Physics Cup – TalTech 2020 Problem 0 – Sheet resistance Hint 1 Problem 1 – Small oscillations of a system in an electric field Hint 1Hint 2Hint 3Hint 4Hint 5ResultsBest solutions Problem 2 – Staircase-like surface of a crystal Hint 1Hint 2Hint 3Hint 4Hint 5 Problem 3 – Thread breaking point Hint 1Hint 2Hint 3Hint 4Hint 5 Problem 4 – Heat flux between plates Hint 1Hint 2Hint 3Hint 4 Problem 5 – Lens position reconstruction Hint 1Hint 2Hint 3Hint 4Hint 5