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love-tree 08-05-2016 03:48 PM

Teachers plz "Need help " echo
 
Person stood between two mountains he hear two echo the first after 2 second, and the second after 2 second from the first echo
Calculate the distance between two mountains when velocity of sound in air equal 340m/s

خالد ابو بكر المظالى 10-05-2016 06:49 PM

زمن الصدى الاول ز1 = 2 ث
زمن الصدى الثانى ز2 = 2+2 4 ثوانى

ف1 =ع× ز1 /2 = 340 ×2 / 2 = 340 م
ف2 = ع ×ز2 /2 = 340 ×4 / 2 = 680 م

ف=ف1 + ف 2 = 340 + 680 = 1020 م

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