C2 (Foundation of Physics)

Question 1

Uncertainty is caused by what

Answer 1

Random and systematic errors

Question 2

If you have more than one uncertainty what do you do

Answer 2

Combine them

Question 3

Systematic error

Answer 3

(including zero errors) are the same every time you repeat the experiment (they shift all the values by the same amount)

Question 4

What could cause systematic error

Answer 4

Caused by the equipment and how it’s set up

Question 5

Random errors

Answer 5

They vary, they’re what make the results a bit different each time

Question 6

What can be done to reduce random errors

Answer 6

Using more sensitive apparatus

Repeating measurements

Question 7

How do you combine uncertainties when adding or subtracting data

Answer 7

Add the absolute uncertainties

Question 8

How do you combine uncertainties when multiplying or dividing data

Answer 8

Add the percentage uncertainties

Question 9

How do you combine uncertainties when raising to a power

Answer 9

Multiply the percentage uncertainty by the power

Question 10

Scalar examples

Answer 10

Mass
Time 
Speed 
Temperature
Energy 
Length

Question 11

Vector examples

Answer 11

Displacement
Force 
Velocity 
Acceleration
Momentum