Solar Definition and 1000 Threads

Hello I am designing a solar oven that will be used to form denture moulds. My thoughts are designing an insulated box with a doubloe pane glass double creating a green house effect. But i would like to incorporate solar panels and a wired heated filament. My question is what is the...

Hello, total layman here. I have some questions & ideas, but no one to discuss them with, so here I am. 1. In the continuum between a completely circular orbit, and a maximally elliptical orbit, what characteristics of the orbital body and the gravitational source are the prime determinants...

i would like to design a solar assisted driving mechanism for my bicycle? What is the compatible battery specifications to power 24v 1hp dc motor and the necessary solar panel specification to charge the battery? I'm kinda clueless in this so any help would be deeply appreciated. Thanks

Solar position and velocity vectors -- Use? What are the solar position and velocity vectors used for? A program I'm working with requires them to help construct the trajectory of a meteor. Do they somehow become useful in calculating the orbit of the meteor? Aside from their use, I'm...

The panels are up. 7kW system will be 110% of our electrical needs. Grid intertie, no batteries, no pile of money up front: $109/month for the next 15 years. Plus dig the new deck I built last summer. --Chi "Happy Homeowner" Meson

Homework Statement I am reposting an edited version of this problem from a previous post of mine, due to it not being entirely relevant to that post, and also the question was asked after the thread had been replied to, so looks like an answered question. I also aim to give more detail here...

Homework Statement I am try to understand how the value of 1370 watts per metre squared for the intensity of sunlight hitting the Earth has been derived. Is there a way to see this mathematically? Homework Equations I understand about how the intensity is related to Poyntings vector, by...

And directly related to that: How can we be sure of the speed of light? I've been searching for a good answer as to how we measure the SOL and am yet to have someone give me a solid explanation. Today we shine a laser at a mirror on the moon and time how long it takes to get back. What it...

If I keep this up, I'm going to get a rep around here :). So, I recently acquired a fiberglass satellite dish which I plan to use for building a cheap, solar powered distillation machine. The idea is to have the dish, calculate the focal point, and run a double glass plated chamber at the focal...

My son is a 3rd grader and wanted to do a science fair project on solar cells. So we devised an experiment to see if reflecting light with a mirrow would increase power output. We constructed a circuit using an amp-meter, solar cell, and 10Kohm resistor. He hypothesized that reflecting sun...

Homework Statement Consider a planet in some solar system which has a mass double the mass of Earth and same density as of Earth . What is the weight of object on the planet in terms of 'W' , where 'W' is weight of object on Earth Homework Equations W=mg ... density = M / V . ...

Howdy all, I am developing a high altitude weather balloon project and I am thinking of using HDPE as a lens material for THz optics. I need to know the total heat transfer on the sheet of HDPE to see if it will reach critical temperatures. Since I am only looking for critical temperatures I...

Before reading this article please read the following: NEVER view the sun with the naked eye for any length of time, as doing so may cause irreversible eye damage or even blindness. Solar filters and solar glasses are not made to any officially regognised safety standard in all countries, and...

Hi, On various websites I read that 70% of the heat loss of a pool is by evaporation, whereas up to 85% of the solar radiation can heat an uncovered pool. We use 22mm thick black color EPE panels to cover our pool. On a sunny day, is it better to cover the pool or to leave it uncovered ...

Homework Statement Calculate the energy generation coefficient ε (J s^-s kg^-1) in the center of a 50 Solar mass Main Sequence star, assuming that all luminosity is generated in a constant density core containing one tenth of the total mass of the star. Homework Equations L=M^3.3...

Excuse the English.. it is not my first language. Sorry if this topic doesn't fit theme of board. How can build solar building model house? The temperature must stay within room temperature, outside. Any large divergence will take points off.. the time frame is eight thirty to nine thirty...

Hello I am currently building DIY solar panel.I have a problem regarding the build up of the panel. My question is can I attach the cells on to a normal transperant glass of about 5mm thick by a transperant silicon? My concern is if the cell will break or not, by the outer environment ...

Hi everyone, i'm looking for a website that can show me how the solar system was in place the minute i was born. November 6, 1982 6:32 a.m. I found this website but i don't know how precise it is. http://www.fourmilab.ch/cgi-bin/Solar please let me know! thanks.

What is the biggest hurdle for building a space based solar power system? is it the cost? All the space faring countries can come together and launch each part separately and then assemble them together just like the ISS right? Is it the transmission of power from the satellite to...

Forgive my noobness and possibly the wrong forum selection. As we live within collecting distance of an energy abundant star, would it not be possible to harness that energy, through delicately polished mirrors mounted on satellites and then direct those satellites at a few key points around...

Has anyone figured out or tried this: It seems to me that since light is bent by G fields, that looking close enough to the side of a black hole, some of that light near the event horizon may have escaped its G field after its trajectory has changed significantly... possibly redirected enough...

Hi ! Somewhere I read about our solar system is going slowly out of our galaxy (moving backward from the center, but then I can also read our solar system is approaching center with sonic speed. So how is our solar system actually moving toward the centre of milky way (beside rotation around...

For a science project, I plan to come up with a reliable way to produce clean water from the sun. I've toyed with ideas of using fresnel lenses and parabolic concentrators, but none of them solved all the problems I had. Then, I thought of using multiple—and when I say multiple I mean about...

What if you had a laser solar sail and in front of the sail was a small thruster (either chemical or itself a laser)...thrusting constantly at a right angle to the forward direction of the craft so that the sail's trajectory would bring it back towards the first (main/stationary) laser that...

Is there any effect of expansion of world on our solar system? i.e. Is there any change in distance between Earth and sun due to expansion of world?

now in many houses, there are solar water heaters the problem is that, what is the highest possible temperature reachable using the sunlight? another problem is, what if the sunlight is replaced with a laser light?

what % of solar energy is converted to solar neutrinos, assuming energy released in all forms per unit time , say 1 second as 100%?

what % of solar energy is converted to solar neutrinos, assuming energy released in all forms per unit time , say 1 second as 100%?

I want to maximize solar cell efficiency regardless of the sun's angle and so I've been looking at placing Compound Parabolic Concentrator (CPC) over the top of a high efficiency round solar cell. If I come up with a good design then I would like to try and manufacture some of them to see if I...

Hello. First time poster, many-a-year browser. I will describe my current project in the fullest detail I can and follow it with my attempted solution. I will point out off the bat that while I have a BSc in Mathematics, I had a terrible time learning physics in high school and get...

I have a question about the effects of solar and lunar tides. I know that the effect of lunar tides is twice that of solar. However when I calculated the force of gravity of the Sun on the EArth vs the Moon on Earth using F=GmM/r^2 the force due to the Sun was much greater. Can anyone help me...

Homework Statement Given the following info: Solar output(modulus of the Poynting vector): 1.4kW/m^2 Earth radius: 6370km Average Earth orbit radius: 1.49*10^11 m Find the total power output of the Sun, power received on the Earth, and the power received in Spain if its surface area is...

Hi, I am wondering how to describe a position of our solar system to some other extraterrestrial intelligence in some distant galaxy to find us? Is it possible or not? i mean if such guidance exist for any galaxy or they have to track back movement of your probe or spaceship etc. and some...

For years I have accepted the common wisdom that "the elements making up the Earth are 4.5 bn years old, therefore the Earth is 4.5 bn years old." But, upon thinking on this during Professor Brian Cox's excellent program about the evolution of things and the fact that the solar system is...

I am now waiting to go uni after alvls. I am interested to do research about solar cell. which engineering program should I take? elelctrical, mechanical?? if my uni offer me electronics in optical engineering, should I go if I wan to research in solar cell??

I found a recent article suggesting that solar storms predicted in in the next few years pose a serious threat to the electrical grid and thus to nuclear plant cooling systems: "Severe Solar Storms Could Disrupt Earth This Decade: NOAA," International Business Times...

Can we calculate the daily energy generation of 20KW power pack if have the following information: Date Time GHI DNI DHI 01-01-2008 08:00 0 0 0 01-01-2008 09:00 149 398 75 01-01-2008 10:00 348 686 98 01-01-2008 11:00 512 792 112 01-01-2008 12:00 626 845 119...

I am trying to have students build a tester with sourceMeter, lamp, etc. for solar cell efficiency measurement. Could someone give me advice on this project? Thank you very much.

I am having my home evaluated by a SunRun, Home Depot and bpsolar consortium. There was a booth in a Home Depot store in NJ. The "deal in brief": I supply the roof area for solar and they get permits, build,install, maintain and pay for the entire solar system. Then they sell me power under...

My question is basically how can a solar cell operate in forward bias? A normal diode in forward bias (with a battery connected) drives electrons from the N-side towards the pn junction where they are continuously recombining with holes (reducing the depletion zone and allowing for the flow...

If I moved in the rest frame of a solar neutrino would I still measure neutrino oscillations? Thank you for any help!

What do you think? http://www.amnh.org/nationalcenter/youngnaturalistawards/2011/images/aidan_large_08.jpg http://ca.news.yahoo.com/blogs/good-news/teen-aidan-dwyer-uses-fibonacci-sequence-solar-energy-182220725.html

This futuristic parking system was designed by Jin Yuanbiao, Gang Tang and Su Sha especially for the all-electric vehicle dubbed Solar Coco. Both the car and the parking system boast nice design and eco-friendly features. The round-shaped vehicle hassolar panels mounted on the roof. When...

A question from Chaisson & McMillan's "A Beginner's Guide to the Universe" is as follows: If the Moon orbited Earth twice as fast, but in the same orbit, the frequency of solar eclipses would (a) double; (b) be cut in half; (c) stay the same. The answer key states that the correct answer...

Visibility of a "solar shade" from a planetary surface Hello everyone, I'm a fiction writer in the process of publishing my first science-fiction novel, and have a question which I'm having trouble answering, relating to the visibility of a "solar shade" placed between a star and one of its...

NASA has captured some incredible videos http://www.nasa.gov/mission_pages/sunearth/news/News080911-xclass.html http://www.nasa.gov/mission_pages/sunearth/news/News080411-dblpunch.html There was a big blast on June 7...

hello folks, as a last year student i have told to submit a project and so I decided to work on a solar based project. Finally i came up with an idea of making solar steam engine. I will be using two different solar collector to gain high temperature of working fluid. It will be a...

One of the all-time great science mysteries is now a step closer to explanation. The surface of the sun, known as the photosphere, can reach temperatures of 5,000 degrees. To many it would seem logical that the temperature would lower further away from the sun. But, the outer atmosphere, known...

Hi. During daytime sea water having poor solar reflectivity remains warmer than the air. But at times, water has also been found to be colder than air, with the difference being 5-10 degrees C. Can anyone please justify how could that be possible?

Hi. Can anyone please tell me what would be the solar absorptivity of a steel plate painted black? Steel has got solar absorptivity of 0.65, and black paint is around 0.97. So what will be the cumulative effect of this? Is taking average of them a logical step?