Home Definition and 516 Threads

Homework Statement A man walks on a straight road from his home to market 2.5km away with a speed of 5km/h. Finding the market closed, he instantly turns and walk back home with a speed of 7.5km/h. For the given time intervals (i) 0 to 30minutes. (ii) 0 to 50minutes., (iii) 0 to40 min...

I've never read this explicitly, but here is what I've concluded: If you could somehow have a perfectly balanced load on the circuits in your home to each of the 2 hot lines coming into your residence from the pole mounted transformer, this would mean: The neutral wire connected from your...

My friend asked me why do houses have electrical sockets that output a constant voltage rather than a constant current. For the life of me, I couldn't answer it.. Anyone help me out? Thanks, DM

I'm highly interested in the studies of particle physics as well as quantum mechanics. Are there any experiments I can try at home to demonstrate some of the more fundamental ideas related to these areas? Thank you for your time.

I am making homemade ac. I am using an ice box for it. I found the link on the internet http://www.instructables.com/id/Cheap-DIY-Air-Conditioner/ I want to ask is 1. The fan which is used must get heated by the operation 2. This will produce a lot of heat 3. This will melt the ice or take...

Homework Statement A car accelerates from 0 to 30m s ^-1 in 5.0 seconds, travels at a constant 30m s^-1 for 15.0 seconds and then brakes to a stop in 10.0 seconds. 1) calcualte the acceleration (assumed constant) in each section of the motion. 2) calculate distance travelled 3) what is...

Is it even possible to do so? I used a thick paper sheet with 1x5 mm slits 5mm apart with a normal flashlight (just to do a rough test). I saw what looked like the patches of light with darkness in between, but it was very, very faint.. Is it possible to do an effective model with easy-to-get...

I am in the market for a soda machine and/or pop machine. I drink diet cola and my wife drinks Perrier (though I may switch to straight soda). We're figuring it would be cost effective as well as more convenient to get our own machine - if they work. Does anyone have any experience or...

"Work from Home" scams Hey all. I'm looking at various work from home websites that supposedly will pay you for posting ads and various other tasks. However I am a little skeptical of many of them, especially ones that require you to purchase 100 bucks for a kit to be mailed to you. Has anyone...

Wow, just wow. Where dig they dig up this 911 call person? The transcript is ridiculous. For people not aware of the case, Josh Powell was under investigation for murdering his wife. When his children showed up for a court supervised visit with their father, he locked the supervisor out...

Homework Statement A baseball slugger connects with a pitch 4 ft above the ground. The ball heads toward the 10-ft-high center-field fence, 455 ft away. The ball leaves the bat with a velocity of 125 ft/s and a slope of 3 vertical to 4 horizontal. Neglecting air resistance, determine whether...

Hi, Can you name a few house hold items that have a solenoid in them?APART FROM A DOOR BELL. Especially those which can be carried in hand. Thanks.

1. Photons approaching a black hole will initially a. all of the above are possible depending on distance from the event horizon b. pass by with their direction changing (bending/curving) c. fall into the black hole d. go into orbit around the black hole e. pass by without...

Has anyone used a home DNA testing service? I was looking at 23andme service. The reviews are pretty good and it's only $100. Could be interesting. What do you experts think? Worthwhile?

I'm trying to perform young's double slit experiment at home and I need assistance. Several problems arise such as what should be used as the light source (laser vs low watt bulb) and the photon detector (photomultiplier vs phototransistor). My goal is to replicate the scenario where one...

Hello, some time ago I had a little idea which was posted here: http://asterisk.apod.com/viewtopic.php?f=39&t=21247 (see the last post) Maybe some minds about such possibility to explain the phenomenon?

So i have to had my central heating fixed 6 times, my loo 3 times, the problem is i have to go through an answering service every time, how does one nail the contractors?

Dear Experts Happy Holidays everyone! I found out that the electric wires of my home water heater gets very warm when I use the heater for normal showering. There are 3 wires : Earth , Neutral and Live wires. I unscrewed open the power socket and power plug. The wires are melting the...

Hi Guys, I'm currently doing my final year project which my title is to design a remote sensor to monitor home electrical apparatus by using hall effect sensor. I've build a basic circuit and amplifier to test my hall effect sensor ic ( linear) with a magnet. Everything works fine and now...

Making your home more "green"? So we're closing on a house in about a week though we don't plan on moving in until the beginning of January. It was built in 1986 so it's not that old. The windows are fine (Except one in the garage), and we have to put more insulation in the attic. 2 -Story...

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

In maths in school we are starting to do a lot of problems involving integral and differential calculus as well as general algebra. The problem is while I can see the correct method of going about obtaining a solution it takes me a long time to get there as the integration and stuff takes up...

Is there any point in doing a theoretical/astrophysics degree from home, even if you are able to achieve exceptionally good grades, what about people who are agoraphobic and can't get to a uni?

Any tips on how to start (I've already looked at www.fusor.net) and what the projected costs would be? I'm looking to complete this by the end of the year.

Any ideas for home study second degree? Hi guys, I'm one of the many thousands of people that did completely the wrong degree and I'm now stuck wanting to do Mech Eng, which I should have done the first time around. I enrolled at Bristol Uni a couple of years ago, but had to drop out during...

