Thermal Expansion: Find % Change in Density & Metal ID

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Homework Statement


When the temperature of a metal cylinder is raised from 0 degrees C to 100 C,its length increases by 0.23%.

(a) Find the percent change in density.
(b) What is the metal?

Homework Equations


∇L = Lα∇T



The Attempt at a Solution

 
Last edited:
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Thread 'Have I solved this structural engineering equation correctly?'

Thread 'Have I solved this structural engineering equation correctly?'

Hi all, I have a structural engineering book from 1979. I am trying to follow it as best as I can. I have come to a formula that calculates the rotations in radians at the rigid joint that requires an iterative procedure. This equation comes in the form of: $$ x_i = \frac {Q_ih_i + Q_{i+1}h_{i+1}}{4K} + \frac {C}{K}x_{i-1} + \frac {C}{K}x_{i+1} $$ Where: ## Q ## is the horizontal storey shear ## h ## is the storey height ## K = (6G_i + C_i + C_{i+1}) ## ## G = \frac {I_g}{h} ## ## C...
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