Posts Tagged ‘force 12 flagpole antenna’
FlagPole Antenna
September 4th, 2010 | 
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FlagPole Antenna
How do i do these math problems.?
If a flagpole 24 feet tall casts a shadow that is 32 feet long, find the length of the shadow cast by an antenna which is 42 feet tall. Round to the nearest tenth if necessary
DO I MULTIPLY THE FLAG"S SHADOW BY THE FLAGPOLE"S HEIGHT OR BY THE ANTENNA?
If a tree 27.5 feet tall casts a shadow that is 11 feet long, find the height of a tree casting a shadow that is 13 feet long. Round to the nearest tenth if necessary.
A fire fighter needs to estimate the height of a burning building. She estimates the length of her shadow to be 7 1/2 feet long and the length of the building's shadow to be 84 feet long. Find the height of the building if the fire fighter is 5 feet tall
Use porportions.
24 42
___ = ___
32 X
so now you can cross multiply. 24x=1334
x=56 The shadow is 56 feet.
Same thing for this problem.
27.5 X
____ = ___
11ft 13ft shadow
357.5=11x
x=32.5 The height is 32.5 ft.
I hoped i answered you question. Just set up the equation and cross multiply (or whatever suits you) and solve for the variable. ( try to understand my porportion, i know they don't look right but i couln't fix it. The X is the variable and those numbers are seperate.)
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Posted in Americanflag | 
Tags: antenna, antenna_mast, flag, flag pole antenna, flagpole antenna, force 12 flagpole antenna, hf flagpole antenna, pole,, telescoping, zero five flagpole antenna | 
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Force 12 FlagPole
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Force 12 FlagPole
2 questions for Statics class.. can someone help? (if you can handle it)?
A rope is tied to the top of a 10 m flagpole, the rope is tensioned to 120 N, then tied to straight stick in ground 20m from bottom of pole. The ground is level. Find the vertical and horizontal component of force applied at the top of the flagpole.
ALSO
The howv roof truss shown is subjected to wind loads as shown. Wind loads are perpendicular to inclined cords. Resolve each force into vertical and horizontal components.
The wind loads are 2, 4, 2 kilo lbs. And its 12 in. tall and 48 in. across.
The first question is all about trigonometry.
First, find the angle of the 120N force relative to the flagpole:
arctan(20/10) = 63.435deg
So, the horizontal force component is:
120N * sin(63.435deg) = 107.3N
and the vertical force component is:
120N * cos(63.435deg) = 53.7N
The second question is impossible to solve without more information. A diagram is really needed here....
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2 questions for Statics class.. can someone help? (if you can handle it)?
A rope is tied to the top of a 10 m flagpole, the rope is tensioned to 120 N, then tied to straight stick in ground 20m from bottom of pole. The ground is level. Find the vertical and horizontal component of force applied at the top of the flagpole.
ALSO
The howv roof truss shown is subjected to wind loads as shown. Wind loads are perpendicular to inclined cords. Resolve each force into vertical and horizontal components.
The wind loads are 2, 4, 2 kilo lbs. And its 12 in. tall and 48 in. across.
For the first question, you can determine the angle the rope makes with the ground (10m high and 20m from the pole). That gives you an angle of roughly 26.57 deg. (or however you want to express it). The rope is pulling both vertically and horizontally on the pole, with a total tension of 120N. So, the vertical component is 120 sin 26.57 and the horizontal component is 120 cos 26.57 You'll see that the horizontal component is twice the vertical component, just the same as the distance from the pole is twice the height.
As for the second question, I am having a hard time picturing exactly what is going on (and it will make it more difficult to explain). I'm assuming the total width of the truss is 48, so you essentially have two 12x24 triangles, with the chords being the hypotenuse of the triangle. Using that assumption, your force is perpendicular to the chord. Try to picture two right triangles on the chord. One is the applied force, half the chord and the horizontal component. The other is the force, half the chord and the vertical component. From the geometry of the chord, you can determine the angle the horizontal and vertical components make with the chord itself. Then you need to solve those two triangles I just described. For one, theforce relationship is F=Fh*sin26.57 and for the other it is F=Fv*sin63.43.
Hope this helps.
Posted in American Flag Eagle |
Tags: amateur radio, antennas, flagpole, force 12 flagpole, force 12 flagpole antenna |
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12 FlagPole
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12 FlagPole
can you help me on this trig question?
At 3 P.M. the flagpole in front of your school casts a 12-foot shadow. The sun's angle of elevation is 58degrees19'. How tall is the flagpole?
