markowitz (am45362) – HW09 – distler – (56295)
1
This
printout
should
have
22
questions.
Multiplechoice questions may continue on
the next column or page – find all choices
before answering.
For the siphon problem, note that the pres
sure in the hose must be everywhere non
negative
001
10.0points
A constriction in a pipe reduces its diameter
from 4
.
7 cm to 2
.
3 cm
.
Where the pipe is
wider, the fluid velocity is 8 m
/
s
.
Find the fluid velocity where the pipe is
narrow.
Answer in units of m
/
s
002
10.0points
A small metal sphere weighs 0
.
287 N in air
and has a volume of 16
.
1 cm
3
.
What is the acceleration of the sphere as
it falls through water?
The acceleration of
gravity is 9
.
8 m
/
s
2
.
Answer in units of m
/
s
2
003(part1of2)10.0points
In a machine shop, a hydraulic lift is used to
raise heavy equipment for repairs.
The sys
tem has a small piston with a crosssectional
area of 0
.
066 m
2
and a large piston with a
crosssectional area of 0
.
171 m
2
.
An engine
weighing 2200 N rests on the large piston.
What force must be applied to the small
piston in order to lift the engine?
Answer in units of N
004(part2of2)10.0points
If the engine rises 0
.
151 m, how far does the
smaller piston move?
Answer in units of m
005
10.0points
Consider a steel ax and an aluminum piston.
(Note that steel is denser than aluminum.)
When weighed in water, the ax and the piston
have the same apparent weight.
But when the same ax and the same piston
are weighed in air,
1.
the wider object weighs more than the
other.
2.
they again have equal weights, but both
are heavier than they are in water.
3.
the ax is heavier than the piston.
4.
they again have equal weights, but both
are lighter than they are in water.
5.
the longer object weighs more than the
other.
6.
the piston is heavier than the ax.
006
10.0points
A large storage tank is filled to a height 54 cm.
The tank is punctured with a small hole at a
height 28 cm from the bottom of the tank.
h
h
0
How far from the tank will the stream land?
Assume that the tank is very large so that the
velocity of the liquid at the top of the tank is
zero.
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 Spring '08
 Kaplunovsky
 Physics, water speed

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