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| 1. |
The temperature of an isotropic cubical solid of length `L`, density `d` and coefficient of expansion `alpha` is raised by `10^(@)C`. To a good approximation, at final tempertureA. length is `L(1+10alpha)`B. surface area of any face of the cube is `L^(2)(1+20alpha)`C. density is `d(1+30alpha)`D. density is `d//(1+30alpha)` |
| Answer» Use `L=L_(0)(I+alpha t).A=A_(0)(1+2alpha t)` and `d=(d_(0))/(1+3 alpha t)` | |