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Author Question: A hot air balloon along with its cargo has a mass of 4.0 105 kg, and it holds 7.0 105 m3 of hot ... (Read 109 times)

Starlight

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on: Jul 29, 2018
A hot air balloon along with its cargo has a mass of 4.0  105 kg, and it holds 7.0  105 m3 of hot air. It is floating at a constant height in air with a density of 1.29 kg/m3. What is the density of the hot air in the balloon?
 
  A) 1.4 kg/m3
  B) 0.72 kg/m3
  C) 0.57 kg/m3
  D) 0.86 kg/m3
  E) 0.43 kg/m3

Question 2

At what rate are photons emitted by a 50.0-W sodium vapor lamp if it is producing monochromatic light of wavelength 589 nm?
 
  (c = 3.00  108 m/s, h = 6.626  10-34 J  s)
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Kdiggy

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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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Starlight

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Reply #2 on: Jul 29, 2018
Thank you!


Kdiggy

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Reply #3 on: Jul 29, 2018
Always glad to help...


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