1. a projectile is fired into the air at a projection angle of 30° above the ground. its initial speed is 327 m/s. what is its speed 3 seconds later 2.the speed of a projectile at its maximum height was 40% of its speed at ground level. find the angle of elevation. 3.a man stands on a...

Homework Statement an autombile 2200kg moves with a velocity of 32m/s on a level road. a comstant braking force of 6000N is applied to the automobile wheels bringing it to a stop eventually a) what distance will the vehicle travel after the brake are applied? b) calcutate the work done by...

G'Day guys, We have been looking around and feel this would be an appropriate forum full of good knowledgeable people to ask a few challenging questions. The missus an I are about to build a house on a mountain top that is the highest peak for at least 1-2 km's (1 mile or more). Obviously...

Hi, I am interested in building precise machine in home. I don't have a clear idea of what the machine looks like yet. But it involves high precision to do calculation. Is it possible to build such machine myself in home? What tool do I need to use?

I just got my MSP-430 (microcontroller kit with two micros for $4.30) and I' just awestruck by how easy it is to use. I am looking to make a few very low-power circuits here and there for my car. For example, one to lock the doors after 30 seconds when I press a button. What do you guys like...

If a person in USA makes a wind turbine or some sort of other power generator and has more power left over,can he supply that to the national power grid and earn money?If so how much?

hye... i new user (forumer)... help me... 1) -what is voltage stabilizer? -application -effect - DIY circuit 2) fuse for voltage stabilizer? why use fuse for car = 20A motor = 10 A home = 13A tqvm...

If its possible at all

Homework Statement The power consumption by a typical house is 1 kW. If the kinetic energy of a car (mass 130 kg) is equal to the total energy used by the house in 1.2 minute, what is the car’s speed? Homework Equations P=W/t P=Fv P:Power The Attempt at a Solution I converted 1kW to 1000...

The title really says it all.

Homework Statement A particle moves along the x-axis with velocity vx = (9.7 m/s2)t - 6.0 m/s. (b) Sketch vx versus t over the interval 0 < t < 10 s. (Do this on paper. Your instructor may ask you to turn in this work.) (c) How do the instantaneous accelerations at the middle of each...

The idea I have is that on a multi fuel stove I could have a boiler attached to it to heat water for the purpose of steam, then the steam in turn to drive a small steam turbine to produce electricity and the steam then to condense and return to water. Thus allowing the process to start again...

I haven't been able to find a satisfactory answer. What would save the most electricity? One of my roomates and some of the neighbors below us think that it is better to leave the air conditioner on all day. Normally, for just one house with one air conditioner, I would be very skeptical: I...

I have taken all maths through Calculus I in high school, which was back in 2008. I am back in college again, this time with a renewed interest in math and philosophy. Without going into too much detail, I think it safe to say that the last thing on my mind in high school was school, which I...

http://hosted.ap.org/dynamic/stories/E/EU_SWEDEN_NUCLEAR?SITE=AP&SECTION=HOME&TEMPLATE=DEFAULT&CTIME=2011-08-03-11-33-45 STOCKHOLM (AP) -- A Swedish man who was arrested after trying to split atoms in his kitchen said Wednesday he was only doing it as a hobby.

I know that for the longest time we have been listening to radio waves for some sign of life. I also recently heard that SETI was shut down do to lack of funds recently :cry:. I was just wondering, if there is another intelligent space faring race out there that was capable of extra-solar travel...

Homework Statement Two Charges +q and -3q are separated by a distance of 1 m. At what point in between the charges on its axis is the potential is zero. Homework Equations I formulated the diagram as given in the attachment The Attempt at a Solution At equilibrium V1 = V2...

How to accelerate ions at home? I am really interested in accelerating some metal ions at home but don't really know where to start... I am willing to reach 30 keV... Is it even possible? Are there any alternative ways of doing this other than using accelerators? Many thanks for your...

I'm no baseball fan, but this is pretty cool: https://www.youtube.com/watch?v=PuenNby2Csk

Hi everyone, I'm an 11th grade high school student trying to build a home science/math library. I love physics, math and computer science. I could care less about don't find chemistry or biology to be very relevant to what I like doing, but it might be good to have a few general references...

http://www.nwitimes.com/news/local/govt-and-politics/article_ec169697-a19e-525f-a532-81b3df229697.html

I've been thinking abut getting some MOSFETs to play around with (my classes skipped right over that particular section), specifically some http://www.fairchildsemi.com/ds/2N%2F2N7000.pdf" from Mouser. However, I've read in my textbook that MOSFETs, because of their insulated gate, can be...

This is either too obvious or too complicated for me. As a recent grad from a trade school for wind technologies I wanted to explore a what if scenario: Suppose three high output auto alternators (like say crown vic ) were wired primary coil to 115vac house plug in a parallel connection rather...

So I finish my first year as a Physics and Math double major in a couple of days. I was all set and excited for going back home for the summer [bought my plane ticket and everything (its Pakistan)] until I found out that a couple of my friends were staying back and doing research with a...

For some reason, my WS_FTP95 LE program (originally from Ipswitch) did not transfer to my new computer (with Windows 7). To transfer, replace or update the program, would you have a direct link where I can get the program for free or do you have another recommendation? Ipswitch does not make...