Which is a common refrigerant for domestic air conditioners?
2 answers:
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Given that,
The output signal at the receiver must be greater than 40 dB.
Maximum amplitude = 1
Bandwidth = 15 kHz
The power spectral density of white noise is
Power loss in channel= 50 dB
Suppose, Using DSB modulation
We need to calculate the power required
Using formula of power
Put the value into the formula
For DSB modulation,
Figure of merit = 1
We need to calculate the input signal
Using formula of FOM
Put the value into the formula
We need to calculate the transmit power
Using formula of power transmit
Put the value into the formula
We need to calculate the needed bandwidth
Using formula of bandwidth for DSB modulation
Put the value into the formula
Hence, The transmit power is 3 kW.
The needed bandwidth is 30 kHz.
Answer:
a) specific impulse = 203 s
(b) mass flow rate = 2511 kg/s
(c) throat diameter = 0.774 m
(d) exit diameter = 1.95 m
(e) thrust = 5.3*10^6 N/m^2
(f) thrust at sea level = 15.6*10^6 N
(g) thrust with hydrogen = 5*10^6 N
(h) thrust with stagnation = 5*10^6 N
Explanation:
See the attached file for explanation.
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.
