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The billion dollar questions!?
Help. My book is stupid. I don’t understand it.
P13. The U.S. Weather Bureau defines a cloud ceiling as the altitude of the lowest clouds that cover more than half the sky. To determine a cloud ceiling, a powerful searchlight projects a circle of light vertically on the bottom of the cloud. An observer sights the circle of light in the crosshairs of a tube called a clinometer. A pendant hanging vertically from the tube and resting on a protractor gives the angle of elevation. Find the cloud ceiling if the searchlight is located 1000 feet from the observer and the angle of elevation is 30.0° as measured with a clinometer at eye-height 6 feet. (Assume three significant digits.)
P14. A video camera is to be mounted on a bank wall so as to have a good view of the head teller. Find the angle of depression that the lens should make with the horizontal.
y of the triangle = 5.93
x of the triangle = 12.02 ft
head teller is point A
Just simple goemetry. Get a blank piece of paper. Draw a cloud. Under the cloud (straight down) draw the searchlight on the ground. shining straight up. Far away, also on the ground, draw a guy looking up at the cloud.
Now – the distance between the guy and the light is 1000 feet. The angle he’s looking up at is 30 degrees from horizontal. Draw a right triangle from the guy’s eye, horizontally to the light, up to the cloud, back to the eye. Write 30 degrees on the angle next to the guy.
Then forget all about the guy and the cloud and just do the math based on the triangle.
Don’t forget to add 6 feet to your answer when it’s finished, so that you’re measuring from the ground and not from the guy’s eye.
Tube Implosions – Flameworking Demo
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27.83CT CARVED NATURAL NO HEAT AQUA PLATINUM TUBE DIAMOND .70CT F, VS PENDANT $4,995.00 |
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BEZEL SET TUBE SLIDE DIAMOND .86ct G, SI2 14K YELLOW GOLD 18 INCH PENDANT $2,815.00 |
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ESTATE ITALY DOMED 7 DIAMOND TUBE SET 14K YELLOW GOLD 3MM OMEGA CHAIN PENDANT $2,348.00 |
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.30CT 18K WHITE GOLD 30 TUBE SET FULL DIAMOND OVAL PENDANT 18 OR 20 INCH CHAIN $1,195.00 |
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14K Victorian Cameo Pin Pendant Seed Pearl Hand Painted Lever Catch Tube Hinge $994.95 |
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1 of 3 DORIA Pendant Glass Tube Crystal CHANDELIER Germany 60s $900.00 |
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Tube Cross Pendant 14k Yellow Gold White Gold Charm Fashion 2.50 inch $795.00 |
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0.25CT BRILLIANT TUBE SET ROUND DIAMOND 14K WHITE GOLD 16 INCH CHAIN PENDANT $735.00 |
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LBL Lighting Three Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $692.00 |
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LBL Lighting Three Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $680.00 |
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LBL Lighting Tube Three Light Pendant in Black HS2933FRBL1B35MPT $680.00 |
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John Hardy 18K 925 Diamond Pave Station Tube Enhancer Pendant w/box $659.00 |
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LBL Lighting Three Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $608.00 |
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LBL Lighting Three Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $608.00 |
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LBL Lighting Three Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $596.00 |
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LBL Lighting Three Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $596.00 |
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14k Yellow Two Tone Gold Cross Tube Pendant Charm Large $588.00 |
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925 Sterling Silver Ram Aries Goat Pendant Gold Toothpick Holder Tube Horoscope $514.99 |
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LBL Lighting Two Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $496.00 |
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SQUARE TUBE ITALIAN 14K WHITE GOLD CRUCIFIX PENDANT $495.00 |
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LADIES 21K SOLID YELLOW GOLD TUBE PENDANT WOMENS ESTATE PENDANT J184156 $494.99 |
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Sterling Silver Skull Holder Tube Pendant 18 Karat Yellow Gold Toothpick Jewelry $469.99 |
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LBL Lighting Two Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $484.00 |
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LBL Lighting Tube Two Light Pendant in Black HS2932FRBL1B35MPT $484.00 |
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41mm Hawaiian Pierced 14k Yellow Gold Queen Emma Curved Tube Slide Pendant $475.00 |
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Large square tube 14kt white gold cross pendant charm $470.00 |
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Sterling Silver Tube Holder Pendant 18K Gold Toothpick $444.99 |
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LBL Lighting Two Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $452.00 |
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LBL Lighting Two Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $452.00 |
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LBL Lighting Two Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $440.00 |
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LBL Lighting Two Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $440.00 |
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mid century glas tube ceiling pendant light vintage $389.00 |
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CHINA ANTIQUE SILVER 19th:rare!PENDANT:JAR,hidden Tube $420.00 |
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Tahiti Large Welded Tubes Pendant Lamp / Ceiling Light $429.00 |
