Olbor

From which formula Can I calculate it?

Hey guys! I'm new here, so firstly- hello! I've a exercise to from Metrology. Evaluate measurement uncertainty for the following measurement: 1. Measurement quantity: length of a bar L = 500 mm 2. Material of the measuring object: steel 3. Temperature range in the measuring room: 14 to 26 °C 4. Measurement instrument: Micrometer; digital (resolution 0,001 mm) - Uncertainty of calibration: U = 2 µ m + 4 × 10-6 × L 5. Temperature difference between the measurement object and the measurement instrument:DT = 2 °C I have problem because I'm now on exchange, and this is my first time with Metrology. I didn't had any lectures, practice and etc. In internet I found a lot of things about that, but with another excercise I don't know how to use this data. I'm waiting for any help!