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How many centimeters per inch?
2.5 centimeters = 1 inch
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What are the "Le Systeme Internation d'Unites." (SI) units of measurement?
Meter (m) for length, kilogram (kg) for mass, second (s) for time.
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What are the CGS units of measurement?
Centimeter (cm) for length, gram (g) for mass, second (s) for time.
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What are the British Engineering syste (BE) units of measurement?
Foot (ft) for length, slug (sl) for mass, second (s) for time.
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Definition of a meter?
The distance light travels in a vacuum in a time of 1/299,792,458 of a second.
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Definition of a kilogram?
The mass of a standard cylinder of platinum iridium.
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Definition of a second?
The time needed for 9,192,631,770 electronic wave cycles of cesium- 133.
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Define base units:
Units used along with various laws to define additional units for other physical quantities.
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Define derived units:
Units for physical quantities that are combinations of the base units.
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What are the standard prefixes used to denote multiples of ten?
- tera (T) 10^12
- giga (G) 10^9
- mega (M) 10^6
- kilo (k) 10^3
- hecto (h) 10^2
- deka (da) 10^1
- deci (d) 10^-1
- centi (c) 10^-2
- milli (m)10^-3
- micro (μ) 10^-6
- nano (n) 10^-9
- pico (p) 10^-12
- femto (f) 10^-15
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Define dimension:
Physical nature of a quantity and the unit used to specify it.
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Sine theta (sin θ) =
Opposite over hypotenuse (ho / h)
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Cosine theta (cos θ) =
Adjacent over hypotenuse (ha / h)
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Tangent theta (tan θ) =
Opposite over adjacent (ho / ha)
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Theta (θ) =
- Inverse sine of opposite over hypotenuse, (arc sin), sin-1 (ho / h)
- Inverse cosine of adjacent over hypotenuse, (arc cos), cos-1 (ha / h)
- Inverse tangent of opposite over adjacent, (arc tan), tan-1 (ho / ha)
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Define Pythagorean Theorem:
The square of th elength of the hypotenuse of a right triangle is equal to the sum of the squares of the lengths of the other two sides (h2 = ho2 + ha2)
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Define scaler (A):
- Quantity with a magnitude
- Quantitiy that can be described with a single number, including any units
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Define vector (A>):
- Quantity with a magnitude and direction
- Quantity that deals inherently with both magnitude and direction
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Define scaler components:
A point on the x (Ax) and y (Ay) axis equal in quantity to the corresponding x and y vectoer components
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Define vector components:
The x (Vector>x) and y (Vector>y) elements of a vector that run parallel to the x and y axis and when aded are egual to the vector
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Define unit vector (uˆ)
Vector that has a magnitude of 1 but no dimensions
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