# Magnetic Field and Instructor Explanation

6486 words 26 pages

There are 2 pages in this exam:
Page:
1 2

1.
Question:
(TCO 4) A body moving with an acceleration having a constant non-zero magnitude must experience a change in: Your Answer:

Speed

acceleration

velocity

CORRECT

weight

Instructor Explanation:
Remediation: Knight, Chapter 1.6 Points Received:
6 of 6
2.
Question:
(TCO 4) A ball is dropped from a 250 foot building. How long before the ball hits the ground? Your Answer:

2.025 sec

3.95 sec

CORRECT

4.62 sec

15.62 sec

Instructor Explanation:
Remediation: Knight, Chapter 2.5 Points Received:
6 of 6
3.
Question:
(TCO 4) A bullet is

540 psi

1400 psi

CORRECT

1950 psi

2400 psi

Instructor Explanation:
Remediation: Knight, Chapter 16.5 Points Received:

5.
Question:
(TCO 4) Virtual images formed by a convex mirror are always: Your Answer:

on the side of the mirror opposite the source

CORRECT

on the same side of the mirror as the source but closer to the mirror than the focal point

on the same side of the mirror as the source but closer to the mirror than the source

on the same side of the mirror as the source but further from the mirror than the focal point

Instructor Explanation:
Remediation: Knight, Chapter 23.6 Points Received:

6.
Question:
(TCO 4) Radio waves are readily diffracted around buildings whereas light waves are negligibly diffracted around buildings. This is because light waves: Your Answer:

are plane polarized

have much longer wavelengths than radio waves

have much shorter wavelengths than radio waves

CORRECT

are amplitude modulated (AM) rather than frequency modulated (FM)

Instructor Explanation:
Remediation: Knight, Chapter 22.3 Points Received:

7.
Question:
(TCO 4) Which of the following types of electromagnetic radiation travels at the greatest speed in vacuum? Your

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