I i dont even know where to start o_O

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To monitor global warming, researchers measure ocean temperatures by analyzing sound pulse travel times underwater. At a depth of 1000 m, where temperatures are stable at around 4°C, sound speed is critical for these measurements. The sound speed increases with temperature, but specific values are missing from the discussion, such as the average sound speed and the rate of increase per degree Celsius. The smallest detectable time change of 1.0 s raises questions about the corresponding temperature change that can be accurately measured. Clarifying these missing details is essential for a complete understanding of the experiment's methodology.
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i need help! i don't even know where to start o_O

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?
 
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Is something missing from the question?
like: "The average sound speed is _____."

and: "...the sound speed increases _____ for every 1.0C increase in temperature."
 

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