oldmidterm 01 – NOORANI, ZOHEB – Due: Feb 11 2008, 4:00 am
1
Question 1, chap 1, sect 5.
part 1 of 1
10 points
A newly discovered Jupiterlike planet has
an average radius 11
.
1times that of the Earth
and a mass 316 times that of the Earth.
Calculate the ratio of new planet’s mass
density to the mass density of the Earth.
Answer in units of .
Question 2, chap 1, sect 5.
part 1 of 1
10 points
A piece of wire has a density of 9
.
4 g
/
cm.
What is the mass of 11
.
2 cm of the wire?
Answer in units of g.
Question 3, chap 1, sect 6.
part 1 of 1
10 points
Identify the equation below which is dimen
sionally
incorrect
.
A, x, y
and
r
have units of length.
k
here
has units of inverse length.
v
0
and
v
have units
of velocity.
a
and
g
have units of acceleration.
ω
has units of inverse time.
t
is time,
m
is
mass,
V
is volume,
ρ
is density, and
F
is force.
1.
F
=
m ω
2
r
2.
v
=
±
ω
r
A
2

x
2
3.
t
=

v
0
+
R
v
2
0
+ 2
a x
a
+
v
2
a
2
t
4.
v
=
r
2
g y
+
±
r F
m
5.
F
=
m g
b
1 +
v
r g
B
6.
v
0
=
r
v
2

2
a x
7.
g
=
F
m
+
ρ
m
g V
8.
y
=
A
cos(
k x

ω t
)
Question 4, chap 1, sect 99.
part 1 of 1
10 points
Two airplanes leave an airport at the same
time.
The velocity of the ±rst airplane is
660 m
/
h at a heading of 60
.
5
◦
. The velocity
of the second is 580 m
/
h at a heading of 122
◦
.
How far apart are they after 1
.
8 h?
Answer in units of m.
Question 5, chap 1, sect 1.
part 1 of 2
10 points
The graph below shows the measurement
and accuracy of Jill riding a bicycle at a con
stant speed on a country path.
0 2 4 6 8 10 12 14 16 18 20 22 24
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
Distance
vs
Time
Time (minutes)
Distance (meters)
Jill has been riding for 15 min
±
1
.
95 min.
She has gone a distance of 66 m
±
9
.
9 m.
Estimate her speed.
Answer in units of m
/
min.
Question 6, chap 1, sect 1.
part 2 of 2
10 points
What is the uncertainty in her speed, as
calculated in Part 1?
Answer in units of m
/
min. Answer within a
tolerance of
±
8 percent.
Question 7, chap 2, sect 1.
part 1 of 2
10 points
You drive a car 8 h at 45 km
/
h, then 8 h at
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View Full Documentoldmidterm 01 – NOORANI, ZOHEB – Due: Feb 11 2008, 4:00 am
2
63 km
/
h.
What is your average velocity?
Answer in units of km
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 Spring '08
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 Mass

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