Exercises

Please complete each exercise or answer the question on paper or in Matlab before reviewing the posted solution comments.

1. What is the result of following boolean expression for each pair of values of temp1 and temp2?

   (temp1 > 212 | temp1 < 32) & (temp2 > 212 | temp2 < 32)
   

   temp1	temp2	Result
   70	70	________
   220	70	________
   30	70	________
   70	220	________
   70	30	________
   30	30	________
   220	30	________
   30	220	________

   Here is the completed table.

   temp1	temp2	Result
   70	70	false
   220	70	false
   30	70	false
   70	220	false
   70	30	false
   30	30	true
   220	30	true
   30	220	true

2. What question does the above boolean expression answer?

   It returns true if H₂O is steam or ice at both temp1 and temp2. Another way to phrase this result is: "If it returns false, then H₂0 is water at either temp1 or temp2.

3. Write a boolean expression that returns true if H₂O would be water at temp1 and temp2?

   temp1 <= 212 & temp1 >= 32 & temp2 <= 212 & temp2 >= 32