That means that you were put "on the spot" in front of everyone.
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I assume you mean 1 billion US dollars. At current rates, that is 500,000,000 pounds Unless you use the English definition of billion of 1 million million, instead of the US definition of 1 thousand million. then the answer is 500,000,000,000 pounds. Luckily this definition has been mostly abandoned.
252.3
Around 0.08%
64 fluid ounces (US) is 4 US pints or half a gallon.
As with any other wavelength of the electromagnetic spectrum, they can be good or bad depending on the use to which they are put.