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Very Useful

Why are hydrogen fuel cell very useful as a source of energy in a space mission application? What other ways ?
i need a few opinions on this .... thax
Hydrogen fuel cells are sometimes a good choice for space missions.
1) produce power
2) produce heat
3) produce water
4) are not radioactive
Hydrogen and oxygen are not all that easy to store for long periods.
Solar panels are generally a better bet for the inner solar system, nuclear generators for the outer solar system.
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TIRE GAUGE SET OF 3 SLIME DUAL HEAD PENCIL!! VERY USEFUL!! | ![]() |
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US $14.99 | 33m |
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Apple Pie Recipe Plate Decorative Plate Very Useful for Baking Cute for Kitchen | ![]() |
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US $4.99 | 7h 32m |
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Pack and Explore Bag ( Brand New ) Very useful for camping, vacations, sports | ![]() |
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"Basic Model Railroad Benchwork" by Model Railroader Books, Very Useful | ![]() |
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Very vividly useful bronze kylin Lock & Key collect | ![]() |
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Pentax K20D - Sales Brochure - rare & very useful, MINT condition | ![]() |
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Pentax K5 K-5 - Sales Brochure - rare & very useful, MINT condition | ![]() |
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pack of 2 small food covers white very useful Brand New keep the flies off food | ![]() |
0 Bid | US $3.14 | 23h 20m |
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Free Shipping!The 200pcs very useful silver_plate Scalp 40 mm | ![]() |
0 Bid | US $.99 | 1d 19m |
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Telephone Cables Can be Very Useful to the Aviator $49.99 Joaquin Xaudaro Telephone Cables Can be Very Useful to the Aviator - Giclee Print |
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This Very Useful Little Work $38.02 No Synopsis Available |
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Craftsman Stands at His Workbench Plying His Useful Trade and No Doubt Doing It Very Well $49.99 Craftsman Stands at His Workbench Plying His Useful Trade and No Doubt Doing It Very Well - Giclee Print |
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5 Very Good Reasons to Punch a Dolphin in the Mouth (And Other Useful Guides) $10.96 No Synopsis Available |
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Useful Knots by Budworth, Geoffrey [Paperback] $14.26 Whether on water, land, or suspended in midair, many popular outdoor sports that encounter the elements require a knot for its reliability, strength, or ease of use. Geoffrey Budworths book, Useful Knots, is an excellent resource for anglers, climbers, sailors, campers, and general projects done around the home. Topics range from a brief history of rope materials, how to distinguish a knot from a hitch or a bend, tips and techniques for each knots construction and how to avoid fraying, and many more. Specific knots featured include the double overhand knot, pole hitch, Albright knot, Zeppelin bend, buntline hitch, cow hitch variation, Worlds Fair knot, bowline, cats paw, Jansik special, and the Alpine butterfly, among many others. With easytofollow diagrams and clear guidelines as to which knot is best suited for a certain activity, Useful Knots is a very handy reference. Author: Budworth, Geoffrey Binding Type: Paperback Number of Pages: 96 Publication Date: 2005/02/01 Language: English Dimensions: 8.24 x 6.24 x 0.34 inches |
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Useful $18.67 No Synopsis Available |
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Useful Miscellanies, Part 1 (1712) $33.24 Due to the very old age and scarcity of this book, many of the pages may be hard to read due to the blurring of the original text. Author: King, William Binding Type: Hardcover Number of Pages: 44 Publication Date: 2010/05/23 Language: English Dimensions: 8.50 x 11.02 x 0.18 inches |
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A History of Useful Arts and Manufactures (1822) $28.2 Due to the very old age and scarcity of this book, many of the pages may be hard to read due to the blurring of the original text. Author: A. ONeil Publisher Binding Type: Paperback Number of Pages: 180 Publication Date: 2010/09/10 Language: English Dimensions: 6.00 x 9.02 x 0.38 inches |
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Useful Pig $14.98 Useful Pig |
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A Useful Life $13.99 A Useful Life |
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The Useful Motor $19.99 The Useful Motor - Premium Poster |
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Very $7.49 Very |
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Barker Creek LL304R Very Very Vocabulary 2 $25.35 Book Two in our topselling Very Very Vocabulary series follows the same format as Book One offering an additional 104 pages packed with great word detective challenges. Imagine the writing activities that learning words like cornet haiku tsunami and souvenir will spark. Grab your dictionary and explore these and other fun and useful words with Very Very Vocabulary Book 2 The two books in this series provide a fun and easy way for children to learn new words and to use them in everyday conversation. NonEnglish speakers (E.S.L) will also benefit from these fun vocabulary building activities plus they will be using various dictionary skills Included are 72 word activity pages along with a blank template so you may add more of your own words. Reproducible for classroom use. |
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Barker Creek LL301R Very Very Vocabulary 1 $25.35 The 104 pages in the book are packed with useful tools that will help your students learn new words a gift that will stay with them for the rest of their lives. Reproducible activity sheets for 72 interesting and useful words are included that ask your students to write define discuss create a sentence and illustrate each word. Teaching tips a master word list practice test and clippable illustrations and words for making flashcards are also included. NonEnglish speakers (E.S.L) will also benefit from these fun vocabulary building activities plus they will be using various dictionary skills |
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The Young Man's Best Companion, Or, Mathematical Compendium: Containing a Great Variety of Very Useful Rules and Examples in Mathematics for the Merchant, Clerk $18.52 No Synopsis Available |
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TF2 Engineers: Very Useful Scientific Facts
This type of map projection is very useful for seas travel and appears as a " a piece of paper that is wrapped?
This type of map projection is very useful for seas travel and appears as a " a piece of paper that is wrapped around a globe" pllzz hellp what the heck is the answer to this??
Cylindrical projection. See http://en.wikipedia.org/wiki/Cylindrical_projection#Cylindrical

January 12th, 2010
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“very useful talent toi have” has never been more appropriate
It is called side-stepping the issue at hand because they disdain to answer and feel asif the person confronting them is their inferior. I took three years of psychology in order to understand an ex-husband. I am by no means an expert, except through the halls of life.