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Physics > Skills > Flashcards

Skills Flashcards

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1
Q

What does the prefix tera signify?

A

10^12

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2
Q

What does the prefix giga signify?

A

10^9

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3
Q

What does the prefix mega signify?

A

10^6

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4
Q

What does the prefix kilo signify?

A

10^3

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5
Q

What does the prefix milli signify?

A

10^-3

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6
Q

What does the prefix micro signify?

A

10^-6

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7
Q

What does the prefix nano signify?

A

10^-9

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8
Q

What does the prefix pico signify?

A

10^-12

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9
Q

What is absolute uncertainty?

A

The actual amount by which the quantity is uncertain

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10
Q

What is percentage uncertainty?

A

Absolute uncertainty divided by the mean quantity given as a percentage

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11
Q

What is accurate data?

A

Data that close to the true value

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12
Q

What is precise data?

A

Data that has little variation from the mean

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13
Q

What is repeatable data?

A

Data where the same experimenter gets the same results with the same equipment and method

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14
Q

What is reproducible data?

A

Data where a different experimenter gets the same result with the same method

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15
Q

What is resolution?

A

Smallest change in a quantity that can be measured by a measuring instrument

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16
Q

What are the uses of graphs?

A
  • Extrapolating data that could not be gathered
  • Estimating unknown quantities
  • Identifying anomalies
  • Identifying trends
17
Q

What is an order of magnitude estimate?

A

An estimate which is in the same power of 10 as the real value

18
Q

What are the 7 SI units?

A

Mass - kg
Length - m
Time - s
Temperature - K
Amount of substance - mol
Current - A
Luminous intensity - Cd (candela)

19
Q

What are random errors?

A

Unpredictable variation between measurements that leads to a spread of values about the true value

20
Q

How could random errors be reduced?

A
  • Taking at least 3 repeats and then a mean
  • Use computers or data loggers to reduce human error and enable smaller intervals
  • Use appropriate equipment with a high resolution
21
Q

What are systematic errors?

A

Error that causes readings to differ from the true value by a fixed amount

22
Q

How could systematic errors be reduced?

A
  • Calibrate apparatus by measuring a known value to easily identify systematic errors
  • Taring digital meters before use
  • Read measurements at eye level to avoid parallax error

Physics (4 decks)

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