Posts Tagged ‘being’

BART uses electricity to run, but what sources are being transformed in to electricity?

Monday, February 18th, 2013

Question by Gemini: BART uses electricity to run, but what sources are being transformed in to electricity?
I know that BART uses electricity to run the trains. But what sources make the electricity being used by BART, fossil fuel, natural gas or what sources?
And how much you pay for the parking in the BART parking lots? Is it still cheaper than driving a car?
The BART in the Bay Area

Best answer:

Answer by anywherebuttexas
Despite the pie-in-the-sky dreaming of environmentalists, most marginal electrical demand is going to be supplied by fossil fuel plants. True everywhere in the US.

As for the efficiency of public transportation, that’s more religion than science. The only place I’ve seen an attempt to compare the fuel efficiency of public transportation vs alternatives is in this report, on the planned 2nd Avenue Subway in NYC:

http://www.mta.info/capconstr/sas/documents/sdeis/chapter13.pdf

If you read the report, you might be surprised to discover that the subway would consume more fuel than the traffic it replaces. But read the footnotes, the real numbers are much worse. The conversion factors used are 133,000 BTU per gallon of gasoline and 3,413 BTU’s per KWHR of electricity. This is an error, which makes the subway look much better than it really is. Here’s the problem. Gasoline is burned directly in an automobile, at an efficiency of under 25%. But while electricity is consumed at an efficiency of 80% for the electric subway motor, it takes a considerably greater amount of energy to create the power consumed. In order to deliver 1 KWHR to the power outlet, a source must be consuming more than 1 KWHR worth of fuel. I’ll explain:

Since there is next to no opportunity for wind or solar power in NYC, and no nuclear plant has been build there in 50 years, marginal demand must be met by fossil fuel plants. A steam turbine plant fueled by natural gas or oil is perhaps 35% efficient, but let’s be generous and say 50%. The distribution network…power lines and transformers…might operate at 95% efficiency. Finally, subways in NY run on DC power, so what comes off the line must be rectified, at perhaps 75% efficiency. If you start with enough natural gas to produce 1000KWHRS, you end up with 1000x.50x.95x.75 KWHRS, only 356 KWHRS is actually delivered to the electric motor. If the electric motor is 80% efficient, 284 KWHRS actually produces useful work. If 1000 KWHRS of gasoline is burned in a 25% efficient car, 250 KWHRS actually produce useful work.

While the motors end up being of comparable efficiency, the subway system turns has a much lower load factor than the car. That is, if two people ride in a car, it’s about half loaded. That’s the way it’s going to be on average. A subway car must roll up and down the track day and night, in order to provide a reasonably attractive alternative. But it’s only running at it’s full rated load factor for about four hours a day. The rest of the time, energy is expended pushing mostly empty cars up and down the track. All in all, it would be more fuel efficient to drive a Hummer than take a subway.

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Is lionel messi an human being?

Wednesday, February 6th, 2013

Question by Apolola: Is lionel messi an human being?
For a person to be playing football of next 22 century right now in 21 century so it’s outstanding, phenomenom and extraordinary.

Best answer:

Answer by X
3 years ago, Thierry Henry said this about Leo Messi:

“Like any great player he’s a fighter, he can’t lose. During training sessions if his team loses 2-1, he’ll get the ball, dribble around everyone and score, and we have to start again from scratch.”

“On Tuesday, (after his spectacular 4 goals demolition of Henry’s former team) in the changing room, I started staring at him. He asked: ‘What???’”

“I just laughed and left him. What can you say to such a guy? He is just so strong (physically and mentally).”

“Leo is not human. That is the truth.”

That means something coming from a player of Henry’s class.

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Derailed locomotive being re-railed on the SWP, 7/11/2001…

Saturday, August 18th, 2012

A SWP (Southwest Pennsylvania Railroad) 2001 derailed on its way to pickup a cut of loaded coal hoppers in Connellsville. On their way down , the rail rolled under the weight of the third unit. They uncoupled the first two, and then proceeded to rerail the locomotive. It doesn’t take long, as the crossing acted like a rerailer, just like in model trains. 2001 is rebuilt GP11. July 11, 2001. Thanks for watching….
Video Rating: 4 / 5

If an overload indicator’s light is lit, does that mean the power is being cut to it?

