Este año se cumplirán ciento diez años de la publicación por parte de Albert Einstein del artículo titulado «¿Depende la inercia de un cuerpo de su contenido de energía?» en el que incluía una fórmula que relaciona la masa y la energía, postulando que en realidad son una misma cosa.
Esa fórmula, por supuesto, es la conocida E=mc2, que quiere decir que la energía de un cuerpo en reposo (E) es igual a su masa (m) multiplicada por la velocidad de la luz (c) al cuadrado, y realmente puso patas arriba el mundo de la física.
Si quieres oír al propio Einstein intentando explicarla en poco menos de un minuto, en Einstein Explains the Equivalence of Energy and Matter, mira el siguiente vídeo.
«It followed from the special theory of relativity that mass and energy are both but different manifestations of the same thing — a somewhat unfamiliar conception for the average mind.
Furthermore, the equation E is equal to m c-squared, in which energy is put equal to mass, multiplied by the square of the velocity of light, showed that very small amounts of mass may be converted into a very large amount of energy and vice versa.
The mass and energy were in fact equivalent, according to the formula mentioned above. This was demonstrated by Cockcroft and Walton in 1932, experimentally.»
Kris! I’m so glad you touched on thyroid health. I’m a 28 year old thyroid cancer survivor and I didn’t know what the heck my thyroid was until my doctor felt a lump and began doing a variety of tests and biopsies on mine when I was 18! 10 needle biopsies later and cancer was the diagnosis. It’s so important for all people, especially women, to understand what their thyroid is and how the endocrine system effects so many other physical and emotional systems in the body! That became VERY evident when I was off my thyroid meds for cancer testing – 3 months without a thyroid (it was surgically removed) and no thyroid meds and my body was a MESS!
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