A Street Light Is on Top of a 14 Feet Pole. a Person Who Is 6ft Tall Walks Away From the Pole at a R

Let x = distance of person from light pole s = length of shadow Given 14 = height of street light 6 = height person dx/dt = 6 ft/sec Find ds/dt. By similar triangles we have: s/6 = (x s)/14 14s = 6x 6s 8s = 6x s = (6/8)x = (3/4)x ds/dx = 3/4 ds/dt = (ds/dx)(dx/dt) = 6(3/4) = 18/4 = 9/2 ft/sec

A Street Light Is on Top of a 14 Feet Pole. a Person Who Is 6ft Tall Walks Away From the Pole at a R 1

1. do you remember back in the day you had to be home before the street light came on?

yep. nothing would happen because i listened to my parents

2. how many ampere led street light produce?

Here is the telephone NO.:8675584660522 ,call me Johnson ,I am the professor of produce Led lighting, welcome to my page ,you will like it

A Street Light Is on Top of a 14 Feet Pole. a Person Who Is 6ft Tall Walks Away From the Pole at a R 2

3. A street light is at the top of a 16 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of?

hmmmm... 4 ft/sec? i just wanna see the answers.

4. So I've got a street light right outside my appt room and it keeps me up at night.?

First step is to call someone at a local level to see if something can be done - who is responsible for public works in your city? They would be a good place to start. Get a set of blackout curtains. Until you get a chance to buy them, you can hang a blanket or towel over your window with thumb tacks for a few nights. Do not damage the light. It will just be replaced, and your problem will return - you will have to keep putting it out over and over again, increasing the likelihood of getting caught.

5. question about traffic violations caught by street light cameras?

the digicam's are located to take a image of license plates of autos that circulate throughout the time of the intersection after the easy adjustments. on account which you probably did no longer circulate throughout the time of the intersection, then your automobile grew to become into no longer in place for it to get your plate. Plus, on account which you probably did no longer circulate throughout the time of the intersection, it would not have tripped the digicam, so no image grew to become into taken.

6. A street light is 20 feet above the ground. A man 6 feet tall walks directly away from the lamp at the rate?

let x be the distance of the man from the street light , & s the length of shadow by similar triangles, s/6 = x/(20-6) s = (3/7)x rate at which shadow length increases, ds/dt = (3/7) dx/dt = (3/7)*4 = 1 5/7 ft/min

7. Why do street light always go out when I walk by?

Maybe a poltergeist

8. A person is standing 40 feet away from a street light that is 30 feet tall. How tall is he if his shadow is 10?

Use proportional triangles: 30/50 = x/10 x= 6 The dude is 6 feet tall!

9. ::will the street light of new york inspire you::?

No, to me they are just a goddamn lights because I am not hipster

10. Find the speed of the tip of a shadow reflecting off a man walking away from a street light?

This is something that you should draw to understand the details. The 11-ft tall pole, the distance from the bottom of the pole to the tip of the man's shadow, and the distance from the top of the pole to the tip of the man's shadow form a large triangle. Additionally, the man's height, the top of the man's head to the tip of his shadow, and the distance from the feet of the man to the tip of the shadow form a smaller triangle. We can use this information to find the desired answer. Indeed, since these triangles described are similar, there is proportionality at play here - we can glean the following equation from examination of the situation, where $h$ is the height of the man's shadow and $x$ is the distance from the bottom of the pole to the man's feet at any given time (thus, $xh$ is the distance from the bottom of the pole to the tip of the man's shadow - this is the base of the larger triangle), $$frac11xh=frac5.5h.$$ Now, rearrange this equation to find a linear relationship between $h$ and $x$: $,,,h=x$. Taking the derivative of both sides of this with respect to $t$, where $t$ is the time in seconds, to get $$fracdhdt=fracdxdt=3.5$$ It is important to recognize that the speed of the tip of the shadow does not depend upon the distance of the man from the pole, as we can see from the form of $dh/dt$. In other words, the speed of the tip of the shadow is constant at the rate at which the man walks away from the pole, with these dimensions, regardless of how far away he is from the pole.

