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Author Question: An air conditioner with a coefficient of performance of 3.50 uses 30.0 kW of power to operate. What ... (Read 62 times)

biggirl4568

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on: Jul 29, 2018
An air conditioner with a coefficient of performance of 3.50 uses 30.0 kW of power to operate. What power is it discharging to the outdoors?
 
  A) 30.0 kW
  B) 75.0 kW
  C) 105 kW
  D) 135 kW
  E) 210 kW

Question 2

A metal having a work function of 2.8 eV is illuminated with monochromatic light whose photon energy is 3.9 eV. What is the threshold frequency for photoelectron production? (h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
 
  A) 7.6  1014 Hz
  B) 8.5  1014 Hz
  C) 2.7  1014 Hz
  D) 9.4  1014 Hz
  E) 6.8  1014 Hz
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katara

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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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biggirl4568

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Reply 2 on: Jul 29, 2018
:D TYSM

helenmarkerine

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Reply 3 on: Yesterday
Gracias!

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