Physics, 02.03.2020 18:08 ccompassimvu
Problem 3: Thermal expansionThe steel rod has the length 2 m and cross-section area 200 cm2at the room temperature 20◦C. Weapply the heat source and the temperature of the rod increases. The coefficient of linear expansion isα= 2×10−6K−1.a) What is the new length of the rod if the temperature jumps to 80◦C?b) What is the percentage of the volume change of the rod?c) What is the maximal temperature we can allow if the volume should not increase by more thanhalf percent?
Answers: 3
Physics, 22.06.2019 17:40
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Physics, 22.06.2019 22:00
Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?
Answers: 1
Problem 3: Thermal expansionThe steel rod has the length 2 m and cross-section area 200 cm2at the ro...
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