Oregon State University
PH 202
Winter Term 2012
Midterm Exam 1
(Wednesday, January 25, 7:00 p.m.)
GENERAL DIRECTIONS:
Fill out the cover sheet completely
, as indicated—including your test form letter, which is C.
Follow the specific directions on each page of the answer form
.
Use standard SI units unless directed otherwise; use three significant digits in all
final numerical answers.
Questions #14 are worth 8 points each; #57 are worth 10 points each; #89 are worth 12 points; #10 is worth 14 points.
Physical constants and other possibly useful information
V
sphere
= (4/3)
p
r
3
V
cylinder
=
p
r
2
h
V
cube
=
s
3
g
=
9.80 m/s
2
1 atm =
1.01 x 10
5
Pa
r
water
=
1000 kg/m
3
r
Hg
=
13,600 kg/m
3
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1.
Three blocks are placed in a tub
(A)
Block 2 has the largest buoyant force acting on it.
with water (see bottom of page).
(B)
Block 1 must be more dense than block 2.
The blocks have volumes
V
1
,
V
2
(C)
Block 1 must have more mass than block 2.
and
V
3
.
Only blocks 1 and 2 float,
(D)
All of the above.
and
V
1
<
V
2
<
V
3
.
Which is false?
(E)
A and B only.
(F)
A and C only.
(G)
B and C only.
(H)
None of the above.
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2.
Which statement is true?
(A)
Archimedes’ Principle states that the buoyant force is the fluid pressure
exerted on the underside of any part of any object immersed in that fluid.
(B)
Pascal’s Principle states that pressure is the same throughout any body of
incompressible fluid.
(C)
Bernoulli’s equation equates the mechanical energy density of any two
points in a steady flow of incompressible fluid.
(D)
All of the above.
(E)
A and B only.
(F)
A and C only.
(G)
B and C only.
(H)
None of the above.
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
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 Winter '08
 Staff
 Physics, Fluid Dynamics

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