Lab#6: Propagated Uncertainty in Measurements

Propagated Uncertainty in Measurements

Samuel
Ellis
Mia
9-7-2016

2.

Every experiment have its little error, to avoid these error we have to get a more precise equipment. Or we can use uncertainty measurement to find the error range so we can know what value is our answer lay between.

3. 

To use propagated uncertainty, we first have to know what +- the measurement lay between and we also need to know how to take partial derivative. To calculate uncertainty, we have to find the answer without using uncertainty and then take a square root of double uncertainty(^2), so we get a constant value.

4.

1. Watch lecture online in Moodlerooms about propagated uncertainty.
2. weight metals
3. Measure two different metals using calipers.
4. Determine it uncertainty and record your data.
5. Calculate uncertainty using above data.

5.

We were given two cylindrical shapes metal but in different material and length. Longer one is aluminum and shorter one is iron.(measurement below) 

6.

 we got an equation using square root of doubling everything to get uncertainty for metals. 2nd picture is uncertainty for aluminum. 

7. 

8.

The more accurate we want our data to be, we either need to get more precise measuring tool or use propagated uncertainty to the how much error is our actual answer differ from the most accurate one.
By taking partial derivative, we can find uncertainty.