A fire starts in an apartment building in downtown Boston. When the firefighters arrive, they immediately get to work putting out the fire using a fire hose. The water for the fire hose is provided by a fire hydrant at ground level. Assume that the velocity of the liquid coming from the fire hydrant is 1.6 m/s, and that the pressure at the hose nozzle is atmospheric pressure (101000 Ра). a. The firefighters start with the ground floor, so there is no change in height between the fire hydrant and the hose nozzle. If the velocity of the water coming out of the nozzle is 12.8 m/s, find the pressure at the fire hydrant in units of Pa. b. After the ground floor fire is put out, another fire is spotted on another floor. A firefighter carrying the hose is lifted on a platform to the same height as the fire, which is 44.35 m above the ground. Assuming that the pressure found in part a) remains constant, what would be the new velocity of the water coming out of the nozzle at this new height?
A fire starts in an apartment building in downtown Boston. When the firefighters arrive, they immediately get to work putting out the fire using a fire hose. The water for the fire hose is provided by a fire hydrant at ground level. Assume that the velocity of the liquid coming from the fire hydrant is 1.6 m/s, and that the pressure at the hose nozzle is atmospheric pressure (101000 Ра). a. The firefighters start with the ground floor, so there is no change in height between the fire hydrant and the hose nozzle. If the velocity of the water coming out of the nozzle is 12.8 m/s, find the pressure at the fire hydrant in units of Pa. b. After the ground floor fire is put out, another fire is spotted on another floor. A firefighter carrying the hose is lifted on a platform to the same height as the fire, which is 44.35 m above the ground. Assuming that the pressure found in part a) remains constant, what would be the new velocity of the water coming out of the nozzle at this new height?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:A fire starts in an apartment building in downtown Boston. When the firefighters arrive, they
immediately get to work putting out the fire using a fire hose. The water for the fire hose is
provided by a fire hydrant at ground level. Assume that the velocity of the liquid coming from the
fire hydrant is 1.6 m/s, and that the pressure at the hose nozzle is atmospheric pressure (101000
Pa).
a. The firefighters start with the ground floor, so there is no change in height between the fire
hydrant and the hose nozzle. If the velocity of the water coming out of the nozzle is 12.8 m/s,
find the pressure at the fire hydrant in units of Pa.
b. After the ground floor fire is put out, another fire is spotted on another floor. A firefighter
carrying the hose is lifted on a platform to the same height as the fire, which is 44.35
m above the ground. Assuming that the pressure found in part a) remains constant, what
would be the new velocity of the water coming out of the nozzle at this new height?
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