Recent content by one_q_a_day

I am on the Earth's surface and I want to lift my 1000kg rock up 1m. I quickly calculate the amount of work required to accomplish this feat: 1000kg * 9.81 m/s2 * 1m = 9800 kg m2/s2 or 9800 joules thats really not that much work. i see from...

You're right. Lets say the rod (height: 1m; top area: 100cm2) is made of steel (thermal expansion coefficient: 0.00001/C at 20C; specific heat capacity: 0.5 kJ/kgC; density: 8g/cm3) The rock's mass is 1000kg rod volume = 1m * 100cm2 = 10000cm3 rod mass = 10000cm * 8g/cm3 = 80kg now...

Experiment 1: I have a steel rod . I heat the rod to temperature T. As the rod heats up, it expands to length L. This makes me happy. I let the rod cool down and contract back to its original temperature and dimensions. Experiment 2: Now I place a heavy rock on top of the rod, and heat...