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In parabola, the cables of a horizontal suspension bridge are supported by two towers 120 feet apart and 40 feet high. if the cable is 10 feet above the floor of the bridge at the center. find the equation of the parabola using the midpoint of the bridge as the origin. note: a suspension bridge cable hangs in a parabolic arc if the weight is distributed uniformly along a horizontal.

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  • kakima May 11, 2010

    And what does your homework have to do with a MP3 player?

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How many linear feet converts to 1200 sq ft


Length X width = square feet. So 10 feet x 120 feet = 1200 sq ft.
But so does 40 feet x 30 feet.

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Derek is deep-sea diving with two friends. Candice is floating on the surface 42 feet above Derek, and Vincent is exploring a coral reef 40 feet in front of Derek. How far apart are Candice and Vincent?


58 feet apart. Solution: Pythagorean formula for right triangle will give you the answer quite readily. Square root of the sum of 42 squared and 40 squared.

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I SET UP RAUTER AND WORKS JUST FINE CLOSE TO THE MODEM BUT AS SOON AS I CONNECT THIS 120 FEET, IT DOES NOT WORK AT ALL. THANKS


This has happened to me many times. There are a few ways to get around this.
120 Feet is well within the range of the device. However that range is affected by a wide range of factors.
  • Walls - The signal will have a hard time penetrating some types of construction (e.g. Concrete, Lathe and Plaster)
  • Obstructions - Other things can also block the signal. Freezers, speakers, electronics, extensive wiring.
  • Environment - Some areas are more or less wireless dead zones. Nearby airports, radio antenna or other broadcasting equipment can interfere with the wireless signal.
If your 120 feet include 8 lathe and plaster walls, with a ham radio and a walk in freezer; you want to just get a nice long cable instead of proceeding with my further advice. However if there are only a couple of drywall walls and no blockages proceed.
  1. Try adjusting the location of the router. Often just moving the router to a high shelf or over a few feet can solve this type of issue.
  2. Can you connect at any range between close and 120 feet? Some testing could help identify the source of your signal loss.
  3. Try to build an antenna?

  4. Get a cable
At home I use a cable even though I'm mere feet away from my wireless router. I play online games and the wireless signal regularly experiences fluctuations in connectivity. This represents just how delicate the wireless connection really is. Imagine the invisible waves trying to penetrate your 120 feet and look for anything that might obstruct.

Mar 07, 2011 | Linksys WRT54GP2A-AT Router (WRT54GP2AAT)

1 Answer

I want to connect a single phase 24 amp kiln under my waterproved pergola. What electrical work needs to be done and how much would it cost approxmatly?


That kiln requires a 30 amp circuit, minimum. 24 amps x 125%= 30 amps per National Electric Code (NEC).

Without more info, I'll need to make a few assumptions. For the sake of estimating the cost I'll present the following scenario:

1...The distance from your electric panel to the pergola is approximately 100 feet.

2...The circuit will be underground. I'll assume that you will be able to hire someone to dig an 18 inch deep trench from the electric panel to the pergoda for $10 hr. While this should only take 3 or 4 hrs, depending on soil conditions, it could take all day. So I'll assume $80 for this.

3...This will be a 240 volt, 30 amp circuit (see why below).

4...Since you posted under the Intermatic T171, and since that is a 120 volt timer, that the kiln is 120 volts.

5...Unless the pergoda is fully enclosed, NEC still requires a weatherproof installation.

For starters, I don't recommend a 120 volt kiln. Most people I've known who had a kiln always seemed to want a bigger one ;-) Again, I'll do the estimate for a 240 volt, 30 amp kiln, as the price difference compared to a 120 volt circuit is about the same.

Also, I strongly recommend using 3/4 inch PVC conduit as opposed to 1/2 inch PVC or UF (direct burial) cable. 3/4 inch conduit doesn't cost much more than 1/2 conduit and will allow you to install wire up to #6. UF cable, in my opinion, is out of the question because if you ever decide that you want a larger kiln the direct buried UF cable is _not_ easily replaceable. A conduit and wire installation is about the same price as UF anyway.

