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mylen [45]
3 years ago
5

Suppose that a wireless link layer using a CSMA-like protocol backs off 1ms on average. A packet’s link and physical layer heade

rs are always set at the same bitrate and take a total of 125us to transmit. If a packet is sent with a link layer payload of 1000 bytes at a bitrate of 1Mbps, what overhead do the physical and link layers introduce? Calculate overhead as the fraction of the complete packet time taken up by backoff and link/physical layer headers.
Engineering
1 answer:
Liula [17]3 years ago
5 0
Tell me why i got this question got it right and now won’t remember but i’ll get back at you when i remember
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2 years ago
A belt drive was designed to transmit the power of P=7.5 kW with the velocity v=10m/s. The tensile load of the tight side is twi
Leviafan [203]

Answer:

F₁ = 1500 N

F₂ = 750 N

F_{e} = 500 N

Explanation:

Given :

Power transmission, P = 7.5 kW

                                      = 7.5 x 1000 W

                                      = 7500 W

Belt velocity, V = 10 m/s

F₁ = 2 F₂

Now we know from power transmission equation

P = ( F₁ - F₂ ) x V

7500 = ( F₁ - F₂ ) x 10

750 =  F₁ - F₂

750 = 2 F₂ - F₂      ( ∵F₁ = 2 F₂ )

∴F₂  = 750 N

Now F₁ = 2 F₂

        F₁ = 2 x F₂

        F₁ = 2 x 750

        F₁ = 1500 N   ,   this is the maximum force.

Therefore we know,

F_{max} = 3 x F_{e}

where F_{e} is centrifugal force

 F_{e} = F_{max} / 3

                          = 1500 / 3

                         = 500 N

8 0
3 years ago
A remote village on an island was devastated by a typhoon. Farmland was flooded and the crops
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Answer:

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Explanation:

hope this helps

6 0
3 years ago
Scanning the road can be thought of as
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Answer:

Observational Skills

Explanation:

Observing the area also known as scanning the scene

5 0
3 years ago
Read 2 more answers
Initialize the tuple team_names with the strings 'Rockets', 'Raptors', 'Warriors', and 'Celtics' (The top-4 2018 NBA teams at th
Drupady [299]

Answer:

#Initialise a tuple

team_names = ('Rockets','Raptors','Warriors','Celtics')

print(team_names[0])

print(team_names[1])

print(team_names[2])

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Explanation:

The Python code illustrates or printed out the tuple team names at the end of a season.

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