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Practice Exam Answers

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What are some applications of the field of spectroscopy? Choose five correct answers.

A
for killing bacteria in foods
B
for producing neon lights
C
for identifying elements in a sample
D
for use in medical imaging devices
E
for determining the distance and velocity of galaxies
F
for determining types of chemical bonds
23
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Which applications, either for diagnostic purposes or for therapeutic purposes, involve radioactive materials placed in the body? Choose three correct answers.

A
laser eye surgery
B
radioisotope imaging
C
radiopharmaceuticals
D
brachytherapy
E
external beam radiation therapy
F
MRI
G
lithotripsy
24

Which change can make a generator stronger?

A
increasing the number of coils in the armature
B
increasing the size of the slip rings
C
decreasing the number of coils in the armature
D
decreasing the size of the slip rings
25

What is the current in a circuit with a 9 point 0 cap v battery and a resistance of 36 point 0 cap omega ?

A
45 cap A
B
4 point 0 cap A
C
324 cap A
D
0 point 2 5 cap A
26

According to Einstein’s first postulate about the special theory of relativity, which best explains why a person feels like he or she is sitting still on a train that is moving at a constant speed of 60 miles per hour?

A
The motion of the train and of the person are not relative to each other.
B
The train is moving more slowly than the speed of light.
C
The person is moving at the same speed as the train.
D
The reference frame of the person is inside the train.

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