What is a shell and tube heat exchanger?
What will be an ideal response?
A shell and tube heat exchanger is used to describe any heat exchanger which
has a shell, or container in which are arranged tubes for exchanging heat
between a hot fluid and a cold fluid.
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A single slit, which is 0.050 mm wide, is illuminated by light of 550 nm wavelength. What is the angular separation between the first two minima on either side of the central maximum?
A) 0.36° B) 0.47° C) 0.54° D) 0.63° E) 0.73°
Which of the following statements about degeneracy pressure is not true?
A) Degeneracy pressure keeps any protostar less than 0.08 solar mass from becoming a true, hydrogen-fusing star. B) Degeneracy pressure can halt gravitational contraction of a star even when no fusion is occurring in the core. C) Degeneracy pressure is a consequence of the laws of quantum mechanics. D) Degeneracy pressure varies with the temperature of the star.
In a double slit experiment, the slit separation is constructed to be exactly 4 times the wavelength of the light passing through the slits
At what angles from the center of the pattern will the third bright fringes on both sides of the central fringe occur? A) ±48.6° B) ±75.0° C) ±67.5° D) ±36.9° E) ±43.0°
A weak acid is added to a concentrated solution of hydrochloric acid. Does the solution become more or less acidic?
A) More acidic, since there are more hydronium ions being added to the solution. B) Less acidic, since the solution becomes more dilute with a less concentrated solution of hydronium ions being added to the solution. C) No change in acidity, since the concentration of the hydrochloric acid is too high to be changed by the weak solution. D) Less acidic since the concentration of hydroxide ions will increase.