Customer Reviews for

Why Does E=mc2?: (And Why Should We Care?)

Average Rating 4
( 61 )
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(36)

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(11)

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(7)

2 Star

(4)

1 Star

(3)

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Most Helpful Favorable Review

3 out of 6 people found this review helpful.

Great book but...

I thought the book was great. It really made you think about stuff that maybe a "regular guy" just doesn't get around to thinking about during his typical craziness that is life. I try to read as much science/philosophy books as I can and the chapter about life was pa...
I thought the book was great. It really made you think about stuff that maybe a "regular guy" just doesn't get around to thinking about during his typical craziness that is life. I try to read as much science/philosophy books as I can and the chapter about life was particularly fascinating.

The only thing about the book that I must say really against it (the "but" part of my headline) is that I think it might come across slightly as one of those heretical conspiracy-type books. When the author discusses things such as life on Mars and the supposed cover up/backtracking of everything it gets to sounding like its on the verge some crazy who has an ax to grind with anyone and anything. Again, this is very slight. It is NOT one of those "the CIA knows everything and we are just the sheep" type books-not even close. It does however, leave that kind of aftertaste after reading a couple of those chapters.

posted by edsword on December 28, 2009

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Most Helpful Critical Review

1 out of 1 people found this review helpful.

Either the equations are messed up or the symbols don't translat

Either the equations are messed up or the symbols don't translate correctly in the electronic version. The authors say they are going to explain relativity using math no more complex than the pythagorean theorum and then claim it isn't a book about "maths" whe...
Either the equations are messed up or the symbols don't translate correctly in the electronic version. The authors say they are going to explain relativity using math no more complex than the pythagorean theorum and then claim it isn't a book about "maths" when they produce a result without explaining how they got there. At a minimum there should be an appendix showing the calculation.

But that isn't the worst part. The authors add symbols without telling you what they are or where they came from. So, on p. 38, the square root of 1/ (c squared - ^ squared) becomes 1/ square root c squared ^ v squared. Huh? Where did v come from? Is it a variable, an operator, what? We don't know because the authors don't say. We know it doesn't mean velocity, because that's what ^ is defined as. Confusing enough, but then further down the same page, the square root c squared ^ v squared becomes ^squared/ c squared, again with no explanation. Thanks for the "maths" lesson guys.


posted by Ladydog on July 18, 2012

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  • Anonymous

    Posted April 16, 2013

    I CARE ENOUGH TO POST HERE@@@

    I think its terrible that all those people died when the bombers came to boston. But think about what this is showing us. other countries hate America and we dont have a good enough security system to save all those people. We need to step up and put our foot down. There have been too many bombings in these few generations that have passed. Its time we stand up for ourselves and save the people in the future who might be affected by the bombs. Its our time to save the future!!! (Post a @ somewhere in your post if you agree)

    0 out of 2 people found this review helpful.

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  • Anonymous

    Posted April 16, 2013

    I care

    It's so sad. I will so wear purple tommorow.

    0 out of 2 people found this review helpful.

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