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How many 25 ml vials can they fill

1. A deep space probe is traveling at a velocity of 18.8km/s. What is its velocity in miles/minutes?

2. Astronomers have measured a faint galaxy to be at a distance of 200 megaparsecs from earth? How far is this in miles? (1 Parsec = 3.26 Light-years, Mega = 1x10^6).

3. A perfume company wants to dispense 13.9 quarts of a new fragrance into small vials. How many 25 ml vials can they fill?

4. An Eon of time is defined as 1 billion years (1x10^9 years). How long is this in seconds? Assume one year is equal to 365.25 days.

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## Q : What fraction of the volume of e. coli is dna

A cell of E. coli contains about 10-14 g if DNA. A DNA strand (modelled as a cylinder) is 20 Å in diameter and has a mass of about 2 x 10^6 daltons for each µ m of length. What fraction of the volume of E. coli is DNA.