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3PCs Modern Design Pressed Glass Lens/ Bowl/ Tube Pendant Lamp Ceiling Lighting $279.00 |
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LALIQUE Mossi Tube Pendant Pendent Necklace Crystal $395.00 |
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Jewelryweb 14K Gold Yellow Square Tube Loveknot Pendant RCP197506Y $386.10 |
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7mm Hawaiian 14k Yellow Kuuipo Rotating Tube Pendant $375.00 |
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Square tube 14kt white gold cross pendant charm $380.00 |
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LBL Lighting Pavia Pendant Amber Bronze A19 E26 LF489AMBZ2D75 $372.00 |
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LBL Lighting Pavia Pendant Amber Bronze A19 E26 LF489AMBZ2D75 $372.00 |
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LBL Lighting Pavia Pendant Amber Bronze A19 E26 LF489AMBZ2D75 $372.00 |
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LBL Lighting Pavia Pendant Amber Bronze A19 E26 LF489AMBZ2D75 $372.00 |
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14K 2 TONE MESH CHAIN ROUND TUBE SET RUBY PAVE SET DIAMOND DANGLE PENDANT $370.00 |
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LBL Lighting One Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $356.00 |
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LBL Lighting Pavia Pendant Amber Bronze A19 E26 LF489AMBZ2D75 $352.00 |
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LBL Lighting Pavia Pendant Amber Bronze A19 E26 LF489AMBZ2D75 $352.00 |
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LBL Lighting Pavia Pendant Amber Bronze A19 E26 LF489AMBZ2D75 $352.00 |
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LBL Lighting Pavia Pendant Amber Bronze A19 E26 LF489AMBZ2D75 $352.00 |
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LBL Lighting One Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $344.00 |
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LBL Lighting Tube One Light Pendant in Black HS2931FRBL1B35MPT $344.00 |
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Fancy hollow tube 14kt yellow gold crucifix pendant $330.00 |
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Tube Cross Pendant 14k Yellow Gold Large Crucifix Charm $321.00 |
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LBL Lighting One Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $316.00 |
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LBL Lighting One Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $316.00 |
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Tube Cross Crucifix Pendant 14k Yellow Rose Gold Charm 2.5 inch $314.00 |
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LBL Lighting One Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $304.00 |
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LBL Lighting One Tube Mini Pendant -Fusion Track Adaptable Satin Nickel $304.00 |
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14k Yellow n Rose Gold Tube Cross Crucifix Pendant 2.5″ $302.00 |
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Tahiti Small Welded Tubes Pendant Lamp / Ceiling Light $299.00 |
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Bulbrite 134019 40W Nostalgic Edison Squirrel Cage-style Bulb $8.25 40 watt 120 volt Medium Screw (E26) Base 1910 Squirrel Cage Style Nostalgic Incandescent Bulbrite Light Bulb… |
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GE 47484 11 Watt (40 Watt equivalent) Energy Smart G25 Globe CFL 6 Year Life Light Bulb $7.01 GE, FLE9/2/G25/SW/CD, 9W Soft White Compact Fluorescent Lamp G25 Globe Shape, 5″ MOL, Medium Base, 120V, 6000 Hour, 5 Year Guarantee, 430 Lumens, 40W Equivalent, CRI = 82, Energy Star Approved, Clam Shell Pack…. |
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Hydrofarm 2-Foot Hanging Shop Light, White $31.86 These fixtures will accommodate two 2 standard fluorescent bulbs not T-5s and come complete and ready to plug into the wall…. |
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Chewable Jewels Rectangle Necklace Green $14.99 Dr. Bloom’s Chewable Jewels are the original teething jewelry created and manufactured by Dr. Helen Bloom Smith, a dentist and a loving mom. A Fashionably, unique and socially acceptable, trendy line of teething jewelry for style conscious moms and teething tots in mind…paying special attention to using product materials that are made from FDA approved food grade silicone and are Phthalate, BPA,… |
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NCAA Washington Huskies High Powered Compact Binoculars $41.55 8 x 22 Compact Binoculars. Small enough to fit on a belt loop or in a purse, yet powerful enough to see clearly from the top of the stadium. Colorful 3-D logo on the binoculars and the case Features velcro clousure on pouch and easy one hand focus capability. Two year warranty…. |
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NCAA Washington State Cougars High Powered Compact Binoculars $41.55 8 x 22 Compact Binoculars. Small enough to fit on a belt loop or in a purse, yet powerful enough to see clearly from the top of the stadium. Colorful 3-D logo on the binoculars and the case Features velcro clousure on pouch and easy one hand focus capability. Two year warranty…. |
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Kid Companion Chewable Pendant (Green) $19.95 HeartString Kid Companion Chewable Necklace. Each package includes a HeartString Kid Companion pendant along with an organic cotton lanyard with breakaway clasp. The unique break-away clasp was custom designed and tested with young children in mind. The lanyard (necklace) will release if pulled harder than 4lbs and can easily be re-attached. In addition to being safe, it is comfortable for the wea… |
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Tube 2 Track Heads Pendant LBL, Tube 2 Track Heads Pendant Borosilicate glass tubes suspended on metal rods. Fixtures overall length is field-cuttable for shorter lengths. Please consult factory for custom lengths. Includes (2) 35 watt low-voltage GY6.35 base bi-pin lamps…. |