Question

Consider a typical adult weighing 165.0 lb and possessing a
density of 987.0 kg/m^{3}. What is the minimum pressure
(atm) drop necessary to measure the person's density if the weight
scale can only measure to the nearest 0.20? Assume air is an ideal
gas, and the chamber is maintained at standard temperature as the
air is evacuated. The density of air at sea level is roughly 1.22
kg/m^{3}.

Answer #1

1. The density of
water is 1000 kg/m3. Compared to this, the
density of air at sea level is
approximately
1000 times less.
approximately 100
times less.
approximately 10
times less.
about the
same.
2. What is the gauge pressure at the bottom
of a 5 feet deep swimming pool? (Answer in Pa)
3.You are given the
task to determine the volume of an irregular shaped object. You
hang it on a scale and measure its weight to be 34...

The density of uncompressed air is 1.293 kg/m3, and
one mole of air (containing Avogadro's number of molecules) has a
mass of 28.94 g.
a) Use the density and the volume of the uncompressed air 45 cc to
determine the mass of the air in the syringe,
mair, in grams. (You will have to do some unit
conversions.)
mair = ______ g
b)Use the mass of one mole of air and Avogadro's number to
determine N, the number of molecules in...

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