yoon (jey283) – Ch17h1 – turner – (56545)
1
This
printout
should
have
20
questions.
Multiplechoice questions may continue on
the next column or page – find all choices
before answering.
001
10.0points
What is the kinetic energy of a proton that is
traveling at a speed of 3650 m
/
s?
Take the
mass of the proton to be 1
.
67
×
10

27
kg.
Answer in units of J
002
10.0points
If
the
kinetic
energy
of
an
electron
is
4
.
1
×
10

18
J, what is the speed of the elec
tron?
You can use the approximate (non
relativistic) formula here.
Take the mass of
the electron to be 9
.
11
×
10

31
kg.
Answer in units of m
/
s
003(part1of4)10.0points
Locations
A
,
B
, and
C
are in a region of
uniform electric field, as shown in the diagram
below.
A
B
C
vector
E
Location
A
is at
vectorr
A
=
(−
0
.
7
,
0
,
0
)
m
.
Location
B
is at
vectorr
B
=
(
0
.
8
,
0
,
0
)
m
.
In the region the electric field has the value
vector
E
=
(
730
,
0
,
0
)
N
/
C
.
For a path starting at
B
and ending at
A
,
the displacement vector Δ
vector
ℓ
will be of the form
Δ
vector
ℓ
=
(
Δ
x,
0
,
0
)
.
Find Δ
x
.
Answer in units of m
004(part2of4)10.0points
Now find the change in electric potential along
this path.
Answer in units of V
005(part3of4)10.0points
Find the change in potential energy when
a proton (
m
p
= 1
.
7
×
10

27
kg and
q
p
=
1
.
6
×
10

19
C) moves from
B
to
A
.
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 Fall '11
 TURNER,J
 Energy, Kinetic Energy, Potential Energy, Electric charge, Yoon

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