Term
| ___ “is the fundamental element that keeps us on the move.” |
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Definition
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Term
| What is the unit of force? |
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Definition
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Term
| “If we move an object from one place to another, we have accomplished ___.” |
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Definition
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Term
What is the equation for work?
What is the unit of work? |
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Definition
Force (F) X Distance (D)
Newton/Meter (or whatever unit distance is in) |
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Term
| 1 Joule is =1 ___/___, which means 1 Joule=___ X ___. So joule is the unit of work. |
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Definition
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Term
What is the equation for power?
What is the unit? |
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Definition
Work/Time or Energy/Time
watt |
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Term
| 1 watt=1 ___/___. So joule is also the unit of ___. So work and energy are ___. |
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Definition
| joule/second; energy; interchangeable |
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Term
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Definition
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Term
| 1 dyne/cm of work or energy=1 ___ |
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Definition
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Term
| A dyne is only a fraction of a ___ |
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Definition
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Term
| “___________ states that every object continues in a state of rest or in uniform motion in a straight line unless a force disturbs the object.” |
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Definition
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Term
| “___ is the property that resists a change in position.” |
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Definition
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Term
| “Newton’s ___ Law describes the relationship among force, mass, and acceleration. We need a force to ___ a mass from its resting position. When the mass moves from its point of equilibrium (resting position) it ____. A ___ causes this acceleration. When a force accelerates a mass, ___ between the mass and the ground reduces the net force” |
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Definition
| Second; push; accelerates; force; friction |
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Term
| “The force of friction is always ___ that of the moving body, that is, resisting a motion, and can be expressed as Ff = μN where μ is the static or kinetic coefficient of ___ for a given set of materials, N is the normal ____ or (usually) weight pressing one object into another, F is ___, and f is ___ force.” |
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Definition
| opposite; friction; force; force; frictional |
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Term
| “___ is a measurement of the amount of matter in an object and is usually quantified in kg on a balance scale “ |
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Definition
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Term
| “___ is the measurement of the gravitational force that pulls a mass toward earth.” |
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Definition
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Term
| Which one is impacted by height or location: weight or mass? |
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Definition
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Term
| “Newton’s ___ Law is also called the law of action and reaction. When an object A exerts a force on object B, the second object exerts the same force against object A.” |
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Definition
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Term
“___ energy is also known as the energy of motion”
-What is an example of this kind of energy? |
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Definition
Kinetic
Radiant energy and sound energy |
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Term
-“___ energy is the energy of storage and is not used in motion”
-What is an example of this kind of energy? |
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Definition
Potential
“a rock sitting at the edge of a cliff. While stationary, the rock has potential energy. Once the rock falls off the edge of the cliff it has kinetic energy” |
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Term
| “The ___________ states that energy cannot be created or destroyed beyond what is already in a system but may be transferred from one place to another or changed from one form to another. ” |
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Definition
| law of conservation of energy |
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Term
| “___ is defined as the rate of mechanical energy converted to sound energy, that is, energy/time.” |
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Definition
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Term
Inverse Square Law:
-“as we double distance from a source, sound energy is reduced by a factor of ___”
-“sound intensity = ___/___, or the ___ ___ of a sphere where r = distance from the source” |
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Definition
| four; sound power/4πr2; surface area |
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Term
| “Sound intensity from a sound source will obey the Inverse Square Law only if the path of the sound is ___, that is, there are no ___.” |
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Definition
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Term
| “The most intense sound that is audible to a normal-hearing human before damage occurs is ___ ___ times greater than the softest sound a human can hear.” |
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Definition
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Term
What are the exponents of these numbers?
1. 1000
2. 10,000
3. 100,000
4. 1,000,000 |
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Definition
1. 10^3
2. 10^4
3. 10^5
4. 10^6 |
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Term
What are the answers to these equations?
1. 10^6 x 10^3=___
2. 10^12/10^2=___ |
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Definition
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Term
| “The reference point for intensity (power/area) “is ___ watts/cm2, which is the lowest intensity a human can hear.” |
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Definition
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Term
| “The maximum intensity that a human can tolerate before there is damage to the hearing mechanism is ___ watt/cm2” |
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Definition
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Term
-Exponent and logarithms are the ___ ___
-“exponent and logarithm are the same as ___ (named after Alexander Graham Bell). For example, if a given ratio = 100,000, then log is __ (equal to the number of zeros) and likewise we have __ bels” |
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Definition
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Term
| we convert bel into ___ units; each unit is called a ___. Saying this differently, there are ___ dB in each bel. Therefore, dB = 10 log of the ___ value over the ___ value: measured value/reference value (10^-16) |
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Definition
| 10; decibel (dB); 10; measured; reference |
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Term
| “The lowest value on the Intensity Level (IL) scale is the ratio of the ___ sound a human can hear compared to the ___, which is also the softest sound a human can hear. In other words, 0 dB IL = 10^–16 watts/cm2/10^–16 watts/cm2 which gives us a ratio of ___” |
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Definition
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Term
| Power = ___ or Pressure =___ |
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Definition
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Term
| “As Power is measured at the ___, and sound pressure can be measured ___ by using a microphone and sound measuring device, it is ___ to measure sound pressure rather than sound power. Sound pressure (SP) is measured using a _______” |
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Definition
| source; anywhere; easier; sound-level meter (SLM) |
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Term
| "The softest sound the human can hear, expressed in dynes/cm2, is ___ dynes/cm2. The reference in μPa (microPascal) is ___ μPascal/cm2. Therefore, 0 dB SPL =____ dynes/cm2 or ___ μpascal/cm2.” |
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Definition
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Term
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Definition
| 20 log of a given pressure/reference pressure |
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Term
-To double the intensity level at the source we use the formula dB = ______
-To double dB SPL you use the equation: _____ |
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Definition
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Term
What are the units for...
1. Area
2. Velocity
3. Acceleration
4. Force
5. Pressure
6. Work
7. Power
8. Intensity |
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Definition
1. cm square and meters squared
2. cm/second and meters/second
3. cm/sec squared and meters/sec squared
4. dynes and newtons
5. dyne/cm squared and N/M squared
6. cm x dyne (erg) or N x M (joules)
7. erg/second or joules/sec
8. intensity=power/area and pressure=force/area |
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Term
| How many ergs does 1 joule equal? |
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Definition
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Term
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Definition
| joule/second; ergs/second |
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Term
| 0.0002 dynes/cm2 =___ μPa/cm2 |
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Definition
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Term
| standard acceleration of gravity =___ m/sec2 |
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Definition
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Term
| speed of sound =___ meters/sec (in air) at standard atmospheric conditions |
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Definition
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Term
| speed of light in a vacuum = 2.9979 × 108 m/sec which equals ___ |
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Definition
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Term
-force of 1 pascal =___ newton/m2
-force of 1 pound (lb) =___ N |
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Definition
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