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Author Question: A 1.1-kg uniform bar of metal is 0.40 m long and has a diameter of 2.0 cm. When someone bangs one ... (Read 36 times)

EAugust

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on: Jul 29, 2018
A 1.1-kg uniform bar of metal is 0.40 m long and has a diameter of 2.0 cm. When someone bangs one end of this bar, a 1.5 MHz shock wave is travels along the length of the bar and reaches the other end in 0.12 ms.
 
  What is the wavelength of the shock wave in the metal? A) 2.2 mm
  B) 2.6 mm
  C) 3.0 mm
  D) 3.4 mm
  E) 3.8 mm

Question 2

Two sources emit beams of light of wavelength 550 nm. The light from source A has an intensity of 10 W/m2,
 
  and the light from source B has an intensity of 20 W/m2. This is all we know about the two beams. Which of the following statements about these beams are correct? (There could be more than one correct choice.)
  A) Beam B carries twice as many photons per second as beam A.
  B) A photon in beam B has twice the energy of a photon in beam A.
  C) The frequency of the light in beam B is twice as great as the frequency of the light in beam A.
  D) A photon in beam B has the same energy as a photon in beam A.
  E) None of the above statements are true.
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Koolkid240

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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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EAugust

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Reply 2 on: Jul 29, 2018
Excellent

xiazhe

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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