Answers26-27 LISD TX-Physics B-CR rev. 525Unit Test

Unit Test — Unit test Answers

26 verified answers
22
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What type of spectrum is produced when electromagnetic radiation is emitted or absorbed as electrons change energy levels in an atom? ( Please list one word only and lower case )

Answer not available
23
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Walt made a study chart listing uses for two types of electromagnetic waves.

Question illustration
A
A: Infrared WavesB: X-rays
B
A: MicrowavesB: Ultraviolet Waves
C
A: Ultraviolet WavesB: Gamma Rays
D
A: X-raysB: Radio Waves
24

A ray diagram is shown.

Question illustration
A
W
B
X
C
Y
D
Z
25

A force of 60 N is used to stretch two springs that are initially the same length. Spring A has a spring constant of 4 N/m, and spring B has a spring constant of 5 N/m.

A
Spring B is 1 m longer than spring A because 5 – 4 = 1.
B
Spring A is the same length as spring B because 60 – 60 = 0.
C
Spring B is 60 m longer than spring A because 300 – 240 = 60.
D
Spring A is 3 m longer than spring B because 15 – 12 = 3.
26

A patient is receiving treatments for brain cancer. Which electromagnetic waves are most likely being used as part of the treatment?

A
infrared
B
ultraviolet
C
microwave
D
gamma ray
27

A ray diagram is shown.

Question illustration
A
W
B
X
C
Y
D
Z
28

What is the energy of a photon with a frequency of 1.7 × 1017 Hz? Planck’s constant is 6.63 × 10–34 J•s.

A
1.1 × 10–17 J
B
1.1 × 10–16 J
C
8.3 × 10–16 J
D
8.3 × 10–15 J
29

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

A
acceleration and displacement
B
acceleration and net force
C
velocity and displacement
D
displacement and net force
30

Which best compares concave and plane mirrors?

A
Plane mirrors produce only virtual images, and concave mirrors produce real and virtual images.
B
Plane mirrors produce only real images, and concave mirrors produce real and virtual images.
C
Concave mirrors produce only real images, and convex mirrors produce real and virtual images.
D
Concave mirrors produce only virtual images, and convex mirrors produce real and virtual images.

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