Give me mass

Classical Mechanics Level 3

From how much mass in pounds can you extract 528880500000000000 joules of energy?

The answer is 12.95535461.

1 solution

Ashish Menon
May 24, 2016

$E = mc^2\\ 5288805× {10}^{11} = x × {\left(3×{10}^8\right)}^2\\ x = \dfrac{5288805 × {10}^{11}}{9 × {10}^{16}}\\ = 5.87645$

The value of x is presently in kilograms. We have to convert it into pounds.
$1$ pound = $0.453592$ kg.
So, $5.87645$ kg = $\dfrac{5.87645}{0.453592} = \color{#69047E}{\boxed{12.95535461}}$ .

😁 thanks for posting the solution.

Rishabh Sood - 5 years ago

@Rishabh Sood

Hello brother.

Thanks for posting a problem based on the very famous equation. But keep in mind, making values increasingly big and asking for conversion of quantities into other units doesn't raise the difficulty of the problem, rather makes it very tedious. If you are posting such questions with values of high orders, you must write them in scientific notation. Also, please post elegant questions on physics, as manual tedious calculations can even be performed by a donkey, which doesn't make the problem special.

Cheers!

Swapnil Das - 5 years ago

Thanks for your suggestions, will surely work on it. So kind of you to give such nice suggestions. This is not sarcastic, Cheers, Rishabh To:@Swapnil Das

Rishabh Sood - 5 years ago

@Rishabh Sood – You are most welcome. Come back with more problems on Brilliant.

Cheers!

Swapnil Das - 5 years ago

@Swapnil Das – My comment below is directed to you too:- Shake hands. Tell to Rishabh:- "Hello brother, I am shaking hands with you"

Ashish Menon - 5 years ago

@Ashish Menon – 😂😂😂😂 stop it bro

Rishabh Sood - 5 years ago

@Rishabh Sood – XD I was getting childish was I not

Ashish Menon - 5 years ago

@Ashish Menon – Yes, but he didn't do what you said

Rishabh Sood - 5 years ago

@Rishabh Sood – He did what I said look .

Ashish Menon - 5 years ago

@Rishabh Sood – Shake hands friends and enlighten your world.

Ashish Menon - 5 years ago

Very welcome

Ashish Menon - 5 years ago

Give me mass

The answer is 12.95535461.

1 solution

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