Nonfiction What Einstein Told His Barber: More Scientific Answers to Everyday Questions

Author: Robert Wolke
Publisher: Dell
Publish Date: (March 7, 2000)
ISBN: 0440508797
Pages: 288

Its wonderfull book about smethings we allways wonderabout very amazing and entertaing Fascinating....Will provide hours of fun and knowledge for kids of any age (and we mean up to 90) and offer helpful tips and satisfy the curiosity of the average householder some issue discussed in the book : This book is imaginative and entertaining. It explains in simple terms the hows and whys

of many things we observe often but really don't understand. His editor has done a fine job with spelling and punctuation, but he needs

someone to check his math: p13 "In one experiment, out of 500 .30-caliber machine-gun bullets fired

straight upward, only four landed within 10 square feet

(3 square meters) of the gun". While 10 feet is about 3 meters, 10 square feet is about 1 square meter and would

lie within 22 inches of the gun - not a very safe place to wait.

p26-27 "There is a certain speed called the ESCAPE VELOCITY, 25000 mph,

that an object must achieve to circle the Earth in stable orbit and

not fall down."

Actually the speed needed for circular orbit is less by a factor of

the square root of two, about 18000 mph. On p.121 the author has

astronauts orbiting at the proper speed.

Escape velocity launches an object into a parabolic trajectory which

Escapes (imagine that) the earths gravity and never returns. p33 (and p.64) Speed of light 186,000 miles per second (3 million kilometers per second) Oops! That should be 300,000 kilometers per second. p81 Author computes 621 degrees Fahrenheit to be twice the absolute

temperature of 80F. This should be 519.7F; but it is only because of sloppy conversion

from Fahrenheit to Celsius and back. p103 (and p120) "Earth is sailing around the Sun at more than 10,000 mph

(10600 mph on p120) It is actually about 66,675 mph - higher by a factor of 2 Pi (6.28...).

Apparently he used the distance TO the Sun instead of the distance AROUND

the Sun. p106 The idea that "astoundingly realistic pictures of the oceans bottoms" are

created from satellite radar scans of the ocean surface which has

been modified by the gravitational effect of peaks and trenches on

the oceans bottom is absurd. These detailed maps are created from side-scanning SONAR surveys. p124 "... at the bottom of a ten mile shaft you'd weigh about 0.7% less than

at the surface." 10 miles down you are .25% closer to the left of the earth; the

mass of the sphere beneath you has decreased by about .75%.

Since gravity is proportional to Mass divided by the square of

distance, it has decreased about .25% (.9975^3/.9975^2 = .9975).

Apparently Prof. Wolke forgot about the nearness of you. p150 Prof. Wolke lists the speed of sound as 740 mph at 0 deg C, 900 mph

at 20 deg C, and 947 mph at 27 deg. His value at 0 deg is correct, but since speed of sound varies with

the square root of absolute temperature, the other values should be

767 mph and 776 mph.

He is as much as 22% high. p170 "It isn't very unusual for two full moons to fall in the same month;

it happens about four times a year" In fact, it is impossible to have more than 2 BLUE moons in a year;

and then they must be in January and March. Because of the 29.5 day lunar cycle, a blue moon must fall in the

last half day of a 30 day month or the last day and a half of a 31

day month (February is impossible).

4 x .5 + 7 x 1.5 = 12.5 days per year. The chance of

any moon being 'blue' is 12.5 / 365.25 = .0342

There are 365.25 / 29.5 = 12.4 full moons per year.

This comes to .423 blue moons per year or 1 every 2.36 years;

about the same frequency as 4 full moons in one season. p187 "dissolve a half teaspoon of salt in a half cup (250 milliliters) of

water. 1 liter is more than a quart; so a half liter is more than a pint;

so a quarter liter (250 milliliters) is more than a cup. In summary, this book was a lot of fun to read, and has some good science

in it; but his numbers should be taken with a grain (0.065 gm) of salt so please anybody have it please upload it

Server	Status
Download Links
No download url, please check the above content. Free download from UseNet >> Can not download? Search other download URLs here >> Buy This Book at Best Price >>

	Encyclopedias The Great Book of Questions and Answers: Over 1000 Questions and Answers Arcturus Editorial Board, " The Great Book of Questions and Answers: Over 1000 Questions and Answers " Arcturus foulsham \| 2007-07-06 \| ISBN: 0572033354 \| 208 pages \| PDF \| 29,7 Mb thkx a lot! rs links please! For more e-book ...
	Encyclopedias Nolo's Encyclopedia of Everyday Law: Answers to Your Most Frequently Asked Legal Questions Shae Irving “Nolo's Encyclopedia of Everyday Law: Answers to Your Most Frequently Asked Legal Questions" NOLO \| 2008-01-15 \| ISBN:1413305601 \| 446 pages \| PDF \| 2,1 MB How do I get a collection agency to stop harassing me? If I work 50 ...
	Science/Engineering Scientific American's Ask the Experts: Answers to The Most Puzzling and Mind-Blowing Science Questions Editors Of Scientific American, "Scientific American's Ask the Experts: Answers to The Most Puzzling and Mind-Blowing Science Questions" Collins \| 2003-11-01 \| ISBN: 0060523360 \| 288 pages \| PDF \| 2,6 MB Why is the night sky dark? How d ...
	Science/Engineering EarthTalk: Expert Answers to Everyday Questions About the Environment E Magazine, "EarthTalk: Expert Answers to Everyday Questions About the Environment" English \| 2009 \| ISBN: 0452290120 \| 320 pages \| PDF \| 2,1 MB From the authors of the leading environmental handbook Green Living— the best of E’s nation ...
	Study The Great Book of Questions and Answers: Over 1000 Questions and Answers (repost) The Great Book of Questions and Answers: Over 1000 Questions and AnswersArcturus foulsham \| July 6, 2007 \| ISBN: 0572033354 \| 208 pages \| PDF \| 28MB Ever wondered whether ostriches really bury their heads in the sand, or what gas giants are ...
	Economics/Finances Everyday Economics: Honest Answers to Tough Questions Lawrence H. Officer, "Everyday Economics: Honest Answers to Tough Questions" Palgrave Macmillan 2009 \| ISBN-10: 0230617115 \| 224 Pages \| PDF \| 1,9 MB From how the current crisis happened to the role of banks to how money works, this book a ...

Share this page with your friends now!
Text link
Forum (BBCode)
Website (HTML)

Book123

Categories

Share With Friends

Archive by Date

Search Tag

Newest

Useful Links

Nonfiction What Einstein Told His Barber: More Scientific Answers to Everyday Questions

Related Articles

DISCLAIMER:

Comments (0) All