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Who Invented the Street Light?
someone retarded1. which china led street light manufacturer is better?My english is poor and can not tell you too much about street light products, but I suggest you see products here WWW.IBTSLED.COM2. why does the street light in front of my house keep turning on and off every few minutes?Its the ballast. When the bulbs go out they just quit working. When the ballast starts to go bad, they heat up, shut down when it cools down again they come back on till they heat up again3. Street light goes out when I walk by?please dear, do not you call yourself 'crazy' ever, please. i do not know anything useful information to help you but i do know somethings; 1st of all whoever made fun of your question is himself/herself a jerk and i knew it & so many other people know it too that when they read your question they thought of the " power" of your's & maybe a lot of them wanted/wished that what if they had the power that you have. once i watched a show on t.v. ( not faking) that on peiple with some mysterious things/power or events. on 1 particular episode, there was a man, whenever he saws a bulb or like he went into a shop & if there's a bulb it just went off without any reason like, its just fused( suddenly & it happens every-time) and did not light again( he told that himself & demonstrated it also; he said why it happenes i do not know & that's why in my home i do not have any bulbs for lighting purpose.) so i think maybe you can find some similarities inyour & his case if you believe. otherwise i just wanna say that just believe in yourself & in the good things in yourself ( by good things i did not mean that your gift is a bad thing). do take some time from your daily schedule & do some research, it will help you to find the qualities in yourself because knowing oneself, one's mind, heart & soul is like knowing or get fascinated by a superstar ( if you can like a celebraty & his life how come you do not like your's? hope you will get it what i wanna say, right na?). who knows you would be among some very lucky people who help me & other normal people like me through their gift. thanks for reading my message to you and if you like you can share anything with me. take care.4. When you were a kid did you often break the street light rule?My Dad was a Sergeant in the Army during WW 2. Have you ever heard one of those guys yell? We made it home as soon as the lights came on. Having the entire town know you were late just was not a pleasant event.. we would hear all about it at school the following day.. Sigh.5. When you were a kid did you often break the street light rule?sometimes i stay at my friends house till like 3A.M. im 14 so yea, but one time i broke a streetlight, i shot it with my bebe gun6. what does it mean when you drive under a street light and it goes out?I had a physics teacher in High School who let us ask him random questions at the beginning of class each day. One of the students asked him this question, and his answer was that each of us emit a certain energy. If the light turns off or on, it was because your energy was at the same frequency as the electricity in the bulb. He also dedicated a day of class to ESP, and got mad at us when we threw off his vibe... and he thinks JFK was abducted by aliens, and will return in the year 2025... so, you can judge yourself whether or not to give his explanation any merit... :D7. PSE Begins Smart Street Light Installations To Help Customers Save Energy, Reduce CarbonPuget Sound Energy will begin installing street light control capabilities, also known as smart street lights, to help its lighting customers save money and reduce carbon. The technology will give PSE municipal customers more choice on how they light up their roads and communities by measuring energy consumption and using adaptive controls to lower usage in specific locations and times of day while also enhancing safety measures. The smart grid technology will add controls and software to LED street lights to enable two way communication. Smart street lights can be instantly turned on and off or dimmed for benefits like energy conservation or reducing light pollution at night. The ability to monitor each light's performance means broken and failing lights can be quickly identified and repaired. Because smart street lights can operate more efficiently, customers will be able to optimize their energy use, lower costs and reduce carbon in our environment. "Our lighting customers told us they wanted more control over their energy usage to save money and reduce carbon, and this technology will help meet both those needs," said PSE Director of Product Development and Growth Will Einstein. "New technology such as smart street lights will help us partner with our customers to meet their goals and improve the customer experience." Energy measurement that would facilitate metered billing as opposed to flat rate billing Remote control for dimming, turn off and turn on Uses less energy through dimming and reduces carbon as a result The City of Bellevue will be one of the first to receive the installations. PSE will be replacing around 300 roadway lights in some of Bellevue's arterial roadways with LED lights. It's part of the city's overall effort to reduce its carbon footprint. "We value innovation as a community and so appreciate that PSE partnered with Bellevue as one of the first two cities to receive new smart street lights," said Mayor Lynne Robinson. "In addition to energy efficiency and cost savings, it has the potential to help PSE respond more quickly to burned out lights owned by the company. It will be a positive safety boost for our Vision Zero effort to eliminate serious-injury and fatal crashes on city streets by 2030." Smart street lighting installations will also soon begin in the City of Edgewood with the installation of about 50 smart light controllers. "The City of Edgewood is excited to partner with PSE to incorporate Smart technology for immediate two-way communications and control of our street lights," said Edgewood Mayor Daryl Eidinger. "This control will give us feedback for malfunctions and allow us to reduce our usage, light pollution and our carbon footprint." Other cities within PSE's service area will also be able to engage with PSE on controls. PSE has partnered with Landis Gyr to equip 25,000 street lights with smart controls over five years. This is another way PSE is working together with customers to create a clean energy future for all as the company has also set an aspirational goal to be a Beyond Net Zero Carbon company by 2045. PSE will target reducing its own carbon emissions to net zero and go beyond by helping other sectors to enable carbon reduction across the state. Partnering with municipalities in its service area will help towards that mission. For more information on the smart street lighting program.
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