Scientific American's Ask the Experts: Answers to The Most Puzzling and Mind-Blowing Science Questions

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Harper Collins, 2009 M03 17 - 288 páginas

Why is the night sky dark? How do dolphins sleep without drowning? Why do hangovers occur? Will time travel ever be a reality? What makes a knuckleball appear to flutter? Why are craters always round?

There's only one source to turn to for the answers to the most puzzling and thought-provoking questions about the world of science: Scientific American. Writing in a fun and accessible style, an esteemed team of scientists and educators will lead you on a wild ride from the far reaches of the universe to the natural world right in your own backyard. Along the way, you'll discover solutions to some of life's quirkiest conundrums, such as why cats purr, how frogs survive winter without freezing, why snowflakes are symmetrical, and much more. Even if you haven't picked up a science book since your school days, these tantalizing Q & A's will shed new light on the world around you, inside you, below you, above you, and beyond!

 

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Crítica de los usuarios - Marcar como inadecuado

I want to know science behind this procedure-
take a metal cap(coke bottle), remove the plastic cover,
now add some wax in it,
heat the cap, until the wax melt, starts boiling & finally catchs fire
,
which lights same as candle, then stay away & trow some(5-10ml) water above the cap over the fire,
u will see the fire blasting from that 3cm size to around 1000times more
why??????
 

Contenido

Celestial Bodies
1
Heavenly Bodies
8
What is a blue moon?
13
Why and how do planets rotate?
19
Why do stars twinkle?
25
Does the fact that the universe is continually
31
The Grass Is Always Greener
35
Creepy Crawlers
41
Why do we get the flu more often in the winter
132
Is there any proof that Alzheimers disease is related
138
What determines whether a substance is transparent?
144
Why does bruised fruit turn brown?
150
How is caffeine removed to produce decaffeinated coffee?
151
Do vitamins in pills differ from those in food?
157
Theres No Place
163
What is the meaning of the phrase It is too cold
170

Under the
47
How can sea mammals drink saltwater?
53
How do deepdiving sea creatures withstand
56
Why do cats purr?
62
Up Above
67
Do unbred animals lack the individual distinctiveness
69
What do we know about the evolution of sleep?
76
How close are we to being able to clone a dinosaur?
84
Can the human race be devolving?
92
Oh Behave
99
Do humans have some kind of homing
105
Do people lose their senses of smell and taste
111
Why does your stomach growl when you are hungry?
118
If the cells of our skin are replaced regularly
124
Why does reading in a moving car cause
130
Where do geysers get their water from?
179
What is quicksand?
186
Much Ado About Nothing
191
How does a laser measure the speed of a car?
197
How do rewritable CDs work?
203
Let There Be Light
207
particles
213
What are booming sands and what
219
Is dark matter theory or fact?
227
Does the speed of light ever change?
234
Shake It
241
Why does shaking a can of coffee cause
244
Why does a ball go farther when hit with
250
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Página 193 - Who hath laid the measures thereof, if thou knowest? or who hath stretched the line upon it? Whereupon are the foundations thereof fastened? or who laid the corner stone thereof; When the morning stars sang together, and all the Sons of God shouted for joy?
Página 129 - And the harp, and the viol, the tabret, and pipe, and wine, are in their feasts: but they regard not the work of the LORD, neither consider the operation of his hands.
Página 233 - The positron is a particle with the same mass as the electron, but with a positive instead of a negative charge.
Página 3 - Sun in the asteroid belt, which lies between the orbits of Mars and Jupiter.
Página 21 - The planets all revolve around the Sun in the same direction, and the Sun rotates in this direction as well.
Página 177 - During several of the summer months of the year 1783, when the effects of the sun's rays to heat the earth in these northern regions should have been the greatest, there existed a constant fog over all Europe, and a great part of North America.
Página 206 - ... computer pioneer John von Neumann presented a paper on the "Theory and Organization of Complicated Automata," in which he postulated that a computer program could reproduce. Bell Labs employees gave life to von Neumann's theory in the 1950s in a game they called "Core Wars.
Página 15 - With its large body and internal heating from radioactive elements, a planet behaves like a fluid, and over long periods it succumbs to the gravitational pull from its center of gravity. The only way to get all the mass as close to a planet's center of gravity as possible is to form a sphere, a process called isostatic adjustment.
Página 105 - France, studied a 27year-old man with this disorder and found he had virtually no sleep over a period of several months. During that time he did not feel sleepy or tired and did not show any disorders of mood, memory, or anxiety. Nevertheless, nearly every night between...

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