Plant Definition and 284 Threads

A freefall problem A flowerpot falls off a windowsill and falls past the window below. You may ignore air resistance. It takes the pot .420 s to pass this window, which is 1.90 m high. How far is the top of the window below the windowsill from which the flowerpot fell?

This is for all you System guys. What are the classifications for a valve to be considered an Active Component? Also, if the valve is classified as an Active Component does it automatically mean that the valve is a Safety Related Valve? I have several valves in my system (Check, Control...

hi all, i am looking to build an ultrasound producing device that emits at 50,000 cps? i need a list of materials and how to construct the circuit. research shows that you can multiply the growth of plants (radishes were tested) by 150% if subjected to ultrsound at around 50,000 cps. thank you...

<Crackpot link deleted> Anyone have details or an opinion rooted in science?

Hi, I'm doing 2nd year (sophomore year) in Mechanical Engineering. I'm going to do a summer internship on 'Power Plant Control and monitoring' (this subject was assigned to me)...but as you all know, I've got to do an Engineering Project (Final Year Project) later on...so I was wondering if...

Question: http://i1179.photobucket.com/albums/x393/mariaschiffer/img017.jpg Can anyone please check whether this answer is right.Thanks in advance Answer: Pressure of the closed feed water heaterP4=1MPa Take the extracted pressure from the second turbine P11=0.3MPa Operating pressure...

Question : http://i1179.photobucket.com/albums/x393/mariaschiffer/img017.jpg Can anyone please double check if this answer is right. Thanks in advance. Answer : Pressure of the closed feed water heaterP4=1MPa Take the extracted pressure from the second turbine P11=0.3MPa Operating...

After reading news of the Japan nuclear power plant, I have some questions: (1) If the fuel rod heats up on their own to the point of melting, how were they created to begin with, and how were they transported, or stored? (2) What is the source of the fuel rods? If the radioactive...

if the electrical energy stored in the leaf's battery pack came from a standard power plant and was delivered by a utility company ( like United Illuminated or Connecticut light and power) it was generated, transmitted, and transformed to the DC electricity that a battery can store at no more...

Iranian Foreign Minister Ali Akbar Salehi said that the Bushehr power plant is operational, Press TV reported on Wednesday. "As we have previously announced, Bushehr power plant has reached the criticality stage, meaning it has been successfully launched," Salehi reportedly said...

Hi! I've been looking to simulate a PI controller in SIMULINK without much success. You will be able to find a description of the above in the images located here: https://picasaweb.google.com/102197309611185157885/PIControlWithMatlabAndSIMULINK?authkey=Gv1sRgCOCnzvbm5PuNJA&feat=directlink. I...

Homework Statement What is the rate of emission (kg/h) of particulates from a power plant with a thermal output of 3000MW that burns coal with and ash content of 2%? How much is emitted if an electrostatic precipitator of 95% efficiency is used? if the ash contains 1ppM of mercury, how many...

Hi, I needed to know some things about reactivity and how it is changed by different factors while making a reactor critical? Control Rods, Booster Rods, Boron, Moderator Level, Xenon etc are affecting the reactivity of the reactor, but how to find out their contribution at certain point and...

How to calculate for any nuclear power plant 1. Thermal efficiency 2. power plant load factor 3. availability factor 4. capacity factor 5. core power density 6. specific power 7. linear power density 8. fissile loading 9. fuel enrichment 10. fuel burn-up 11. fuel residence time

Homework Statement For a gasification project being planned, 26000tons of coal per day will be used to produce 250000000 cubic ft per day of natural gas. if the coal is rated at 8700btu/lb and the gas at 950btu/cu ft. what will the efficiency will be? Homework Equations efficiency =...

My friend asked me what does a 540 MW power plant mean and how to interpret, I said it can lift a 1 Kilo Ton object to a height of 1 KM in about 3 Mins. My calculation is based on the equation of potential energy to the time taken by the power plant to produce that energy. Is this the...

I live and work approximately ten miles from the infamous Three Mile Island nuclear plant. As many of you probably know, this facility (and I assume others around the country) is periodically shut down for refueling. From what I understand, hundreds of temporary workers are brought into assist...

I am not a science guy, but I have been trying to find out how a nuclear plant works and I think I get it; however, I am not clear what it means to bombard something with neutrons. I think I understand how the process continues due to the chain reaaction, but how do you start the reaction.

There is so much conflicting information so I hope it's okay to post here and ask the experts(I'm assuming you're experts). I live 180 km south east of Tokyo and don't know how far I should trust the media and government. Two of my friends have decided to leave the area with their children and...

I had a lot more detail typed up but windows decided to eat it So here is my idea: (link to some epoxy resin deleted) crazy strong stuff, think of JBweld concentrate mixed with silica. Throw some steel fiber in the mix for good measure. Now if this stuff gets to hot it will...

Interesting finds. Continued... http://www.livescience.com/12883-plant-animal-mysterious-fossils-defy-classification.html

Problem : 20% of memory chips made in a certain plant are defective.Find the probability that in a lot of 100 randomly chosen for inspection i) atmost 15 are defective ii) excatly 15 are defective. Obtain these probability using normal approximation of binomial probabilities. Solution...

Hi all, I'm looking for information on the costs of downtime within nuclear plants. I have in mind that it's around 1million euros per day but I'd like to have a clear overview of the key factors that may influenced this number. I've been looking for a 'scientific' paper for hours (need...

Can you help me solution: The PWR plant of Figure 6-6 operates under the conditions given in Table 6-6. Assume that the turbine and pump have isentropic effciencies of 85%. 1. Draw the temperature-entropy (T-s) diagram for this cycle . 2. Compute the ratio ,of the...

