→ p29892:為什麼不考慮100files...? 04/18 19:01
推 bernachom:那個40好像是打錯的...不過這題我也不會算... 04/18 19:05
suppose we want to use a laptop to send 100 files of approximately 40MB
each to another coumputer over an 11 Mbit/sec Wireless connection. The
laptop battery currently holds 100,000 joules of energy. The wireless
networking card alone consumes 7 watts while transmitting, while the
rest of the laptop always consumes 35 watts. Before each file transfer we
need 10 seconds to choose which file to send. How many complete files can
we transfer before the laptop's battery runs down to zero?
答案上面寫著
傳送一個檔案所需時間：10s + 40MByte/11Mbit/sec=39.1s
傳送一個檔案所需功率：10s * 35w + (39.1-10)s * 40w = 1514J
^^^^
我想問的是哪來的40W ??
這是高銘老師寫再歷屆試題上的
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