Given Information:
Qin = 8*10 = 80 W
Win = 25 W
Temperature = T2-T1 = 10°C
Required Information:
(a) flow rate of the air = m = ?
(b) fraction of the temperature rise of air = f = ?
Answer:
(a) flow rate of the air m = 0.01044 kg/s
(b) fraction of the temperature rise of air f = 23.8 %
Solution:
(a) The flow rate of the air that fan needs to deliver can be found by
Where the value of specific heat of air is 1005 j/kg.C
m = (80 + 25)/1005*10
m = 0.01044 kg/s
(b) fraction of the temperature rise of air due to fan
ΔT = Q/mCp
ΔT = 25/0.01044*1005
ΔT = 2.38°C
So the fan causes a temperature rise of 2.38°C
f = ΔT/T2-T1
f = 2.38/10
f = 0.238 = 23.8 %
Answer:
The answer to this question can be given as :
Expression:
play_list[ k : j + 1]
Explanation:
In the question, it is given that variable k and j is a positive variable and play_list is a variable that is a list type variable that is initialized in the list which has at least the elements of j+1.
The expression for this is play_list[K:j+1]. Where play_list is used the k to ':' slicing in j+1.
Safe Mode thats what your looking for
When you modify or delete data present in a database, you are processing the database.