vincikai
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i need help! i don't even know where to start 
One way to monitor global warming is to measure the average temperature of the ocean. Researchers are doing this by measuring the time it takes sound pulses to travel underwater over large distances. At a depth of 1000 m, where ocean temperatures hold steady near 4C, the average sound speed is . It's known from laboratory measurements that the sound speed increases for every 1.0C increase in temperature. In one experiment, where sounds generated near California are detected in the South Pacific, the sound waves travel 7600 .
If the smallest time change that can be reliably detected is 1.0 s, what is the smallest change in average temperature that can be measured?
One way to monitor global warming is to measure the average temperature of the ocean. Researchers are doing this by measuring the time it takes sound pulses to travel underwater over large distances. At a depth of 1000 m, where ocean temperatures hold steady near 4C, the average sound speed is . It's known from laboratory measurements that the sound speed increases for every 1.0C increase in temperature. In one experiment, where sounds generated near California are detected in the South Pacific, the sound waves travel 7600 .
If the smallest time change that can be reliably detected is 1.0 s, what is the smallest change in average temperature that can be measured?