The change in entropy of a mass m of a solid substance which has a latent heat of fusion L and melts at a temperature T is

a. LT/m
b. mL ln(T)
c. mLT
d. mL/T
e. L/mT


D

Physics & Space Science

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A shell and tube heat exchanger consists of one shell with 100 thin-walled tubes of 15 mm diameter in a double pass arrangement. The total surface area is 45 m^2 and the overall heat exchanger conductance is 200 W/m^2?K. Water enters the tubes at 15ºC and 6.5 kg/s. Hot gases having properties of air at 200ºC and 5 kg/s flow through the shell. Determine (a) gas outlet temperature and (b) water outlet temperature.

What will be an ideal response?

Physics & Space Science

One application of _________is as an exhaust gas oxygen sensor.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

A 2.00 kg mass is attached to a spring with a spring constant of 48.0 N/m. If the maximum speed of the mass in this system is 1.14 m/s, what is the energy of the quanta of energy in this system?

A) 2.23 × 10-34 J B) 6.63 J C) 6.63 × 10-34 J D) 5.17 J E) 5.17 × 10-34 J

Physics & Space Science

A nutritionist in the United States measures food energy in units of

A) kilocalories. B) Calories. C) both are the same D) neither of the above

Physics & Space Science