(I) What is the approximate mass of air in a living room5.6 m x 3.6 m × 2.4 m?

Answered: (I) What is the approximate mass of air…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter15: Fluids

Section: Chapter Questions

Problem 10PQ

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The inside volume of a house is equivalent to that of a rectangular solid 13.0 m wide by 200 m long by 2.75 m high. The house is heated by a forced air gas heater. The main uptake air duct of heater is 0.300 m in diameter. What is the average speed of the duct if it carries a volume equal to that of the house’s interior every 15 minutes?
How many cubic meters of helium are required to lift a balloon with a 400-kg payload to a height of 8 000 m? Take He = 0.179 kg/m3. Assume the balloon maintains a constant volume and the density of air decreases with the altitude z according to the expression air = 0ez/8, where z is in meters and 0 = 1.20 kg/m3 is the density of air at sea level.
How many cubic meters of helium are required to lift a light balloon with a 400-kg payload to a height of 8 000 m? Take Hc = 0.179 kg/m3. Assume the balloon maintains a constant volume and the density of air decreases with the altitude z according to the expression pair = 0e-z/8 000, where z is in meters and 0 = 1.20 kg/m3 is the density of air at sea level.
A garden hose with a diameter of 2.0 cm is used to fill a bucket, which has a volume of 0.10 cubic meters. It takes 1.2 minutes to fill. An adjustable nozzle is attached to the hose to decrease the diameter of the opening, which increases the speed of the water. The hose is held level to the ground at a height of 1.0 meters and the diameter is decreased until a flower bed 3.0 meters away is reached. (a) What is the volume flow rate of the through the nozzle when the diameter 2.0 cm? (b) What does is the speed of coming out of the hose? (c) What does the speed of the water coming out of the hose need to be to reach the flower bed 3.0 meters away? (d) What is be diameter of nozzle needed to reach be flower bed?
(b) An advertising blimp consists of a gas bag, the supporting structure for the gas bag, and the gondola hung from the bottom, with its cabin, engines, and propellers. The gas bag is about 25 m long with a diameter of about 13 m, and it is filled with helium (density about 4 g per 22.4 l under these conditions). Estimate the total mass of the blimp, including the helium. (Assume the blimp is in the shape of a cylinder, and that the density of air is 1.2 kg/m3.)
Assuming the human body is primarily made of water, estimate the number of molecules in it. (Note that water has a molecular mass of 18 g/mol and there are roughly 1024 atoms in a mole.)
Estimate the number of air molecules in an average-sized room.
3. ssm Accomplished silver workers in India can pound silver into in- credibly thin sheets, as thin as 3.00 × 10-7 m (about one-hundredth of the thickness of this sheet of paper). Find the area of such a sheet that can be formed from 1.00 kg of silver.
The atmospheric pressure on earth is 101kPa. The surface area of the earth is related to its mean radius r which has a value of 6400km. Calculate the mass of the earth’s atmosphere, assuming g does not vary with height above the Earth’s surface. Calculate the number of nitrogen and oxygen molecules present on this atmosphere (take note: molecules).
(a) When rebuilding his car's engine, a physics major must exert 3.00 × 10² Nof force to insert a dry steel piston into a steel cylinder What is the normal force between the piston and cylinder?
Suppose a table tennis ball has a diameter of 3.5 cm. Calculate the depth, in kilometers, to which Avogadro’s number of table tennis balls would cover the Earth. Assume the space between balls adds an extra 25.0% to their volume and assume they are not crushed by their own weight. The radius of Earth is 6.376 × 106 m.
41 SSM A cord is a volume of cut wood equal to a stack 8 f long, 4 ft wide, and 4 ft high. How many cords are in 1.0 m3? ntoins two atoms of hydroger

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(I) What is the approximate mass of air in a living room 5.6 m x 3.6 m × 2.4 m?