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Author Question: It is possible to hear an approaching train before you can see it by listening to the sound wave ... (Read 250 times)

joesmith1212

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on: Aug 6, 2020
It is possible to hear an approaching train before you can see it by listening to the sound wave through the track. If the elastic modulus is 2.0 × 1011 N/m2 and the density of steel is 7.8 × 103 kg/m3, approximately how many times faster is the speed of sound in the track than in air? (vair≈ 340 m/s.)

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20

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5

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10

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15

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25
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Marked as best answer by joesmith1212 on Aug 6, 2020

chereeb

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Reply #1 on: Aug 6, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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joesmith1212

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Reply 2 on: Aug 6, 2020
Great answer, keep it coming :)

xiaomengxian

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Reply 3 on: Yesterday
:D TYSM

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