Answer:What is the structure of this text and what type of text is it?
The seventeenth century saw the end of the great epidemics of hunger that had periodically threatened the European population in the preceding centuries, and the nineteenth century signified a revolutionary change in medicine - sepsis, vaccines, anesthesia, etc. - whose social applications - hygiene , compulsory vaccination, etc. - determined a rapid drop in the mortality rate, especially infant mortality. The joint action of both factors caused a revolutionary change in the demographic structure of the old continent. The decrease in mortality in the first years decisively increased the percentage of the population reaching reproductive age, and the reduction in that of adults favored the prolongation of the half-life, with the consequent aging of the populations.
Explanation:
Explanation:Answer:Esta es una respuesta certificada
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Las respuestas certificadas contienen información fiable, avalada por un equipo de expertos cuidadosamente seleccionados. En Brainly hay millones de respuestas de alta calidad, que han sido moderadas por los miembros más destacados de nuestra comunidad. Pero las respuestas certificadas son las mejores de las mejores.
Inicialmente debemos calcular la resistencia, para ellos aplicaremos la Ley de Ohm, tenemos:
P = V²/R
R = V²/P
R = (120V)²/40W
R = 360Ω
Una bombilla de 40 W y 120 V tiene un valor de 360Ω.
Ahora, procedemos a calcular el calor, tenemos:
Q = 0.24 · I² · R · t
Q = 0.24 · ( 2A)² · (60 Ω) · (60 s)
Q = 3456 J
Ahora, transformamos de Joule a Kilocalorias, tenemos:
Q = 0.82 Kcal
Q = 820 calorías
Ver más en Brainly.lat - https://brainly.lat/tarea/11380894#readmore
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