Question

HUMHA Jungitud inicial de 3.0000 m hasta un valor HUI L cuando se calentó desde 25° C hasta 96° C, 2Cuál será el valor de su longitud final Lr si el coeficiente de expansión lineal es 12.8x10 (1/°C)? 10. Explicar por qué ocurre lo siguiente: Una varilla bimetálica al calentarse, sufre una expansión lineal. En la temperatura inicial (frio) ambos tienen la misma longitud y forma; luego al calentarse se expanden y cambian de forma, como se ve en la figura de abajo. FRIO Extremo - fijo CALIENTE metal 2

10- explain why the following occurs. A bimetallic rod undergoes linear expansion when heated. in the initial twmperature(cold) both have the same lenght and shape; then when heated they exapand and changes shape, as seen in the figure below

7- explain in what consist volumetric expansion

Answer 1

10. The rod undergoes linear expansion when heated. This happens because heated molecules moves faster and take up more space. Heating the rod will displace atoms from their original positions and the displaced atoms forms a new structure. This is known as allotropic phase transformation.

7. Volumetric expansion can be due to :

a. Change in temperature

b. Pressure or Force acting