Consider a flat plate that is 25 mm long, 30 mm wide, and 1 mm thick and a 50 mm long cylinder with the same volume as the plate
. Compare the heat transfer of the plate in parallel air flow to the heat transfer of the cylinder in cross flow under the same conditions. Both the plate and cylinder have a surface temperature of 80°C. The air is at 25°C with a velocity of 3 m/s. Note: Use the Churchill and Bernstein correlation to determine the Nusselt number for the cylinder case.
1 answer:
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Answer:
(a) The power input to the compressor:
(b) The volume flow rate of the refrigerant at the compressor inlet:
Explanation:
(a)
We need to check the values of enthalpy (as we have an open system) for both states, being the inlet, state 1 and the outlet, state 2. We will know these values by checking the vapor charts of R134a, I used the ones found in Thermodynamics of Cengel, 7th edition.
Then, our values are:
Now we proceed to know the work with the following expression:
Now we replace values and our result is:
(b)
To know the volume rate at the compressor inlet, we need to know the specific volume in that phase, as we have that is saturated and at -24°C, we can read our table:
With our specific volume and the mass rate, we can calculate the volume rate:
Answer:
I am writing a Python function unique()
def unique(list): # function unique that takes a list as parameter
unique_list = [] #list to store unique elements
for elements in list: # loop that checks every element of the list
if elements not in unique_list: # takes unique elements from list
unique_list.append(elements)
#appends unique elements from list to unique_list
return unique_list #outputs unique_list elements
Explanation:
The unique() function takes a list as argument which is named as list.
unique_list is a new list which stores unique element from the list.
The loop moves through the elements of the list one by one.
if condition checks if the element in list is not present in the unique_list which means that element is unique to the unique_list.
If this condition is true this means that the element is not repeated and is not already present in unique_list. Then that element is included to the unique_list using append() function which appends an element into the unique_list from the list.
If you want to check if this function works you pass a list with repeated elements to this function so that it can print the unique elements as follows:
print(unique([1,2,2,2,2,3,4,4,4,4,4,5]))
Output:
[1, 2, 3, 4, 5]
The screen shot of the function along with its output is attached.
Answer:
attached below is an example of the form
Explanation:
This type of form-fill can be described/developed based on the requirements or information needed by the organization in order to perfectly fulfill an order and also to retain customers by making the form very easy and interactive attached below is an example of such form fill interface
