Plants Definition and 190 Threads

How do plants know when it is spring time or winter time?

http://www.google.co.uk/imgres?imgurl=http://3.bp.blogspot.com/-RkviH2SHn1Y/TZu_7pJG3LI/AAAAAAAABmo/qrIIU1OH3QY/s1600/Untitled-1.jpg&imgrefurl=http://sensorschematic.blogspot.com/2011/04/plants-watering-watcher-circuit.html&usg=__oKjLdywiML6qWH9jaTq-L1McZWk=&h=354&w=741&sz=114&hl=en&start=0&sig2=...

2 questions. 1. why vacuum is not used in hydro electric power plants and 2. why water under presure from big depths are not used for revolving turbines? 1. with vacuum you would need only small amount of water faling from a big altitude to revolve turbine. Turbine would revolve faster and...

http://www.latimes.com/news/local/la-me-uprates-20110418,0,7739985.story U.S. is increasing nuclear power through uprating Turning up the power is a little-publicized way of getting more electricity from existing nuclear plants. But scrutiny is likely to increase in the wake of Japan's...

Tell the world about the horrible site engineering the Fukushima crisis has exposed. The Low Tsunami protection in a major earthquake zone with a wall that was notdesigned to protect the plant in a worst case scenario. They have a recorded history of high tsunamis in the past yet they...

While i am studying i have been working part time at a market selling fruits and vegetables. I recently found out that the capsicum supplier actually plays music to his plants. I'm not sure if this is going to sound like a stupid question, but does this somehow affect their growth? Is there...

how do they sense light and lean or grow towards them? a creeper tries to grasp a solid object for support,after knowning through pressure or sense wht made it grow towards to send its branches towards it i mean what instructs their body to grow in that direction, is their any article...

I've heard that adding crushed aspirin to cut flowers improves the lifetime of flowers. Is this really true?

Hello all, Im no expert on the subject, but it has always seemed to me that for nuclear power to be safe, they should simply set up power plants far away from human populations. This seems very simplistic, so I am just curious to know what problems there are with this idea. Say for...

Does anyone have any reliable info on the nuclear plants - the reports on the news seem garbled to me. Edit by Borek: To All: Please stick to technical aspects and to things happening at the Fukushima Daiichi NPP. There are several other threads discussing different aspects of the...

I'm a grade 9 student working on s a space design contest. For my project I'm using leds to grow indoor plants. i read that the most efficient leds for growing plant is 660, 615 and 461 nm. does anybody know the luminous efficacy of efficient leds of these types. any suggestions would be helpful...

Hi, this question is posed merely out of curiosity: Background My thermodynamics textbook tells me that in regenerative power plants (i.e. ones making use of feedwater heaters), the steam extracted during expansion in order to feed the feedwater heater(s) results in less work being developed...

Some years ago i was walking along a beach in France and i found this fossil... Does somebody know the plant, the rock and the age of the fossil? or how can i found the plant that was fossiled or the age? THANKS!(sorry for my english) ABOVE YOU CAN SEE THE PICTURES CLEARLY...

I just wondered what these plants do with the salt they remove from seawater. Do they return it immediately, about where they took it from, or do they use it to infuse the fresh water that's returning to the oceans/seas with?

In power plants alternating emf is generated by rotating loop in magnetic field which is directly proportional to angular velocity of turbine.I think it is highly impossible to maintain angular velocity of turbine constant(especially in hydro power plants).Then how are they supplying a...

Hi Experts, -I want to List and rank the radiation concerns based on threat level in Nuclear plants - What are the radiation sources and locations of primary concern for workers in nuclear Plants? Please tell me if you know a good link for these questions Thanks in advance.

Power plants are among the first targets in a war, and a nuclear reactor blast by a weapon would release its radioactivity accumulated in normal use just as an accident like Chernobyl does. A country with many reactors transformed into dirty bombs would be uninhabitable. Unfortunately...

Hi All: My question is, why do some nuclear power plants have cooling towers and some don't? Why spend extra money on cooling towers if the feedwater can be cooled by the large body of water such as lake? Thanks!

Where can i find more information about new nuclear plant start-up procedures?

hi, does radiation have an effect on plants? thanks in advance, alf

How does whether plants are poisonous or nonpoisonous affect their dispersal of seeds?

Homework Statement A compressor takes in 4 kg/s of air at atmospheric pressure and temperature, 1 bar and 25 degrees C. Air leaves the compressor at 4 bars and 200 degreesC. Calculate the power input to the compressor and its isentropic efficiency. For air Cp=1.005 and Cv=0.718 kJ/kg K...

There is an interesting book out - I believe the title is "COOL IT" - which points that much "green energy " talk is nonsense. For example, the production of concrete necessitates the release of CO2. When you figure in the amount of CO2 generated for the manufacture of the concrete used in...

http://www.aolnews.com/article/obama-backs-nuclear-plants-with-billions-in-loans/19360343 While in principle I don't support the use of nuclear power, the pro-nuclear people here and the lack of available options have worn me down. I think we need to pursue other options with great diligence...

