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# Topic: Miles per hour

###### In the News (Tue 21 May 13)

 Knots versus Miles per Hour Both miles per hour and knots is a speed which is the number of units of distance that is covered for a certain amount of time. To do this problem easily, one can multiply the number of miles per hour that the train is moving by the number of feet per hour that = 1 mph. Since the speed of sound varies with the density of air (or whatever material it is transmitted through), one needs to determine the density of the air the aircraft is flying through. oceanpark.com /notes/knots_miles_per_hour_speed_of_sound.html   (318 words)

 Knots versus Miles per Hour Both miles per hour and knots is a speed which is the number of units of distance that is covered for a certain amount of time. To do this problem easily, one can multiply the number of miles per hour that the train is moving by the number of feet per hour that = 1 mph. Since the speed of sound varies with the density of air (or whatever material it is transmitted through), one needs to determine the density of the air the aircraft is flying through. www.grc.nasa.gov /WWW/K-12/WindTunnel/Activities/knots_vs_mph.html   (318 words)

 Discovery Online, The Skinny On ... Why Toilet Bowl Water Twirls Clockwise The ground here is moving under the cube of air at 740 miles per hour, but the cube of air continues tooling along at 1,040 miles per hour. Whereas it was stationary relative to the Amazon, now it's moving east at 290 miles per hour, relative to its new home on the 45th parallel. It takes a mass of air many miles in diameter to demonstrate the infamous toilet twirl, and even then, Coriolis is often foiled by friction with the ground and barometric high jinks. www.discovery.com /area/skinnyon/skinnyon970523/skinny1.html   (852 words)

 Miles per hour - Wikicars Miles per hour is a unit of speed, expressing the number of international miles covered per hour. When converting miles per hour to another unit of measurement, or vice versa, it helps a lot to know exactly how miles and hours are related to other units of distance and time, respectively. Miles per hour is the unit used for speed limits on roads in the United Kingdom, United States and various other nations. wikicars.org /en/Mph   (187 words)

 Simple Gliders in the Science and Mathematics Curriculum To convert feet per second to miles per hour, you convert feet to miles by dividing by 5,280 and convert per second to per hour by multiplying by 3,600. Another way to remember this is that 60 miles per hour is 88 feet per second, or 15 miles per hour is 22 feet per second. The speed in miles per hour will always be less than the speed in feet per second by the same ratio, so you can convert speed in feet per second by dividing it by 22 and multiplying it by 15 to get miles per hour. www.maxconrad.com /Hinzgliders.htm   (2217 words)

 10 MPH }{ Segway roadtrip across America }{ A Documentary Film 10 MPH is a comical documentary that follows a pair of aspiring filmmakers as they quit their jobs and turn a friend's ludicrous idea into a movie. The impulsive purchase of a two-wheeled Segway scooter sets this story in motion when the two friends decide to travel from Seattle to Boston at 10 MPH in an attempt to change their lives forever... What ensues is a road trip like none other with a haphazard cast of characters you could only find on a zany 100-day trek through America's back roads. www.10mph.com   (193 words)

 Fantasy NASCAR - Newsbreakers - Fanball.com Carl Edwards posted the quickest average speed in Happy Hour, with a speed of 126.675 mph during 20 laps. His average speed of 125.848 mph during 47 laps was eighth best, but coupled with his fast times in the morning session, he remains a good value. Kurt Busch posted the quickest average speed in the morning session, with a speed of 184.368 miles per hour. www.fanball.com /NASCAR/newsbreakers.cfm   (1054 words)

 First Stellar Outcast Speeding at Over 1.5 Million Miles Per Hour First Stellar Outcast Speeding at Over 1.5 Million Miles Per Hour Using the MMT Observatory in Tucson, AZ, astronomers at the Harvard-Smithsonian Center for Astrophysics (CfA) are the first to report the discovery of a star leaving our galaxy, speeding along at over 1.5 million miles per hour. This incredible speed likely resulted from a close encounter with the Milky Way's central fl hole, which flung the star outward like a stone from a slingshot. www.physorg.com /news2985.html   (613 words)

 Used Cars - How to Examine a Used Car Before Buying The average car is made to last about 150,000 miles or longer. Life really would be simple if you could just look at a car's odometer and deduct the mileage from 150,000 to determine how much life a car has left. To test the brakes, accelerate to 30 to 40 miles per hour. www.usedcars.vc /examine.html   (1717 words)

