You are Here: Home >< A-levels

# Uncertainity

Announcements Posted on
Why bother with a post grad course - waste of time? 17-10-2016
1. Does anyone know the uncertainty of this equipment:
30 cm ruler
meter ruler
vernier caliper
micrometer
And any others that I would need to know for AQA Physics
2. (Original post by Revision0161)
Does anyone know the uncertainty of this equipment:
30 cm ruler
meter ruler
vernier caliper
micrometer
And any others that I would need to know for AQA Physics
This is just about how accurately you can measure the reading on these instruments.

A 30 cm ruler has an uncertainty of (+-) 1 mm
A micrometer has an uncertainty of (+-) 0.01 mm as you take a length mesurements with it but it has a rotation to counteract uncertainty
A caliper has an uncertainty of (+-) 0.01 mm because it gives you accurate readings for 2.dp
meter ruler has uncertainty of (+-) 1 mm too.
3. Thanks!

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. Oops, you need to agree to our Ts&Cs to register

Updated: June 5, 2016
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:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll

## All the essentials

### Student life: what to expect

What it's really like going to uni

### Essay expert

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

### Create a study plan

Get your head around what you need to do and when with the study planner tool.

### Resources by subject

Everything from mind maps to class notes.

### Study tips from A* students

Students who got top grades in their A-levels share their secrets