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So I watched 'Journey to the center of the earth' today, and I was reminded of a common physics question. Like if you were to let a stone fall; the seconds between when released and when the sound of the stone hitting the ground is heard indicates the distance to the ground.

Method:

For e.g.

It falls----------->It hits------------------->Its heard
0-------------->X seconds-------------->23seconds later

Sound travels at 343m/s

d = 0.5gt²

Assuming X is 16:

= 9.8 * 16² * 0.5
= 1254.4m

Time it takes to be heard, 1254.4/343 i.e. the time between x and the time it was heard.
=3.65seconds

3.65 + 16seconds = 19.65 seconds. Thus X must be >16

The table below indicates the second-distance (for up to 20seconds) with relative accuracy.



The Calculator below works in excel 2007. Just type in the seconds in the colored box and press enter. http://www.wikiupload.com/comment.php?id=46047

p.s. you need to activate continous via going to excel options>formulas> and tick allow iterations

AFTER AUGHRIM

She said, “They gave me of their best,
They lived, they gave their lives for me;
I tossed them to the howling waste,
And flung them to the foaming sea.”
She said, “I never gave them aught,
Not mine the power, if mine the will;
I let them starve, I let them bleed,—
They bled and starved, and loved me still.”
She said, “Ten times they fought for me,
Ten times they strove with might and main,

Ten times I saw them beaten down,
Ten times they rose, and fought again.”
She said, “I stayed alone at home,
A dreary woman, grey and cold;
I never asked them how they fared,
Yet still they loved me as of old.”
She said, “I never called them sons,
I almost ceased to breathe their name,
Then caught it echoing down the wind,
Blown backwards from the lips of Fame.”
She said, “Not mine, not mine that fame;
Far over sea, far over land,
Cast forth like rubbish from my shores,
They won it yonder, sword in hand.”

She said, “God knows they owe me nought,
I tossed them to the foaming sea,
I tossed them to the howling waste,
Yet still their love comes home to me.” - Emily Lawless