Working as a Physicist

Question 1

What’s the difference between repeatable and reproducible results?

Answer 1

• If results are repeatable, similar results will be obtained by the same people using the same method and apparatus.
• If results are reproducible, similar results will be obtained by different people using a different method or apparatus.

Question 2

How can validity be improved?

Answer 2

• Control more variables
• Use more precise equipment
• Obtain more results to reduce uncertainty

Question 3

How can you make sure your answer is rounded the same way as the mark scheme?

Answer 3

• Use equations one at a time, rather than putting everything into one combined equation.
• Once you obtain a value from an intermediate calculation, use it as it is to three significant figures.