Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics👩🏾‍🔬🚀 > Measurements And Errors > Flashcards

Measurements And Errors Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

What is the prefix factor of pico?

A

10^-12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the prefix factor for Tera

A

10^12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Prefix factor of Giga?

A

10^9

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is bigger deci or centi?

A

Deci because it is 10^-1 and centi is 10^-2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Millimetre is M or m

A

m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the derived unit of frequency?

A

Hz (Hertz)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the equation of frequency?

A

1/T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the base unit of frequency?

A

1/s or s^-1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the equation of pressure?

A

Force/Area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the derived unit of pressure?

A

Pa (Pascals)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the base unit of pressure?

A

Kgm^-1s^-2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Is the base unit for mass kg or g

A

Kg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Is the base unit for length m or cm

A

m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the derived unit for work and energy?

A

Joules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the base unit for kinetic energy?

A

Kgm^2s^-2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Base unit for velocity squared?

A

m^2s^-2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Base unit for acceleration?

A

ms^-2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What does homogeneous equations mean?

A

Units on the left side of the equation are the same as the right

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What does precision mean?

A

How close the results are to eachother

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What does accuracy mean?

A

How close the results are to the real value

21
Q

Real value : 3.25

Experimental values : 4.12 4.11 4.13

Are these values precise or accurate?

A

Precise but low accuracy

22
Q

What is random error?

A

A statistical error that is unpredictable and affects the measurements

23
Q

Can random errors be controlled?

A

No because they are unpredictable

24
Q

Give an example of a random error

A

Environment

Change in mass

Not reading equipment efficiently - parallax error

25
Q

What is systematic error

A

An error that effects all the variables in the same way

26
Q

Which error affects the gradient?

A

Random

27
Q

Give an example of systematic error

A

Zero error - when what is being measured doesn’t start at 0

28
Q

Give an example of systematic error

A

Zero error - when the what is being measured doesn’t start at 0

29
Q

How do you work out absolute uncertainty?

A

Half the range

30
Q

What is the absolute uncertainty of a device?

A

The smallest reading/scale on the device

31
Q

What is the Absolute uncertainty of a 15cm ruler with the smallest reading of 1mm

A

0.15m +- 0.001m

32
Q

What is the uncertainty of 7.89kg

A

0.01kg

33
Q

What is the uncertainty of 4.63748 V

A

0.00001V

34
Q

How do you work out % uncertainty?

A

Uncertainty
—————— x100
Value

35
Q

When combining uncertainties do you add or subtract

A

Add NEVER subtract

36
Q

When adding or subtracting quantities what do you do first?

A

Add the absolute uncertainties first

37
Q

When multiplying or dividing quantities what do you do first?

A

Add the percentage uncertainties first

38
Q

How do you work out the uncertainty of a quantity raised to the power?

A

Multiply the power by the % uncertainty

39
Q

What do error bars show?

A

Absolute uncertainty

40
Q

How do you work out the %U of a gradient?

A

Best gradient - worst gradient _______________________________. X100

         Best gradient
41
Q

How do you reduce random errors?

A

By taking multiple measurement and averaging the result

42
Q

How do you reduce systematic error?

A

Calibrate the equipment

Conduct experiment in a stable environment

Warm up instruments

Eliminate zero error

43
Q

Repeatable experiment

A

The same person repeats the experiment and obtains the same result

44
Q

Reproducible experiment

A

An experiment repeated by a different person and different equipment and obtain the same result

45
Q

Resolution

A

The smallest change in quantity on a measuring equipment that causes a noticeable change in reading

46
Q

How do you work out an uncertainty with a constant?

A

Multiply the absolute uncertainty by the constant

47
Q

What is a reading?

A

When one value is found

48
Q

What is a measurement?

A

The difference between two readings

49
Q

How do you work out the uncertainty of a reading?

A

Half the smallest division

Physics👩🏾‍🔬🚀 (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions