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Posts Tagged ‘energy conservation’

energy conservation for kids, Horizon Utilities Corporation, Hamilton, Ontario, Canada

Duration : 0:2:35

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Technorati Tags: CFL, conservation, Electricity, energy, energy conservation, Energy Conservation Tips, kids, Light Bulb, Lighting, lights, phantom power, saving electricity, saving power, tips

renewable energy offers a long term solution to the problems caused by our use of fossil fuels, but if we want to make an immediate impact, the best place to start is energy conservation. This DVD takes the audience on a tour of an energy efficient house to show how the average home can cut energy use.

Duration : 0:5:1

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Technorati Tags: classroom, conservation, DVD, earth science, energy, energy conservation, Energy Efficient House, fossil, fuels, house, planet, renewable, social studies, students

In conservation of energy, for example throwing a ball up and catching it, how does air resistance (non free fall) impact the conservation of energy? Is it because energy is lost due to work done on the air?

"What is the effect of air resistance on the conservation of energy?"
It doesn’t change the idea of conservation of energy, but it makes calculations using it more difficult.

"Is it because energy is lost due to work done on the air?"
Yes. Air resistance creates lower final energy values than we calculate if we neglect it.
So the ball wouldn’t go as high or fall back as fast as you would predict if you neglected air resistance.

Without air resistance conservation of energy tells us that:

mv^2/2 = mgh

where v is the velocity at which the ball left your hand and h is the maximum height. The mass m cancels and we can write:

v^2/2 = gh, so h = v^2/2g

If we consider air resistance we have to write:

mv^2/2 = mgh + A

Where A is the energy lost to air resistance.

Notice that mass no longer cancels. We can solve for h :
v^2/2g – A/mg = h

this is less than
v^2/2g

Technorati Tags: 2g, Air Resistance, Conservation Of Energy, energy conservation, Energy Values, Free Energy, Gh, Lost, Maximum Height, Mv, Quot, velocity, Yes Air

In areas where accidental impact or deliberate criminal mischief can shatter overhead lights, commercial vandal proof ceiling mount lighting fixtures offer a form of lighting whose higher impact and scratch resistance makes them extremely difficult to break, dislodge, or tamper with. Vandal proof, ceiling mount light fixtures offer schools, public buildings, shopping malls, and indoor apartments and condominiums a long-term, reliable source of lighting that will require only occasional maintenance. Many of these commercial ceiling mount lights also offer significant improvements in thermal management and energy conservation, making it possible for them to significantly lower your client’s light bill.

In areas where accidental impact or deliberate criminal mischief can shatter overhead lights, commercial vandal proof ceiling mount lighting fixtures offer a form of lighting whose higher impact and scratch resistance makes them extremely difficult to break, dislodge, or tamper with. Vandal proof, ceiling mount light fixtures offer schools, public buildings, shopping malls, and indoor apartments and condominiums a long-term, reliable source of lighting that will require only occasional maintenance. Many of these commercial ceiling mount lights also offer significant improvements in thermal management and energy conservation, making it possible for them to significantly lower your client’s light bill.

These three factors: longer lifespan, resistance to impact, and energy efficiency, make vandal proof ceiling mount light fixtures ideal for clients who are hesitant to invest in something they truly need to curb the rising costs of operations. Showing them on paper a calculated reduction in electrical costs, and showing them as well how many years the fixtures can be expected to last without having to accrue further replacement and labor costs can soften the blow of the invoice, so to speak. Your clients can see the math clearly laid out on the table. The monthly savings that compound after installing commercial overhead vandal proof lighting represents a new revenue stream that pays the company back for the cost of the equipment, and the resistance of these lights to tampering further ensures the viability of their investment.

RLLD Commercial Lighting further ensures fixture lifespan not only with vandal proof design, but also commercial lighting manufacturer warranties back up in writing. Every fixture we sell, without exception, is a commercial or specification grade luminaire made in the USA. There are no retail grade substitutions in our inventory, and we refuse to import parts or fixtures from any manufacturers overseas. Clients who may be tempted to run down to the hardware store and buy commercial ceiling mounted lighting fixtures themselves, then have an electrician on staff install them, don’t have to shortchange themselves on quality or compounded losses when the fixtures fail and have to be replaced. With our equipment, they can be assured that a onetime investment will carry itself through the recession, and them along with it.

RLLD Commercial Lighting offers several distinctive types of commercial vandal proof ceiling mount lights, giving you the freedom to match fixtures precisely to client needs.

Fluorescent Ceiling Mount Lights

RLLD commercial lighting ceiling mount fluorescents 26, 32, or 42-watt compact commercial grade fluorescent included. These vandal-proof, ceiling mounted lights come in either white and bronze finishes to, and they are UL listed for all regions of the United States and are ideal for small school districts and government buildings in small and mid-sized cities.

