Jonathan is to walk across a high wire strung horizontally between 2 buildings 10.0 m apart...?
109486
This is an Static problem:\nThe forces in the wire are:\nIn the middle of the rope the mass of Jonathan: 50kg.\nRigth side: T1\nLeft side: T2\n\nThis is a Vectorial equation: T1+T2=mg\n\nSince Johnatan is in the middle of the wire T1=T2... \n2*T1=mg\nT1 has two components T1x and T1y (horizontal and vertical)\nThe vertical component of T1 is the one that act against weight.\nT1y=T1*Sin(10)\nThen:\n2*T1*Sin(10)=mg\n[using mks system g=9.8m/s^2]\nT1=mg/[2*Sin(10)]\nT1=50*9.8/[2*Sin(10)]\nT1= 1410 Newtons.\nThe tension at "this point" is 2T1 =2820 N.\nHope it helps
499307
Looks like you have a Wheatstone bridge. Why don't you try Wikipedia.\n\nhttp://en.wikipedia.org/wiki/Wheatstone_bridge
324760
It probably passed within a mile laterally and 1-2 miles vertically.
222766
It is magnetic coupling between two circuits
1108611
east/west.\n\nto remember, longitutde has lines that are all as "long" as each other (one pole to the other.)
930279
Twice as long as it is from one to the middle!  How did I do?  This is the correct answer by the way.
340659
because there is a mile between each S
602615
You shouldn't have many problems as they are a fair distance away. In the area surrounding overhead lines (and also radio towers, in particular mast antennas) it is dangerous to risk interference; e.g. flying kites or chain balloons, using ladders or operating machinery. However, you would have to be a lot closer than you are in order for there to be a problem. While there are claims that it causes problems, they are simply claims.
1098203
the location can only be traingulated when brodcasting between two cellphone towers.\n\nthe phone must be in use to do this.
756382
The resolution vector of the two attached cables has to equal the opposite of the traffic light's downward vector of 980N.  Draw the two vectors head to tail.  They will make a 70 degree angle. Depending on which vector you move, the angle at the top where the resultant starts will be 50 or 40, and at the bottom will be 60 or 30 degrees.  Use the Law of Sines to find the magnitude (tension) of each vector (cable).  \n\nsin 70 / 980 = sin 50 / x where x is the cable at 30 degrees; x = 798.9N\n\nsin 70/980 = sin 60 / y where y is 40 degree cable:\nx = 903.2 N\n\nIs that what you got?
791684
Greenfoot Level Crossing.
115436
With a Magnetometer. See below for more detail.
453681
Try to ask mor clearlly at http://skyscrapercity.com/archive/index.php/t-160977-p-4.html
225165
The first thing that you really need to pay attention to is the dynamics of the wire itself and not the physical size.  Your statement is very bias as I could say that why do fiber optic lines tranmit so quickly and the wire holding up the golden gate bridge is not quicker???\nThe quickest and best answer unless you have degrees in physics is the density of the fibers.  It all comes down to density and a mirid of other factors, but density is the key my friend.\n\nHappy conducting my fiber friend!
1137609
there is insulation on the wire...........
938971
You can use wireless bridges, which with the right antennas have a range of up to 25 miles if you have an unobstructed line of sight.  Somewhere in the middle, you'll want to find someone who owns a tall object (radio stations, cell phone companies, billboard companies) which you can see right to from both offices, and is willing to let you mount a bridge up there.  \n\nSo, you'd have one wireless bridge on the roof at the first office, with a powerful antenna pointed straight at a wireless bridge on a tower several miles away.  It'll have one antenna pointed at your first office, and one pointed at your second office.  At your second office, you'll also have a powerful antenna, and it'll also need to be pointed straight at the bridge in the middle.  \n\nYou'll be able to get a much faster connection than you could with VPN over ordinary internet connections.  Most office internet connections have bandwidth of 1-3Mbps total, which would have to carry your VPN traffic and your regular internet traffic (email, websites, ect).  With wireless, you could easily have a huge 11Mbps pipe.  By the way, for the distances you're dealing with, I'd expect about $8000 worth of equipment.  Some companies flat out buy it, some spread it out over two year payments.    \n\nCity people won't always bother doing wireless, but I've talked to people with offices in the middle of nowhere, who loved their  bridges.  Some organizations also find it quite a bit more cost effective than buying internet access at each location.  \n\nMost companies will do VPN instead of buying wireless bridges. You'll need an internet connection at both offices.  If you have an office firewall, it probably has VPN functions.  For a very simple, reliable setup, get a good firewall/vpn box at each location, and just connect them, as a site to site VPN.  \n\nA 1300 series wireless bridge:\nhttp://www.cisco.com/en/US/products/ps5861/index.html\n\nA couple of good firewalls (Cisco's classic Pix, and their new ASA):\nhttp://www.cisco.com/en/US/products/hw/vpndevc/ps2030/index.html\nhttp://www.cisco.com/en/US/products/ps6120/index.html
619476
Only the Electric Power Company can answer this.\n\nAssuming your inforrmation is correct, and this involves RAIN only, not high wind, it is possible there is an Underground Line that shorts out.\n\nWhatever it is, it sounds like something that can be fixed, but this will only happen if you organize the members of the community and invite the Power Company representative to meet with them and explain why this happens.\n\nMake sure the TV News crews are there.