practical questions stuff (random information)

Question 1

How to calculate percentage absolute percentage uncertainty in repeated data (1 of the ways)

Answer 1

Absolute uncertainty = Range / 2

Question 2

When a piece of equipment of equipment need to take 2 readings to measure what it is measuring what do you do to the absolute uncertainty?

What peices of equipment need to take 2 readings and what need 1 reading to measure what they are ment to measure

Answer 2

The precision of the equipment

Add both uncertaintys together effectively doubling precision of the equipment to find the absolute uncertainty

2 reedings - anything digital (e.g ammeter), measuring distances
1 reading - thermometer

e.g a ruler takes 2 measurements to measur 1 distence as there is a uncertency for aling the 0 to the object as well as a uncertency for measureing the end of the object therefore 2 readings need to be taken (the begining and the end)

Question 3

% uncertency =

Answer 3

absolute uncertaint / value

Question 4

what is the independent veriable

Answer 4

the thing you change (usaly the x axis)

Question 5

what is the dependent veriable

Answer 5

the thing you measure (usaly the y axis)

Question 6

safty procedures for using lassers

Answer 6

• wear goggles

Question 7

safty precedures for using radiocative subsatnces

Answer 7

• wear gloves
• use tongs when moving

Question 8

how to decreaase percentage uncertency

Answer 8

take meausement of larger values

Question 9

when you add or subtract data you what happens to the absalute uncertency?

Answer 9

add the absalute uncertencys

Question 10

when you multiply or divide data what happens to the percentage uncertency?

Answer 10

add the percentage uncertency

Question 11

when rasing data to a power what happens to the percentage uncertency?

Answer 11

multiply the percentage uncertency