A stream of warm water is produced in a steady-flow mixing process by combining 1.0 kg/s of cool water at 25 °C with 0.8 kg/s of hot water at 75 °C. During mixing, heat is lost to the surroundings at the rate of 30 kJ/s. What is the temperature of the warm water stream? Assume the specific heat of water is constant at 4.18 kJ/(kg·K).

Explanation:

The given data is as follows.

      = 0.8 kg/s = 800 g,      

      = 1 kg = 1000 g,   = (75 - T),

      = T - 25

Now, according to the law of conservation of energy,

      + 30000

      250.8 - 3.34T = 4.18T - 104.5 + 30

          T =

              =

Thus, we can conclude that temperature of the warm water stream is .

the expression 15n + 2(3p) represents the amount isaiah spent buying gasoline and snacks, where n represents the price of each gallon of gasoline and p represents the cost of each snack that he bought. which statement is true about the amount isaiah spent?

i believe the answer is a