HPS Ceiling Mount, Vandal Proof Fixtures

High-pressure sodium lamps provide a compact, high output form of vandal proof lighting in cramped quarters. We have high-pressure sodium fixtures that feature a lamp life of 24,000 hours in almost every situation and lighting environment. Like their fluorescent equivalents, they are meant to operate without fail in damp and wet areas as well as dry regions of the country. Most fixtures feature die cast aluminum housing with a transparent polycarbonate refractor.

Our high-wattage and low wattage models are available to cover the full gamut of indoor and outdoor lighting needs, and all fixtures come with lamps included.

Metal Halide Vandal Proof Lights

RLLD Commercial Lighting offers quartz restrike metal halide ceiling mounted fixtures with vandal proof lens covers. These lights will immediately come back on in the event your client suffers a power failure. The average lamp life of standard models is approximately 10,000 hours. These lamps are so bright that many contractors install them as supplemental security lights. RLLD Commercial Lighting also sells Indoor low voltage equivalents offer the same essential value package with lower wattage and a longer lamp life of up to 15,000 hours.

Our specialists will help you determine which fixture types, wattages, and lamp options best meet the needs of your client by performing a full photometric analysis of your client’s location. This will show us all that is necessary to determine the exact number of fixtures you will need, how much light they will have to produce, where to best mount them, and what lamps and wattages will most effectively accommodate all requirements above. The cost of the analysis will be deducted from your equipment invoice at the time you purchase the equipment.

R. Neal
http://www.articlesbase.com/business-articles/commercial-vandal-proof-ceiling-mounted-light-fixtures-728772.html

Technorati Tags: Apartments, Ceiling Lighting, Commercial Lighting, Condominiums, Criminal Mischief, Electrical Costs, energy conservation, Energy Efficiency, Invoice, Lifespan, Light Fixtures, Lighting Fixtures, Occasional Maintenance, Public Buildings, Scratch Resistance, Shopping Malls, Significant Improvements, Tamper Proof, Thermal Management, Vandal Proof

Pace handicapping is about understanding the energy dynamics of a race and developing a successful predictive strategy. Knowing when and how a horse is likely to use his energy can tell you remarkable things about a horserace before the horses ever leave the gate.

Horses have a preferred method of running, and left to their own devices, will usually run in the style that is comfortable for them. Knowing how each horse in a race is likely to behave will give you valuable information about the nature of the race, which horses are at an advantage, and what the likely outcome will be.

Three Horse Types

Although some handicappers use more, horses are generally separated into three major pace types: the frontrunner, mid-pack runner, and later runner. Depending on the mix of pace types in a race, either initial speed or energy conservation will prove to be the winning approach. Determining which will be more important and which horse is up to the challenge is the goal of pace analysis.

Front Runner

Early pace horses want to run at the head of the pack. Their competitive nature is so prominent that if they are not able to run on the lead, they will usually fall out of contention completely. The more frontrunners in the race, the faster the early pace will be. This places early pace horses at the risk of exhausting themselves before the final stages of the race, giving the mid-pack and late horses an opportunity to take advantage of their reserves of energy to pass them.

Mid-Pack Horses

Mid-pack horses like to stay behind the leaders, but not too far back. As the lead horses begin to tire, mid-pack horses have good position and reserves of energy that they can use to gain and sustain the lead. In fast paced races, mid-pack horses in good condition are always a threat to the frontrunners.

A problem with the mid-pack horse is that, being close to the lead, he is still vulnerable to over extending himself and falling prey to the same problems as the frontrunners. Although this happens less often than with frontrunners, it´s still a consideration in fast paced races.

Late Runners

Later runners are the horses that bring up the rear. They are usually in the bottom third of the pack. They are a poor bet in races where a speed duel is unlikely. The major problem with this running type is that in most races they are too far back when they finally make their move. They are also logistically disadvantaged, having to come to the front through ranks of other horses, or worse, on the outside.

The one scenario in which late running horses shine is when there is a very fast early pace. When a race results in a pace war with such a brutally fast pace that even the mid-pack horses are compromised, or there are no quality mid-pack runners, the late runners are likely candidates for the win. When this happens, the payouts are usually huge.

Pace handicapping can be an important part of a winning strategy if you take the time to evaluate the race as a whole. Multiple early pace horses set the stage for fast paced races. The faster the pace, the more likely an upset will occur, allowing a horse running off the lead to gain the advantage. Predictive race analysis can tell you what racing style to look for in your candidate, and what the potential pitfalls are.

JT
http://www.articlesbase.com/sports-and-fitness-articles/horse-racing-understanding-pace-408867.html

Technorati Tags: Contention, energy conservation, Energy Dynamics, Frontrunners, Handicappers, Horse Handicapping, Horse Race, Horse Racing, Horserace, Initial Speed, Pace Handicapping, Pace Pace, Pack Horse, Pack Horses, Preferred Method, Prey, Risk, Separated Into Three