Ch 1-2 Physics Flashcards
X axis that runs side to side or left to right
horizontal
y axis that runs up and down or bottom to top
vertical
when two items have a relationship with one another but not a specific relationship it is called
related or proportional
When two items are not associated it is called
unrelated
When one item increases as another item decreases it is considered
inversely related or inversely proportional
Describes two items that are associated and as one increases, the other also increases
directly related or directly proportional
Scores on the ultrasound board exams are _____ related to studying time
directly
Weight is ______ related to a sonographer’s time spent exercising
inversely
The color of the sky and the size of a person’s pants are
unrelated
Special forms of inverse relationships
reciprocals
When two numbers with a _______ relationship are multiplied together, the result is one
reciprocal
What is the reciprocal of 1000
1/1000 or 0.001
What is the reciprocal of 1/10?
10
What is the reciprocal of 7
1/7
All numerical values should have corresponding
units
Typical units for Length
cm, m (singular)
Typical units for Area
cm^2, ft^2 (squared)
Typical units for volume
cm^3, ft^3 (cubed)
What is not a unit
percent
Increase by a factor of 3 means
multiply by 3
Decreases by a factor of 6 means
divide by 6
A sack contains 4 pounds of sugar. The contents of the sack are increased by a factor of 5. How much sugar is in the bag
20lbs
A forest has 25 trees. The size of the forest is decreased by a factor of 5. How many trees remain
5 trees
Short way to represent very large or very small numbers
scientific notation
A number in scientific notation with a negative exponent has a value that is
less than 1
A number in scientific notation with a positive exponent has a value that is
greater than 10
A number with an exponent of zero has a value
between 1 & 10
Complimentary metric units for billions and billionths
gigo nano
complimentary metric units for thousands and thousandths
kilo milli
complimentary metric units for millions and millionths
mega micro
How many nanoseconds are in 7 seconds
.000000007 seconds
List the metric units in decreasing order Nano Centi Giga Kilo Hector Micro
Giga Kilo Hector Centi Micro Nano
Sound is a
mechanical and longitudinal wave
Effects of the medium upon the sound wave
acoustic propagation properties
What are we talking about when we talk about the media and medium
Biological tissue,what the waves pass through
Effects of the sound wave upon the biological tissue through which it passes
biological
List the 3 acoustic variables
pressure
density
distance
Used to distinguish between sound waves and other types of waves
acoustic variables
What wave do particles move in the same direction that the wave propagates
longitudinal
What wave do particles move in a direction that is perpendicular to the direction that the wave propagates
transverse
Sound is a
longitudinal wave
Sound is comprised of ______ and ______ or areas that increase in pressure or density and decreases in pressure or density
compression and rarefaction
What are a pair of waves considered when their peaks occur at different times, and so do their troughs
out-of-phase
What are a pair of waves considered when their peaks occur at the same time and end at the same time
In-phase
Occurs when a pair of in-phase waves results in the formation of a single wave with a larger amplitude than either of them on their own
constructive interference
Occurs when a pair of out-of-phase waves result in the formation of a single wave with a smaller amplitude than wither original waves
destructive interference
What do waves transfer from one location to another
energy
Waves of different frequencies will create eaves with _____ and ______ interference
constructive and destructive
Period and frequency have
a reciprocal relationship