Plants require carbon dioxide to carry out photosynthesis. Can breathing on them encourage growth?

Hi, which nation plans to build the most nuclear plants 2010-2020? China? India? France? Does the US lead in nuclear plant technology and engineering? Will any new nuclear plants be built in the US within next several years?

I was reading my lab manual, and it says "All living organisms, including protists, bacteria, and plants, create ATP in fermentation or cellular respiration and then use ATP in metabolism." It doesn't go into any more detail than that, it just states it like it's a known fact and then moves...

Do plants absorb as much carbon-dioxide as they release? Is there a CO2 balance, deficit, or surplus in the plant world?

http://en.wikipedia.org/wiki/The_Secret_Life_of_Plants A very popular book back in the 1970s, have any papers been published that support the claims, and if so, have they been refuted? I remember trying to read it but I couldn't make it all the way through.

Could plants be bio-engineered so that a large fraction of their seed mass was in the form of muscle amino-acids? Do soybeans have a large fraction of their mass in the form of amino-acids that make up muscle protein? I would like such a plant so I could stop eating animal meat and reduce my...

In the American Southwest, it's tumbleweeds. Where I live, in the Southeast, it's http://www.jjanthony.com/kudzu/kudzoo/index.html.

Here is the information for the free response question. Please help me! Answers must be in essay form. Labeled diagrams may be used to supplement discussion, but in no case will a diagram alone suffice. It is important that you read the question before you begin to write. 1. This transparent...

I'm certain this is a silly question but: Do photosynthetic plants require natural sunlight to undergo photosynthesis, or will artificial light from flourescent lights suffice? Thanks!

I found the following note: Moderators I would like to know the opinions of experts from here before you move this thread to another forum. Is this all hyp? http://www.hyperionpowergeneration.com/ Home page of Hyperion power generation I have just read the thread Small nuclear power...

Entropy is said to always increase. But do not green plants reverse entropy? Seems to me that everything they do increases order, down to the molecular level.

I don’t get how a http://www1.eere.energy.gov/geothermal/powerplants.html#binarycycle" keeps the fluid flowing in one direction. My guess is it has something to do (1) with the condenser and (2) with a pump thrown in. The problem with a pump is that it must use up as much energy as the heat puts...

How long would it take to build a nuclear power plant, from drawing board to supplying power? But with these considerations: No red tape, no hearings, no bureaucracy, public outcry falls on deaf ears. The actual creation of the facility, building, outfitting, and starting up. The manpower...

Propose a mechanism to overcome the problems associated with lack of gravity for in space?

https://www.buyaquaglobes.com/?cid=496736

Consider a pine tree in a freezing climate. During winter temperatures outside average -10 Celcius. My question is how warm the inside of the pine tree is during this period. Clearly, this would vary from species to species, but in general, does the pine tree keep an internal temperature...

Come to know about any amazing plants(which do or have anything amazing) share it here!

This is an interesting statistic I read recently... apparently, in 500 million years the atmospheric CO2 will have been vastly depleted due to it reacting with silicon and being stored underground. The CO2 levels will then be too low to allow photosynthesis to occur. This statistic, presumably...

Yeah we’re running out of gasoline and diesel and, yeah, we’re converting more and more of our food into fuel, but the real problem is shortage of water. Turning corn into gasohol will raise corn prices which will make more farmers plant corn. There are lots of farmers and lots of land...

what is the difference between emergency diesel generators and station blackout disel generator? Is Station blackout disel generator just a redundant sysyetm for emergency disel generators?

"Aftermath: Population Zero" view of unattended nuke plants The National Geographic TV special called "Aftermath: Population Zero" explored the consequences if everyone on Earth vanished, particularly from the standpoint of suddenly unattended technical and industrial systems, and especially...

Regarding to physical size of national power systems, rate of power exchange and transmission lines capacity are increased by using of high voltage technology. Step up or generator transformers increase the produced voltage of power generators in great power plants. Therefore it seems the unique...

http://arxiv.org/ftp/arxiv/papers/0712/0712.3935.pdf Scroll to page 14 or so to miss the general talk, i am asking about the viability of the dome, i am not sure the structure would be as robust as the paper states.

Hi all, I was hoping someone more knowledgeable about aquariums and specifically aquarium plants could help me out here. I have a 10 gallon aquarium that has two incandescent bulbs in the hood. I went to the pet store to get a plant for it, and they tell me that I should get one of those (14W)...

Homework Statement I would like to have some of my homework problems checked. I looked in the book, and answered these the best I could. My answers are in bold. Thanks in advance for the help! Homework Equations N/A. The Attempt at a Solution 1. Which functional plant cells lack a...

A small plant is stripped off its leaves and is placed in a beaker containing water. The water surface is covered with oil to prevent evaporation of water. Will the plant absorb water within a couple of hours or so?