 VCU Police Department: Speed Enforcement Page With the exception of a few locations, the speed limit within the VCU campus area is 25 miles per hour. On West Broad Street, from the intersection at Belvidere Street westbound, the speed limit is 35 miles per hour. This continues into the MCV campus where the speed limit for the entire MCV campus area is 25 miles per hour. www.vcu.edu /police/radar.html   (432 words)

 Gold Cup Racers Aim at 200 Miles per Hour [1957] The fastest heat in the 1947 Gold Cup race was turned at an average of 56.8 miles per hour by a boat powered by a 1500 horsepower engine. Sayres found that the needle of his water speedometer was banging against the pin on every run and the speedometer was calibrated to 150 miles per hour. This is a bigger engine than the jet used by Donald Campbell in setting his world water record of 225.63 miles per hour in the Bluebird, and Jones sees no problem in getting the speed up to 300 miles per hour. www.lesliefield.com /other_history/gold_cup_racers_aim_at_200_miles_an_hour.htm   (1560 words)

 Speed Limit Enforcement The maximum speed limit is 65 miles per hour on rural interstates, 55 miles per hour on interstate highways near or in major cities and on other highways, and 30 miles per hour in an urban area unless some other speed restriction is established. Bail for speeding more than 20 miles per hour over the posted limit, but not more than 30 miles per hour over the posted limit, is \$95 cash or in lieu of such amount, his/her current Illinois driver's license or an approved bond certificate. Bail for speeding more than 30 miles per hour over the posted speed limit is \$105 cash or in lieu of such amount, his/her driver's license or an approved bond certificate. www.isp.state.il.us /traffic/speedlimitenf.cfm   (832 words)

 NPWRC :: Migration of Birds One often hears stories of birds flying "a mile a minute." While undoubtedly some birds do attain this speed, such cases are exceptional; and it is safe to say that, even when pressed, few can develop an air speed of 60 miles per hour. A sustained flight of 10 hours per day in still air would carry herons, hawks, crows, and smaller birds from 100 to 250 miles, while ducks and geese might travel as much as 400 to 500 miles in the same period. A fairly uniform average distance of 30 to 35 miles per day is maintained from the Gulf to Minnesota, but a week later this species has reached the central part of the Mackenzie Valley, and by the following week it is observed in northwestern Alaska. www.npwrc.usgs.gov /resource/birds/migratio/speed.htm   (2326 words)

 Hugg / 80 Miles Per Hour, 200 Miles Per Charge, Late 2007   (Site not responding. Last check: ) Miles, a Chinese company, has a cute little, street legal, electric hatch back for under \$15,000. Sadly, it only does 25 miles per hour and 40 miles to the charge. They do have plans for a 80 miles per hour, 200 miles per charge, \$28,500 electric car to be shown late next year. www.hugg.com /story/80-Miles-Per-Hour-200-Miles-Per-Charge-Late-2007-1   (416 words)

 SPEED IN MILES PER HOUR KILOMETERS PER HOUR AND KNOTS CONVERSION FORMULAE AND TABLES The common abbreviation in everyday use is mph, although mi/h, using the SI method of expressing derived units, is sometimes used, especially in the United States. Miles per hour is the unit used for speed limits on roads in the U.S., Britain and various other nations including overseas territories. Kilometre per hour (American spelling: kilometer per hour) is a unit of both speed (scalar) and velocity (vector). www.speedace.info /speed_miles_kilometers_knots_per_hour.htm   (1071 words)

 Is it possible to reach speeds greater than 100,000 miles per hour in space?   (Site not responding. Last check: ) Although 100,000 miles per hour (156,200 kilometers per hour) sounds like a rather fast speed by race car standards, it amounts to only 27 miles per second or 43 kilometers per second. Spacecraft destined for the outer planets such as Voyager and Galileo have to reach speeds of 30,000 to 40,000 miles per hour (8 - 11 miles/sec or 13 - 17 kilometers/sec), and just recently in its impact with the Jovian atmosphere, the Galileo spacecraft achieved a speed of over 100,000 miles per hour. There is no physical speed limit until we reach the speed of light at 300,000 kilometers/sec or 691 million miles per hour. www.astronomycafe.net /qadir/q415.html   (150 words)

 Mars Activities | American Museum of Natural History The globe of the Earth is nearly 8000 miles in diameter. The orbit of the Moon is 480,000 miles in diameter. Divide the distance (150 miles) by the speed (50 miles per hour). www.amnh.org /rose/mars/mathact.php?hint=5&showhint=6a   (606 words)