It is 19.44 feet tall.
The only trick to this one is realizing which angle in the triangle is the given angle. Since it is an angle of elevation, it is the angle opposite the flagpole in a diagram of the sun, the flagpole, and the ground.
So, if you take the tangent of this angle, it equals its opposite side (the flagpole) divided by its adjacent side (the ground from flagpole to the end of the shadow). Therefore, the height of the flagpole equals the shadow length times the tangent of the given angle.
That is 19.44 feet.
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12 Gold Ball Flagpole Ornament $134 Our 12" gold ball flagpole ornaments are constructed of brushed, gold-finish aluminum. Mounted on a ½" spindle, this ornament should fit most flagpole trucks. Ball's diameter should match the butt diameter of your flagpole. |
|
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Flagpole Sitter $24.99 Flagpole Sitter Photographic Print by H. Armstrong Roberts. Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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Medium Flagpole Eagle - Pewter $68.67 Dimensions: 12"W x 12"H Mounting: Flagpole Packaged Weight: 3 lbs. Size/Dimensions: Not Available ColorMapping: White |
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Gold Eagle Flagpole Ornament - 12 Wingspan $61.5 Our gold eagle flagpole ornament is made of anodized aluminum and features a 12" wingspan. Mounted on a ½" spindle, this flagpole ornament should fit most trucks. Recommended for use with flagpoles 25' in height. Mounting screws included. |
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Flag and Flagpole at the Beginning of an Overpass $24.99 Flag and Flagpole at the Beginning of an Overpass Photographic Print by A. Villani. Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
|
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Medium Flagpole Eagle in Color $64.59 Designed in true color, this Medium Flagpole Eagle by Whitehall™ is the best way to show your patriotic side. As this majestic eagle is a symbol of patriotism, it will soar high atop your flagpole for all to see that you are proud to be an American. This colorful ornament will give your home a custom and genuine look. Designed to fit poles 16 to 24 feet tall, this large flagpole ornament adds the special touch your American flag deserves. Features: • Finished with weather resistant paint • Rooftop mounting • Adjustable roof mount base included • True color finishOrnament Size: 12"tall x 12"wide Recommended for poles 16' to 24' tall |
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Silver Anodized Eagle Flagpole Ornament - 12 Wingspan $58 Our silver anodized eagle flagpole ornament features a 12" wingspan and is mounted on a 1/2"; spindle. This eagle ornament is recommended for 25' tall flagpoles. |
|
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Flagpole Sitter With Paint Bucket $24.99 Flagpole Sitter With Paint Bucket Photographic Print by H. Armstrong Roberts. Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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Free Shipping. Sunsetter 12" Gold Eagle For Flagpole $70.99 Add a touch of elegance and patriotism to your flagpole with this 12" gold eagle top. Replace the existing ball that came with your flagpole with this beautiful and unique eagle topper. This flagpole topper is perfect for any size flagpole. Steel construction. This item ships directly from the manufacturer. Product usually arrives in 14-21 business days, depending on destination, including order processing and shipping. APO/FPO shipping unavailable |
|
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View Looking Directly up a Flagpole $39.99 View Looking Directly up a Flagpole Photographic Print by Stephen St. John. Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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American Flag Waving on a Desert Flagpole $39.99 American Flag Waving on a Desert Flagpole Photographic Print by Pete Ryan. Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
|
|
An American and Russian Flag Held on the Same Flagpole $69.99 An American and Russian Flag Held on the Same Flagpole Photographic Print by . Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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US Navy E Pennant at the Top of a Flagpole $69.99 US Navy E Pennant at the Top of a Flagpole Photographic Print by . Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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Nelson Bracken Holding Written Authorization for Lights on Flagpole $69.99 Nelson Bracken Holding Written Authorization for Lights on Flagpole Photographic Print by . Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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Gilding the Eagle or Painting the Flagpole, May 26,1928 $39.99 "Gilding the Eagle" or "Painting the Flagpole", May 26,1928 Giclee Print by Norman Rockwell. Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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Kingston, New York - View of Flagpole at Academy Park $19.99 Kingston, New York - View of Flagpole at Academy Park Premium Poster by . Product size approximately 12 x 16 inches. Available at Art.com. Embrace your Space - your source for high quality fine art posters and prints. |
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Posted in American Flag Eagle |
Tags: 12 flagpole, amateur radio, antennas, flagpole, force 12 flagpole, force 12 flagpole antenna, video, vimeo |
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