Here's the breakdown (US dollars):

$ 10 - 30 amp, 2-pole circuit breaker
120 - 300 feet of #10 THWN COPPER wire (40 cents a foot)
20 - 1 bundle (100 feet) 3/4 inch PVC conduit
10 - 3/4 inch PVC elbows, fittings, straps
20 - Weatherproof box and weatherproof cover
+15 - 30 amp receptacle
______
$195
+100 - 2 hrs labor @ $50 hr. (possibly 3 hrs.)
______
$295
+80 - labor for trench
______
$375
+140 - Intermatic T172R (weatherproof) 240 volt timer
______
$515

Other considerations are that, if indeed, the circuit is 100 feet, you should consider using a #8 THWN COPPER wire to account for voltage drop (add $60, @ 60 cents a foot) Using a #10 wire at that distance may not allow the kiln to get to the desired temperature.

If you are anticipating things like lights, 120 volt receptacles, fans and such, the best way to do all that is to install a subpanel at the pergoda.

That should get you in the ball park as far as price. Of course, you can make adjustments accordingly. Remember that prices can vary greatly depending upon geographic location. Also, if you call a contractor for an estimate, _after_ they give you the price, _then_ ask how much they will knock off if you dig the trench.

A contractor price of $600 would not be unreasonable.

Hope this helps.






Jun 02, 2010 | Electric Intermatic T171 24 HOURS 40 AMPS...

1 Answer

Dell lime green subwoofer cable 5G068 for an older Dell Dimension deck top tower. I lost it when moving and need a replacment


all you need to do is run over to radio shack or best buy, and purchase a 3.5mm to 3.5mm male to male cable, about 6-10 feet should be plenty

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Long story, short version. New 16 top line camera system. Monitors in office and apartment in seperate building. All components and wires are new. When running appliances or even turning light switches on...


Chances are your installer used different power sources within your building to provide power to the cameras. If electric power is being supplied through multiple circuits (different breakers) this can cause sync problems and interference. The first thing I would try is to put all the cameras on the same power supply. A DC power supply is best if your cameras accept DC voltage. The second thing is to check how close all camera coaxial cables are running near high voltage lines (120/240 VAC). Eventhough coaxial cable is shielded you can induce voltage bleed over from electrical lines into your video, which will appear as interference lines on your monitor. Cables should be at least 2 feet away from electrical lines. If both wires run together parallel for more than 10 feet then you need to cross over the electrical line at a right angle every 10 feet. This will help eliminate interference.

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1 Answer

Power acoustik gothic OV2 800 manual


Could not get a manual for you but did get the follwing specs. Hope they help.

Power Acoustik Ov2-800 2-Channel Class A/B Gothic Series Amplifier (800-Watt)
POWER ACOUSTIK OV2-800 2-CHANNEL CLASS A/B GOTHIC SERIES AMPLIFIER

800-WATT 2-CHANNEL
4 ohm RMS: 150W X 2
2 ohm RMS: 180W X 2
Bridged mode MONO RMS: 360W
BRIDGED MAX: 800W
FULL MOSFET POWER SUPPLY
PWM CIRCUITRY
FULL SELECTABLE CROSSOVER
3-WAY PROTECTION CIRCUIT
TRI-MODE CAPABLE
VARIABLE LOW PASS 40 HZ - 120 HZ
VARIABLE HIGH PASS 150 HZ - 1.5 KHZ
VARIABLE 18 DB BASS BOOST @ 40 HZ
FREQ RESP: 10 HZ TO 30 KHZ
S/N RATIO: 98 DB
THD: 0.02%
2 ohm STABLE STEREO
SYSTEM DISTRESS INDICATOR
HIGH/LOW LEVEL INPUTS WITH FLOATING GROUND
4-GAUGE POWER/GROUND CONNECTION
PLATINUM RCA CONNECTORS
LINE OUTPUT WITH FLOATING GROUND

BLUE LED
CHROME TOP PLATE PANEL 2-CHANNEL CLASS A/B GOTHIC SERIES AMPLIFIER (800-WATT)

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No signal or intermitant signal


Sounds like cable or satellite are your only options unless after the switch they bump up the power.

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1 Answer

Hp pavillion desktop will not power up. Blinking green light at power supply


Step 1 : Turn off the system by pressing the power button for 5 - 10 sec until the power LED is off. Removed all cables including the power cable (Exclude monitor cable and KeyBoard/Mouse).

Step 2 : Press power button for 5-10 sec again to drain fela power.

Step 3 : Reconnect the power cable at the back of the tower/computer and power on the system.

**If the same problem exists, Call HP tech Support (800-474-6836) because there is a high possibility that you have a bad Motherboard or Power Supply on the system.

Oct 28, 2008 | HP Computers & Internet

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