 Karl's Calculus Tutor - Box 2.0: Rates So when the rate of the care is, say, 60 miles per hour, that means miles traveled divided by the hours it took to travel those miles is going to be 60. Likewise, if you divide miles by miles per hour, you expect the answer to be in hours. If you do units conversion using this method of multiplying by something that is identical to the number 1, but is a fraction with the new units on top and the equivalent value of the old units on the bottom, the old units will always cancel, and you'll always get the right answer. www.karlscalculus.org /l2_0.html   (1481 words)

 miles per hour   (Site not responding. Last check: ) A torpedo is a missile sent underwater from a ship to destroy another ship and the speed is probably not too high - maybe 100 mph or so. A tornado (which I think is the same thing as a "twister") can have internal wind speeds of up to 300 miles per hour (from vague recollections, not from an authoritative source), but they move along the ground much slower - maybe 50 mph or so? Hurricanes are much bigger, but their wind speeds max out at around 130 mph I think. www.newton.dep.anl.gov /askasci/phy99/phy99291.htm   (164 words)

 Mount Washington Observatory – The Story of the World Record Wind During a wild April storm in 1934, a wind gust of 231 miles per hour (372 kilometers per hour) pushed across the summit of Mount Washington. It is incredibly difficult and dangerous to climb atop a building in winds greater than 180 miles per hour, all to be sure an anemometer is free from rime. The fact that the 1934 Observatory crew could accurately measure a wind of this magnitude, during a period of very heavy glaze icing, is a tribute to their planning and engineering acumen, as well as to their commitment to establishing and maintaining this remote scientific outpost. www.mountwashington.org /about/visitor/recordwind.php   (1884 words)

 Stanford SOLAR Center -- Ask A Solar Physicist FAQs - Answer   (Site not responding. Last check: ) The Sun is moving towards Lambda Herculis at 20 kilometers per second or 12 miles per second. Or in units "per hour": 72,000 kilometers per hour or 45,000 miles per hour. Using speed measurements of the gas at different distances from the Galactic center, the Sun appears to be cruising along at 200 kilometers per second and it takes 240 million years to complete the grand circuit around the Galaxy. solar-center.stanford.edu /FAQ/Qsolsysspeed.html   (421 words)

 Miles Per Hour :: Campaign Information The aim of Miles per Hour is to have a visible campaign of travelers down to Melbourne. Media Stunt during the morning: During the morning, participants of Miles per Hour will do a media stunt, involving a big photo at Waterfront Docklands, as a curtain raiser for all the action in the coming two days. Media Stunt during the day: During the day, participants of Miles per Hour will do a media stunt, involving a big photo in a central place in Melbourne, possibly aligned with other big public displays being organised for the Generation2015 concert. www.theoaktree.org /milesperhour/infoscreen.html   (937 words)

 Paradox Unbound: 3 Miles Per Hour According to Demographia, a Web Site run by libertarian Wendell Cox, in 1998 population density in the region was 3,416 people per square mile, far short of the City-wide population density of 7,975 people per square mile. If people endure 20 mile commutes in order to cling to rent-controlled apartments, they probably work outside the City (even people who live in Rampart are much closer to Century City than that). The commuter hours need to be expanded on the additional right hand lane (say on Sunset, for example) so it's not just 7 AM to 9 AM but 6 AM to 10 AM and later in the afternoons as well. www.mitchglaser.com /journal/2006/08/3-miles-per-hour.html   (3353 words)

 Math Forum: Ask Dr. Math FAQ: Distance, Rate, and Time For instance, if the rate the problem gives is in miles per hour (mph), then the time needs to be in hours, and the distance in miles. In a river where the current is 5 kilometers per hour, it takes her 4 hours longer to row a given distance upstream than to travel the same distance downstream. Her speed relative to the shore will only be 5 kilometers per hour because the force of the current, which is flowing at 5 kilometers/hour, slows her rate by mathforum.org /dr.math/faq/faq.distance.html   (1065 words)

 NOT YOUR GRANDPA'S SHOOTIN' IRON: Rail Guns Tests conducted at the University of Canberra were able to accelerate a 16-gram projectile down a 5 meter barrel at 250,000 gravities, for a muzzle velocity of 5,900 meters per second. Loosely translated, that's an acceleration from 0 to 13,000 miles per hour in the span of 0.2 seconds, not bad even for Superman. The fact that rail guns and directed-energy weapons do not require powders or explosives will free magazine space for strike and other mission areas (the trade-off is that surface ships will need to generate massive amounts of electric power to support them). www.military.com /soldiertech/0,14632,Soldiertech_RailGuns,,00.html   (1603 words)

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