Engineering, 06.09.2019 04:30 aaronpmoore4137
Suppose that a wireless link layer using a csma-like protocol backs off 1ms on average. a packet’s link and physical layer headers 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.
Answers: 3
Engineering, 03.07.2019 14:10
Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.
Answers: 2
Engineering, 04.07.2019 18:10
An air conditioning system consist of a 5 cm diameter pipe, operating at a pressure of 200 kpa. the air initially enters the pipe at 15°c with a velocity of 20 m/s and relative humidity of 80%. if the heat supply throughout the process is 960 w, determine the relative humidity and the temperature at the outlet
Answers: 3
Engineering, 04.07.2019 18:10
Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.
Answers: 2
Engineering, 04.07.2019 18:10
Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.
Answers: 2
Suppose that a wireless link layer using a csma-like protocol backs off 1ms on average. a packet’s l...
Mathematics, 11.11.2019 00:31
Mathematics, 11.11.2019 00:31
Mathematics, 11.11.2019 00:31
Mathematics, 11.11.2019 00:31
Mathematics, 11.11.2019 00:31