Answer:
The exit temperature is 293.74 K.
Explanation:
Given that
At inlet condition(1)
P =80 KPa
V=150 m/s
T=10 C
Exit area is 5 times the inlet area
Now
If consider that density of air is not changing from inlet to exit then by using continuity equation
So
m/s
Now from first law for open system
Here Q=0 and w=0
When air is treating as ideal gas
Noe by putting the values
So the exit temperature is 293.74 K.
Answer:
the heat transfer from the pipe will decrease when the insulation is taken off for r₂<
where;
r₂ = outer radius
= critical radius
Explanation:
Note that the critical radius of insulation depends on the thermal conductivity of the insulation k and the external convection heat transfer coefficient h .
The rate of heat transfer from the cylinder increases with the addition of insulation for outer radius less than critical radius (r₂< ) 0, and reaches a maximum when r₂ = , and starts to decrease for r₂< . Thus, insulating the pipe may actually increase the rate of heat transfer from the pipe instead of decreasing it when r₂< .
Answer:
Insert
'try:' at line 1
'except:' at line 3
Explanation:
The "try and except" commands in Python are used for exception handling.
try: the statements under this block are executed normally
except: the the statements under this block are executed when there is an exception.
We can use these commands to handle errors, for example, in the given scenario we don't want the user to enter a floating point number such as
1.5, 2.6 etc.
When the user enters an integer number then the except command is not executed.
When the user enters a floating point number then the except command is executed, program is stopped and error message is shown that is at line 4
Python code:
# line 1
try:
# line 2
age = int(input("Enter your age: "))
# line 3
except:
# line 4
print("Invalid input")
Output:
Test 1:
Enter your age: 20
Test 2:
Enter your age: 20.5
Invalid input
Answer:
true
Explanation:
it is used to describe the family of transit services available to residents of urban area