Suppose a 512kbps point-to-point link is set up between the Earth and a rover robot on the Mars. The closest distance between the Earth and the Mars is 55Gm (55*10^9 m), and data travels in speed of light (3*10^8 m/s).

a) calculate the minimum RTT for the link.

b)the rover is taking a picture of 5MB and sending the picture back to the Earth. Assuming there is not transmission error or other latency, how quickly after the picture is taken can it reach the Earth?

c) the rover uses 4GHz frequency to transmit the picture. The rover’s transmission power is 200W. The transmission antenna gain is 10,000 and the receiving antenna gain is 100,000. What is the received signal strength at the Earth’s station, in W (assume Pi = 3.14)?

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What side length would you specify if you were required to create a regular hexagonal plate that was composed of 33 cm(squared) of sheet metal? dimension the side length to 0.1 cm

Creating "smart interfaces" in all sectors of industry, government, and the public arena is one of the fastest growing hct areas. these interfaces model, interpret, and analyze such human characteristics as speech, gesture, and vision. the field of biometrics, in which humans authenticate themselves to machines, is an area of considerable interest to hct practitioners. fingerprint scans are one of the most frequently used biometric options, and this article, biometric student identification: practical solutions for accountability & security in schools, makes a case for the implementation of fingerprint scans in schools. critique the article, and answer the following questions: according to the author, what are the main benefits of adopting fingerprint scans in schools for student identification? according to the author, what are the main drawbacks of adopting fingerprint scans in schools for student identification? do you agree with the author's assessment of the pl