The boiling point of water decreases with altitude. At an altitude ℎ metres above sealevel, the boiling point of water is approximately 100 — 𝑇 degrees C where 𝑇 satisfiesthe equation 𝑇2 + 244𝑇 − ℎ = 0What is the boiling point when ℎ = 1500 metres?
Question
The boiling point of water decreases with altitude. At an altitude ℎ metres above sealevel, the boiling point of water is approximately 100 — 𝑇 degrees C where 𝑇 satisfiesthe equation 𝑇2 + 244𝑇 − ℎ = 0What is the boiling point when ℎ = 1500 metres?
Solution
Para resolver el problema, primero necesitamos encontrar el valor de que satisface la ecuación cuadrática dada:
Dado que metros, sustituimos este valor en la ecuación:
Ahora, resolvemos esta ecuación cuadrática usando la fórmula general para ecuaciones cuadráticas :
En este caso, , y . Sustituimos estos valores en la fórmula:
Calculamos el discriminante:
Entonces, la ecuación se convierte en:
Sabemos que , así que:
Esto nos da dos soluciones:
Dado que representa una temperatura, descartamos la solución negativa. Por lo tanto, .
Finalmente, la temperatura de ebullición del agua a una altitud de 1500 metros es:
Por lo tanto, la temperatura de ebullición del agua a 1500 metros de altitud es aproximadamente 94 grados Celsius.
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