A single-shell-sixteen-tube heat exchanger having overall heat transfer conductance of 300 W/m^2?K is used to cool 250 kg/min of ethyl alcohol from 80ºC to 40ºC. Water at 15ºC is used as the coolant and its flow rate is 300 kg/min. Determine the required surface area.
What will be an ideal response?
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What is not true about the interstellar gas?
A: it's what all stars and planets are made of B: it has very few atoms in each small volume C: it's primarily Helium D: it's an important component in a whole galaxy E: it contains information about the evolution of a galaxy
Single-Slit Diffraction: When light of wavelength 450 nm falls on a single slit of width 0.30 mm, what is the angular width of the central bright region?
A. 0.086° B. 0.13° C. 0.17° D. 0.26° E. 0.35°
Neon atoms in a glass tube can be excited
A) once per atom. B) repeatedly. C) by infrared light.
The acceleration due to the Earth's gravity, in English units, is 32 ft/s2. In the absence of air friction, a ball is dropped from rest. Its speed on striking the ground is exactly 60 miles/hr. For what time interval was the ball falling? (There are 5280 feet in one mile.)
A. 5 s B. 2.75 s C. 4.125 s D. 6.1 s