lim (kl9356) – Physics 1710 Homework 1 – Weathers – (17104)
1
This
printout
should
have
9
questions.
Multiplechoice questions may continue on
the next column or page – find all choices
before answering.
001
10.0 points
The
mass
of
the
planet
Saturn
is
5
.
64
×
10
26
kg and its radius is 6
×
10
7
m.
Calculate its density.
Answer in units of
kg
/
m
3
.
002
10.0 points
This problem shows how dimensional analysis
helps us check and sometimes even find a
formula.
A rope has a cross section
A
= 10
.
7 m
2
and
density
ρ
= 2150 kg
/
m
3
. The “linear” density
of the rope
μ
, defined to be the mass per unit
length, can be written in the form
μ
=
ρ
x
A
y
.
Based on dimensional analysis, determine
the powers
x
and
y
by choosing an expression
below.
1.
μ
=
A
ρ
2
2.
μ
=
1
ρ A
3.
μ
=
A
2
ρ
4.
μ
=
ρ A
5.
μ
=
1
ρ A
2
6.
μ
=
A
2
ρ
2
7.
μ
=
ρ
A
2
8.
μ
=
ρ A
2
9.
μ
=
ρ
A
10.
μ
=
A
ρ
003
10.0 points
A light year is the unit of distance that light,
with a speed of 2
.
99792
×
10
8
m
/
s, travels in
one year.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Fall '08
 Weathers
 Magnetism, Acceleration, Mass, Work, Velocity

Click to edit the document details