In a tree undergoing secondary growth, many of the tissues will split or even be shed, due to the increase in girth of the stem. Which tissues will be affected in this way? It they are lost, how will replacements be made? Could anyone please help me with this question? Thank you.

This is not homework question, I'm just curious. Question: What is the purpose of a condenser in a steam power plant? I read that a condenser increases efficiency, but how? Since steam from the turbine exit ideally reduce only in temperature (but maintain the same entropy) why is there a...

I have a simple vapor power plant with a boiler, turbine, condenser and pump. I have the pressures leaving the boiler, entering the turbine, leaving the turbine and entering the condenser, leaving the condenser and entering the pump. I also have the temps for the above except I have the quality...

http://counterpunch.com/wasserman09142010.html Why Atomic Energy Can't Compete Is the Nuclear Renaissance Dead Yet? By HARVEY WASSERMAN Soaring costs at Vogtle, the US's one active new reactor project, have stuck Georgia ratepayers with $108 million in unplanned overcharges Currently...

Does anyone know what software is used to draw nuclear plant pipes, electrical systems, turbines, etc? Can Procad (3dsmart) be useful?

Power Plant - Will it Work? I updated my idea today! Please let me know what you think, good or bad, I don't get offended. Thanks for your input! It might be a little clunky but please see attachment. Thanks everyone for your thoughts, good or bad, doesn't matter!

Could someone please tell me how electric currents are conducted through the body. I understand that both Na and K ions are involved. Recentely I brought something called a "sensitive plant" (Mimosa Pudica) which folds up it's leaves when touched. I thought these same ions were...

Can someone explain to me how much pressure it would take to open the stomata of a plant cell?

Can someone please describe the different growth strategies that plants use in dark and light, and explain why these are important at different stages of growth in natural environments.

i was thinking about how desalination plants work, i haven't heard of one producing powered energy as like an electric company. I was thinking making one on a miniture scale, like in the Armed forces if a trooper doesn't have any iodine tablets he/ she could urinate in a hole then put a saram...

Homework Statement An electrical generating plant operates so that the steam driving its turbines is at 960 F, cooling towers keep the cold reservoir at a temperature of 96 F. If the plant's fuel cost for one year is 55.0 million dollars when using the cooling towers, estimate the yearly...

http://www.nj.com/business/index.ssf/2010/05/exelon_forced_to_clean_up_trit.html Not a good week for oil or nuclear power. This looks like it could be pretty serious.

Homework Statement The electric output of a power plant is 750 MW. Cooling water flows through the power plant at the rate 1.0*10^8 L/hr. The cooling water enters the plant at 16 degrees C and exits at 27 degrees C. What is the poer plant's thermal efficiency? Homework Equations W =...

Homework Statement (c13p30) A steam-electric power plant delivers 900 MW of electric power. The surplus heat is exhausted into a river with a flow of 6.29×10^5 kg/s, causing a change in temperature of 1.03 oC. What is the efficiency of the power plant (in % Don't enter a unit.)? Homework...

Urgent: Need Advice/Suggestions Is there is any type of acid, etc. that would be able to completely dissolve a vegetable plant upon contact, or within say a matter of minutes? A client of my landscaping company wants to have a large container filled with a substance that she can throw her...

First off, this is not a homework question. But I am not a scientist, so I understand very little about physics. I am an author and currently writing a short story in which the main character throws (not drops) a potted venus flytrap out of her third-floor apartment window and hits a guy in...

Hi I am told that steam generator is an area that is suseptible to aging effects and corrosion. I was wondering if anyone can elaborate on this a bit. Is it just due to the heat and humididty? I am studying BWRs and safety and maintanced aspects and I was thinking of focusing on this area...

Hello fellow PF-friends. I'm in the works of doing a compressed air survey where we wish to look at the savings potential for our plant. As there's a lack of control and overview we're going back to the basics (which means I have to start from scratch). I'm physically tracking the largest...

Hello, I'm new to this forum and I have a very important question about engineering design. I am currently working on my final project in my undergraduate study. The project that I am doing is about waste heat recovery design. My case study is a plant with a couple of ovens. The plan is to...

How are plantae protists similar and different from plant cells? The Attempt at a Solution similarity: both are photosynthetic, and producers, both are paraphylitic differences: protists are unicellular whereas plants are multicellular, plants are big and complex where as protists are...

All of us do know that plants evolved from green algae, but the algae is from fresh water or oceans?

If a 1 GW nuclear power plant runs continuously for 18 months, determine the mass of U 235 consumed by the plant, assuming an average fission energy yield of 202 MeV. Any help would be appreciated.

Hi professionals, I am a student from philippines and im about to design a steam power plant with 74000 KW load. Our professor gave us a 3 steps at first chapter the first is that we assume the pressures needed from P2 to P8 where P2 = 8 MPa assume T2 at centigrade, and get the enthalpies up to...

Homework Statement A small gas-fired power plant which operates between temperatures of 900 K and 300 K generates 30 MW of electrical power. Some of the waste heat from the generation process is used to heat water for space heating. The Carnot Efficiency for this plant is 66.7%...

Hello, Does anyone has a design of a type-small one stage biogas plant (CAD). Does anyone know how long will it take to get methane out from the fermentation plant? Please help. Thanks in advance.

Homework Statement Barium chloride is a toxic compound used in waste water treatment and many manufacturing processes. A 20 mL solution of 0.200 M Na2SO4 is added to a 10.0 mL water sample containing an unknown concentration of BaCl2 that was concentrated by 100 fold after being taken from a...