Tuesday, July 31st, 2012

Question by AJ: If an overload indicator’s light is lit, does that mean the power is being cut to it?
I have a model railroad and my power supply has an overload indicator/relay on it. I have been wondering about this because it has gone off before, when it is lit, does that mean that it is cutting power to it and there is an overload in the circuit, or is there still current flowing and there was an overload detected?

Best answer:

Answer by Bud Vet
You need a bigger power supply. The power supply you have probably still is puttting out but its letting you know its overlaoded. A direct short will open the circuit and the supply will not produce any current typically.

What do you think? Answer below!

How are Sun Spot numbers being calculated?

Saturday, March 3rd, 2012

Question by Jeff Engr: How are Sun Spot numbers being calculated?
How are they calculating the sun spot numbers? I asked this in another seciton on this forum and am getting no serious answers. I placing same question here as I value many of the opinions on this section even those I disagree with… Please only reasonable answers, this is an honest scientific curiosity for me.

i.e.
For May 2 there was one sun spot #1203 and the sunspot number was 57

For May 3 there are 4 sun spots #1200, 1203, 1204, and 1205 but the sunspot number is 51

The equation they give is R=k (10g+s)

where R is the sunspot number; g is the number of sunspot groups on the solar disk; s is the total number of individual spots in all the groups; and k is a variable scaling factor (usually <1) that accounts for observing conditions and the type of telescope (binoculars, space telescopes, etc.). Scientists combine data from lots of observatories -- each with its own k factor -- to arrive at a daily value. so unless k varies VERY widely, the sunspot numbers they are giving us appear to be bunk. Please help. How large can k get? during the deep solar minimum k was almost never less than 1... The equation comes from the website http://www.spaceweather.com/ which is run by Dr. Tony Phillips I think from NASA but I'm not sure on that... I am honestly looking for a reasonable explanation from someone who has at least a minimal level of scientific training. I am asking because I thought I understood how it is done, but based on # of sunspot groups and total number of spots, the only explanation I can find for the widely varying sunspot values is due to a widely varying value for the variable k. Given that, I really want to know how a value for k is determined. Saying scientists do it is good for grade school children, but not for those of us who know mathematics physics etc and have legitimate questions. for k to have true scientific value then how a value for k is determined is HIGHLY relevant and should be determined based on a set algorithm. I'd like to better understand that algorithm... Best answer:

Answer by Peter J
This answers it very clearly…

http://spaceweather.com/glossary/sunspotnumber.html

This explains the “K” factor
http://sidc.oma.be/news/106/sunspotnumberclarified.pdf

The K factor is more sensibly calculated than trusting a single thermometer in the arctic to tell us the average temperature of thousands of square miles of arctic.

What do you think? Answer below!

What is your opinion N.Va. enforces immigration laws illegal aliens being arrested as Ariz. rages?

Thursday, February 2nd, 2012

Question by Maricopa County: What is your opinion N.Va. enforces immigration laws illegal aliens being arrested as Ariz. rages?
The national outcry over Arizona’s immigration law is nothing new for Prince William County residents — hundreds ofpeople on both sides of the illegal immigration debate poured into marathon public hearings in fall 2007 when the county was passing its crackdown.

Since then, the county has turned over more than 2,000 suspected illegal immigrants to the federal government, and crime last year reached a 15-year low.

Other Northern Virginia jurisdictions also have turned over hundreds of suspected illegal immigrants to Immigration and Customs Enforcement through their own programs.

But law enforcement officials remain wary about their new roles enforcing federal law, and immigration experts and immigrant advocates warn that such steps can have negative consequences, such as racial profiling and a loss of trust with local police
Implementing Prince William’s crackdown involved drafting a legally soundpolicy and training hundreds of officers, as well as conducting a significant community outreach program with more than 300 meetings, said Deputy Police Chief Barry Barnard.

“It was a new role for us,” he said. “Traditionally, local law enforcement doesn’t enforce immigration laws.”

The county partnered with the federal government under the 287(g) program, which allows local law enforcement officials to enforce certain immigration laws.

Prince William’s original proposal was so sweeping that it asked county officials if it would be possible to keep illegal immigrants off county roads and away from the county Web site.

County supervisors scaled back the measure, voting in October 2007 to direct police officers to check the residency status of crime suspects if they had probable cause to believe they were in the country illegally.

In 2008, the policy was changed to require officers to check the status of everyone arrested. Officers then had to be retrained, Barnard said.

