49am

science
photosynthesis and aerobic cellular respiration
Sunday, September 6, 2009 at 4:48pm

biology
How did the primordial atmosphere, photosynthesis, oxygen, the ozone layer, and the endosymbiotic theory influence the origin of living organisms?
Wednesday, September 2, 2009 at 1:40am

Physics
1. What is the weight of a 24kg mass on Mars if its surface gravitaional field = 3.5N/KG? a) 235.2 N b) 84 N c) 24 kg d) 6.86 kg 2. A space shuttle is placed in a circular orbit around the Earth. It then thrusts its engine and moves to a new orbit, as shown below. Which statem...
Monday, August 31, 2009 at 6:02am

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 two tests Hertz car...
Monday, August 31, 2009 at 6:01am

GIS
What is the term for measuring spot heights using stereographic pairs of survey-quality aerial photographs?
Saturday, August 29, 2009 at 8:50am

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