A palindrome is a number or a text phrase that reads the same backwards as forwards. For example, each of the following five-digit integers is a palindrome: 12321, 55555, 45554 and 11611. Write a C++ program that reads in a five-digit integer and determines whether it is a palindrome .

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Question:

How many cubic feet per minute of entering air is needed to evaporate 10 lb of water per hour from a rayon, if the air enters at 80 deg F and 25% humidity and leaves at 170 deg F and 55% humidity. The operating pressure is 14.3 psia.
A. 22.54
B. 12.68
C. 23.76
D. 16.28

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Answer:

Step 1

The dry bulb temperature and relative humidity of the inlet air is 80 F and 25%, respectively. The specific volume and humidity ratio at the given parameters is calculated from psychrometric chart. The values are:

Step 2

The dry bulb temperature and relative humidity of the outlet air is 170 F and 55%, respectively. The specific volume and humidity ratio at the given parameters is calculated from psychrometric chart. The values are:

Step 3

The required flow rate is denoted by Q. Then:

Step 4

Hence, option (A) is correct.