A compact heat exchanger is proposed to heat tomato juice. The heat exchanger is to be constructed with finned tubes as shown in Figure 9-30, spacing C. The properties of the
The heat exchanger conductance can be determined by noting that it is a composite of
the convection heat transfer coefficient for the air side, the conductance through the
tubes, and the convection heat transfer coefficient of the tomato juice inside the tubes.
The air side convection coefficient is determined from the Stanton number data of
Figure 9-30C.
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A capacitor is designed so that one plate is large and the other is small. If the plates are connected to a battery,
1.the large plate has a greater charge than the small plate. 2.the large plate has less charge than the small plate. 3.the plates have equal, but opposite, charge.
Atomic Nucleus: The primary reason that very large nuclei are unstable is due to
A. the cumulative repulsive force of the protons. B. the cumulative attractive force between the protons and the orbiting electrons. C. the repulsive force between the neutrons and the protons. D. the extreme weakness of the gravitational attraction of the protons.
Most galaxies have remained the same type and size since they formed.
Answer the following statement true (T) or false (F)
In this diagram a force acting on a block is shown by the arrow labeled F. The mass of the block is known, as is the size of the force, but the observed acceleration is larger than F/m and so another force must act on the block. In which direction (A, B, C, or D) is this force?
A. A B. B C. C D. D