Loudoun also participates in 287(g), as well as the federal Secure Communities program, which Sheriff Stephen O. Simspon said he prefers because it runs fingerprints of everyone arrested through biometric immigration records held by the Department of Homeland Security and FBI criminal records

Read more at the Washington Examiner: http://www.washingtonexaminer.com/local/No_-Va_-enforces-immigration-as-Arizona-rages-92335879.html#ixzz0mRGqIZZF

Best answer:

Answer by Nurse1
Enter this country legally and you won’t have a problem. Simple as it gets. Stop making excuses for criminals. And for the record, I do realize that not all illegal immigrants come from Mexico and other Spanish speaking countries.

What do you think? Answer below!

being an air hostess. is training really important as a pre req for recruitment?

Tuesday, January 10th, 2012

Question by : being an air hostess. is training really important as a pre req for recruitment?
im 5’7″, done modelling earlier (only to pay for my own fees while in college) and currently pursuing animation studies. but now i am tired of my animation course and the guys are far more talented than my student work and i feel demoralised and accept that while animation industry may b tough for me, job of an air hostess might prove to be better for me.
i know that i am well groomed, know the ethics and meet all the requirements for an air hostess. i am also aware that the job is only glamorous on the outside and that, an air hostess has to take rude passengers in her stride and yet b as polite and stuff..
i have heard about various air hostess training n grooming institutes that help the girls get through with interviews and get selected. but i dont intend to do that because i feel most of them are only doing business and cheat the girls with high course fees.
i would like to know if the airlines’ recruiters only select candidates who have done the grooming courses from those “air hostess training” sort of institutes, or can i walk into an interview right away?
kindly let me know.
i am already 22.. in2-3years, even airlines wont look at me for recruitment, lol. so i need to make a quick decision..
thanx. . 🙂 all answers will b appreciated and the rude ones shall b reported. lol
please be genuine. i alone know right now how confused i am. thank you once again.

I KNOW THAT THIS QUESTION IS ASKED IN THE WRONG SECTION, BUT I COULD NOT FETCH ANY ANSWERS IN ITS CATEGORY. SINCE I AM AWARE THAT THIS SECTION IS VERY ACTIVE, I HOPE TO RECEIVE SOME ANSWERS.

THANX 🙂

Best answer:

Answer by Mr. X
Airline jobs are hard to get because they pay good benefits but there are quite a few airlines so you can try other airlines than the one you applied to, I think you still have a chance.

Know better? Leave your own answer in the comments!

The kid and Thomas being cheeky

Thursday, December 29th, 2011

The kid and Thomas being cheeky

Image by digitalcole
The kid playing with his toy train.

The kid and Thomas being cheeky

Thursday, December 29th, 2011

The kid and Thomas being cheeky

Image by digitalcole
The kid playing with his toy train.

being an air hostess. is training really important or a pre req for recruitment?

Tuesday, December 20th, 2011

Question by : being an air hostess. is training really important or a pre req for recruitment?
im 5’7″, done modelling earlier (only to pay for my own fees while in college) and currently pursuing animation studies. but now i am tired of my animation course and the guys are far more talented than my student work and i feel demoralised and accept that while animation industry may b tough for me, job of an air hostess might prove to be better for me.
i know that i am well groomed, know the ethics and meet all the requirements for an air hostess. i am also aware that the job is only glamorous on the outside and that, an air hostess has to take rude passengers in her stride and yet b as polite and stuff..
i have heard about various air hostess training n grooming institutes that help the girls get through with interviews and get selected. but i dont intend to do that because i feel most of them are only doing business and cheat the girls with high course fees.
i would like to know if the airlines’ recruiters only select candidates who have done the grooming courses from those “air hostess training” sort of institutes, or can i walk into an interview right away?
kindly let me know.
i am already 22.. in2-3years, even airlines wont look at me for recruitment, lol. so i need to make a quick decision..
thanx. . 🙂 all answers will b appreciated and the rude ones shall b reported. lol
please be genuine. i alone know right now how confused i am. thank you once again.

Best answer:

Answer by zafir
Flight attendant schools are a complete waste of money. Apply directly to the airlines that interest you. All airlines have a Careers section on their websites, though sometimes you have to search for it, and this area lists the requirements for flight attendants. Generally, apart from being over 18, you need to have graduated high school and have a first aid certificate. Knowing a second language also helps. Once you’re accepted by an airline you go through a training course, and that’s all you need to know. Save your money, and go straight to the airlines.

Know better? Leave your own answer in the comments!

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