SHS 311 - EXAM 1
From question to perfection| Study with confidence!
Inertia - Answer: in explaining vibration, the mass represents _______
Elasticity - Answer: in explaining vibration, the spring represents __________
Cycle - Answer: vibration pattern that repeats itself
Period - Answer: time it takes to complete one cycle
Frequency - Answer: - number of cycles per second
- reciprocal of the period
Units of frequency - Answer: Hz
1 - Answer: if the period is in s, frequency in Hz is ?/period
1000 - Answer: if the period is in ms, frequency in Hz is ?/period
Amplitude - Answer: - peak
- the maximum distance moved in the positive direction (amount of displacement)
Peak amplitude - Answer: longest distance an object moves in the positive direction
(biggest displacement from 0)
Peak to peak amplitude - Answer: total distance between highest and lowest value
D(t)=A Sin (2*pi*f*t*theta) - Answer: equation for sinusoidal vibration
APPHIA – Crafted with Care and Precision for Academic Excellence. 1
, Root mean square - Answer: in this form of averaging amplitudes, each individual
amplitude is
- squared and added together
- mean of squared amplitudes is calculated
- square root of mean is taken
Starting phase - Answer: The relative starting position of the vibrating object
- given in degrees
Theta - Answer: symbol for starting phase
Density - Answer: number of molecules per unit area
(number of molecules / area)
Pressure - Answer: force per unit area
(mass x acceleration, or Force / area)
Pressure and acceleration - Answer: pressure is proportional to ______ and ______
Decreases - Answer: As altitude increases, air pressure ________
Condensation - Answer: region of increased pressure caused by the outward motion of the
source (air particles are close together in a ring)
Rarefaction - Answer: region of decreased pressure caused by the inward motion of the
source
(space between rings of air particles)
APPHIA – Crafted with Care and Precision for Academic Excellence. 2
From question to perfection| Study with confidence!
Inertia - Answer: in explaining vibration, the mass represents _______
Elasticity - Answer: in explaining vibration, the spring represents __________
Cycle - Answer: vibration pattern that repeats itself
Period - Answer: time it takes to complete one cycle
Frequency - Answer: - number of cycles per second
- reciprocal of the period
Units of frequency - Answer: Hz
1 - Answer: if the period is in s, frequency in Hz is ?/period
1000 - Answer: if the period is in ms, frequency in Hz is ?/period
Amplitude - Answer: - peak
- the maximum distance moved in the positive direction (amount of displacement)
Peak amplitude - Answer: longest distance an object moves in the positive direction
(biggest displacement from 0)
Peak to peak amplitude - Answer: total distance between highest and lowest value
D(t)=A Sin (2*pi*f*t*theta) - Answer: equation for sinusoidal vibration
APPHIA – Crafted with Care and Precision for Academic Excellence. 1
, Root mean square - Answer: in this form of averaging amplitudes, each individual
amplitude is
- squared and added together
- mean of squared amplitudes is calculated
- square root of mean is taken
Starting phase - Answer: The relative starting position of the vibrating object
- given in degrees
Theta - Answer: symbol for starting phase
Density - Answer: number of molecules per unit area
(number of molecules / area)
Pressure - Answer: force per unit area
(mass x acceleration, or Force / area)
Pressure and acceleration - Answer: pressure is proportional to ______ and ______
Decreases - Answer: As altitude increases, air pressure ________
Condensation - Answer: region of increased pressure caused by the outward motion of the
source (air particles are close together in a ring)
Rarefaction - Answer: region of decreased pressure caused by the inward motion of the
source
(space between rings of air particles)
APPHIA – Crafted with Care and Precision for Academic Excellence. 2
