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Author Question: A radar receiver indicates that a pulse return as an echo in 20 s after it was sent. How far away is ... (Read 35 times)

sdfghj

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on: Jul 29, 2018
A radar receiver indicates that a pulse return as an echo in 20 s after it was sent. How far away is the reflecting object? (c = 3.0  108 m/s)
 
  A) 1.5 km
  B) 3.0 km
  C) 6.0 km
  D) 9.0 km

Question 2

Consider two pipes of the same length: one pipe is open at both ends and the other pipe is closed on one end but open at the other end.
 
  If the fundamental frequency of the totally open pipe is 300 Hz, what is the fundamental frequency of the other pipe? A) 150 Hz
  B) 300 Hz
  C) 450 Hz
  D) 600 Hz
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Gabe

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Reply #1 on: Jul 29, 2018
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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sdfghj

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Reply 2 on: Jul 29, 2018
Gracias!

xiaomengxian

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Reply 3 on: Yesterday
Wow, this really help

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