You are Here: Home >< GCSEs

# Help with science coursework - percentage error of equipment Watch

1. I need to calculate the percentage uncertainty of some equipment from my science coursework.
I know the calculation is - percentage uncertainty/actual measurement x 100

So the percentage uncertainty is something like 0.1 and the actual measurement is what you have actually recorded during the practical. So for example, if you are calculating the percentage error for a measuring cylinder, would the 'actual measurement' be of the volume of water used, or the actual purpose of the experiment which was to heat some water for three minutes using a lamp?

Can you calculate the percentage uncertainty of the following:
Digital Stopwatch (00m00ms) -
Metre Ruler (100cm) -
Digital thermometer (00.00 c) -
Measuring cylinder (10cm3) -
Calculator - does this count??

And what is the 'actual measurement' I divide by? Is it the same for each one?

Thank you. I have finished my coursework but am trying to improve my marks so my teacher recommended researching this but i dont understand

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: June 21, 2016
Today on TSR

### What is the latest you've left an assignment

And actually passed?

### Simply having a wonderful Christmas time...

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Useful resources

## Study tools

### Essay expert

Learn to write like a pro with our ultimate essay guide.

See where you can apply with our uni match tool

### Make study resources

Create all the resources you need to get the grades.

### Create your own Study Plan

Organise all your homework and exams so you never miss another deadline.

### Resources by subject

From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

### Find past papers

100s of GCSE past papers for all your subjects at your fingertips.

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.