Foundations Of Physics Flashcards

1
Q

What are the 6 SI base units?

A
Mass (kg)
Length (m)
Time (s)
Current (A) 
Temperature (K)
Amount of substance (mol)
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2
Q

What is the prefix for x10^-12

A

Pico (p)

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3
Q

What is the prefix for x10^-9?

A

Nano

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4
Q

What is the prefix for x10^-6

A

Micro

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5
Q

What is the prefix for x10^-3?

A

Milli (m)

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6
Q

What is the prefix for x10^-2?

A

Centi (c)

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7
Q

What is the prefix for x10^-1

A

Deci (d)

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8
Q

What is the prefix for x10^3

A

Kilo (k)

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9
Q

What is the prefix for x10^6?

A

Mega (M)

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10
Q

What is the prefix for x10^9?

A

Giga (G)

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11
Q

What is the prefix for x10^12?

A

Tera (T)

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12
Q

What is accuracy?

A

Results close to the true value

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13
Q

What is precision?

A

Results are close to each other

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14
Q

What are systematic errors?

A

A series of errors in accuracy that are consistent caused by a problem that is consistent through an entire experiment

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15
Q

What are random errors?

A

Errors caused by random and unpredictable variation, normally cause anomalies

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16
Q

What do you do when you add or subtract two values with uncertainties?

A

Add the absolute uncertainties

17
Q

What do you do when you multiply or divide values with uncertainties?

A

Add the % uncertainties

18
Q

What are the uncertainties for a mean work out from a table of repeats?

A

=range/2

19
Q

% uncertainty =

A

Uncertainty
—————— x100
Value

20
Q

Percentage difference=

A

Experimental value-accepted value
————————— x100
Accepted value

21
Q

How can you check the homogeneity of an equation?

A

Convert both sides of an equation to SI base units and if they are both the same it is homogeneous

22
Q

What is a scalar quantity?

A

A quantity with magnitude but no direction

23
Q

What is a vector quantity?

A

A quantity with both magnitude AND direction

24
Q

What are the equations for resolving component of a vector quantity?

A

Fx=Fcos(angle)

Fy=Fsin(angle)