Two CSMA/CD stations are trying to transmit a few big video files. After each frame is sent, they contend for the channel using the binary exponential back-off algorithm. What is the probability that the contention ends on Round k, and what is the mean number of rounds per contention period?

Acompressor compresses a gas, a pump compresses a liquid. for a given pressure ratio, why does it take more work to compress a gas in a compressor than a liquid in a pump? a)- for a given pressure ratio the average specific volume for a gas is much higher than the average specific volume for a liquid. b)- there is no difference. the only difference is the amount of heat generated (not work) c)- for a given pressure ratio the average volume for a gas is much higher than the average volume for a liquid. d)-there is no difference.