Lecture 1 - Physics In Ultrasound Flashcards

1
Q

A shorthand method

A

Scientific notation

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2
Q

A non-zero # written in scientific notation has the form:

A

N x 10^k

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3
Q

The raise number is called the

A

Exponent

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4
Q

The number 10 is the

A

Base

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5
Q

A number GREATER THAN TEN

A

Positive exponent

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6
Q

A number LESS THAN ONE

A

Negative exponent

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7
Q

A numver between one and ten will have an exponent of

A

ZERO

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8
Q

10(18)

A

Exa - E

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9
Q

10(15)

A

Peta - P

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10
Q

10(12)

A

Tera - T

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11
Q

10(9)

A

Giga - G

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12
Q

10(6)

A

Mega - M

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13
Q

10(3)

A

Kilo - K

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14
Q

10(2)

A

Hecto - H

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15
Q

10(1)

A

Deca - da

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16
Q

10(-1)

A

Deci - d

17
Q

10(-2)

A

Centi - C

18
Q

10(-3)

A

Milli - m

19
Q

10(-6)

A

Micro - u

20
Q

10(-9)

A

Nano - n

21
Q

10(-12)

A

Pico - p

22
Q

10(-15)

A

Femto - f

23
Q

10(-18)

A

Atto - a

24
Q

Every measurement has 2 parts

A

Magnitude & unit

• 100 cm
100 - magnitude
cm - unit of measurement

25
Q

Unit of length:

A

kilometer (km)
meter (m)
centimeter (cm)

26
Q
  • is the perimeter of circle & is also expressed as a unit of length (mm, cm or m)
  • a distance
A

Circumference

27
Q

units of area

A
square meter (m2)
square centimeter (cm2)
28
Q

Units of volume

A
Cubic meter (m3)
Cubic millimeter (mm3)
29
Q

Units of time:

A

Seconds (s)

Milliseconds (ms)

30
Q

Units of speed:

A

Meters per second (m/s)

Millimeters per microsecond (mm/us)

31
Q

Unit of power

A

Watts (W)

32
Q

Unit of work

A

Joule (J)

33
Q

Unit of Acoustic Impedance

A

rayls