hopkinsgail569
23.06.2019 •
Physics
The water flowing over niagara falls drops a distance of 50 m. if all the gravitational potential energy is converted to thermal energy, by what temperature does the water rise? the specific heat of water is 4186 j/kg ∙ k. a)0.42 c° b)0.37 c° c)0.12 c° d)0.10 c°
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Ответ:
Answer : (C) 0.12 C°
Explanation :
It is given that all the gravitational potential energy is converted to thermal energy.
So, the thermal energy is balanced by gravitational potential energy.
Gravitational potential energy,
And amount of heat is,
Where, c is specific heat.
So,
or
Hence, this is the required solution.
Correct option is (C) 0.12 C°.
Ответ:
Del enunciado tenemos lo siguiente:
Una persona toma 4.5L de agua por día.Sabemos que un año tiene 365 días, por lo que dicha persona bebe anualmente:
4.5 x 365 = 1642.5L de agua anualmente
Sabemos que 1m³ equivale a 1000L, por lo que aplicando regla de tres:
Del enunciado tenemos lo siguiente:
El precio de la botella de agua de 750 ml es de $2500.De esta manera, bebió la siguiente cantidad de botellas:
Entonces, le costo de agua que bebió es: