Quiz 2

Question 1

What differentiates a vector quantity from a scalar quantity?

Both have magnitude, and a vector quantity also has [blank]

Answer 1

direction

Question 2

refers to the amount of change from equilibrium position

Answer 2

amplitude

Question 3

refers to a point within the cycle of SHM

Answer 3

phase

Question 4

the number of full cycles of SHM within a period of time

Answer 4

frequency

Question 5

Regarding sound transmission through air, select all of the statements below that are accurate.

Sound can be described as a disturbance or vibrations of the molecules of an elastic medium.
The air molecules that are in a sound wave’s path move in simple harmonic motion.
Attenuation refers to the reinforcement of air molecules displaced over time.
If you could see a sound wave, you would see changes in air molecule density that emanate from the source and follow a path that is parallel to the floor.
Sound propagation causes regions of relatively high and relatively low pressure that alternate over time.

Answer 5

Sound can be described as a disturbance or vibrations of the molecules of an elastic medium.
The air molecules that are in a sound wave’s path move in simple harmonic motion.
Sound propagation causes regions of relatively high and relatively low pressure that alternate over time.

Question 6

Combine two tones of the same frequency, that have the same amplitude and starting phase

Answer 6

the resulting tone will have double the amplitude, period stays the same

Question 7

Combine two tones of the same frequency, that have the same amplitude, and are 180 degrees out of phase

Answer 7

the two tones cancel each other out

Question 8

Combine two tones of the same frequency, that differ in starting phase by something other than 0 degrees or 180 degrees

Answer 8

the resulting tone will have areas of relatively increased and decreased amplitude throughout the cycle, period stays the same