What is sonar ? How is it used to find the depth of the ocean?
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The invention of sonar changed the way that the seafloor is mapped. A combined transmitter and receiver, called a transducer, sends a sound pulse straight down into the water. ... The depth of the ocean is calculated by knowing how fast sound travels in the water (approximately 1,500 meters per second).
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ᴛʜᴇ ɪɴᴠᴇɴᴛɪᴏɴ ᴏꜰ ꜱᴏɴᴀʀ ᴄʜᴀɴɢᴇᴅ ᴛʜᴇ ᴡᴀʏ ᴛʜᴀᴛ ᴛʜᴇ ꜱᴇᴀꜰʟᴏᴏʀ ɪꜱ ᴍᴀᴘᴘᴇᴅ. ᴀ ᴄᴏᴍʙɪɴᴇᴅ ᴛʀᴀɴꜱᴍɪᴛᴛᴇʀ ᴀɴᴅ ʀᴇᴄᴇɪᴠᴇʀ, ᴄᴀʟʟᴇᴅ ᴀ ᴛʀᴀɴꜱᴅᴜᴄᴇʀ, ꜱᴇɴᴅꜱ ᴀ ꜱᴏᴜɴᴅ ᴘᴜʟꜱᴇ ꜱᴛʀᴀɪɢʜᴛ ᴅᴏᴡɴ ɪɴᴛᴏ ᴛʜᴇ ᴡᴀᴛᴇʀ. ... ᴛʜᴇ ᴅᴇᴘᴛʜ ᴏꜰ ᴛʜᴇ ᴏᴄᴇᴀɴ ɪꜱ ᴄᴀʟᴄᴜʟᴀᴛᴇᴅ ʙʏ ᴋɴᴏᴡɪɴɢ ʜᴏᴡ ꜰᴀꜱᴛ ꜱᴏᴜɴᴅ ᴛʀᴀᴠᴇʟꜱ ɪɴ ᴛʜᴇ ᴡᴀᴛᴇʀ (ᴀᴘᴘʀᴏxɪᴍᴀᴛᴇʟʏ 1,500 ᴍᴇᴛᴇʀꜱ ᴘᴇʀ ꜱᴇᴄᴏɴᴅ)..
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