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Author Question: A heat engine receives 7000 J of heat and loses 3000 J in each cycle. What is the efficiency of this ... (Read 49 times)

Arii_bell

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on: Jul 29, 2018
A heat engine receives 7000 J of heat and loses 3000 J in each cycle. What is the efficiency of this engine?
 
  A) 30 B) 43 C) 57 D) 70

Question 2

The radius R of a nucleus of mass number A is given by R = R0 A1/3, where R0 = 1.2  10-15 m,
 
  calculate the density of a nucleus that has contains 57 protons and 82 neutrons. The mass of a nucleon (proton or neutron) is 1.67  10-27 kg.
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joechoochoy

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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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Arii_bell

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Reply 2 on: Jul 29, 2018
Gracias!

debra928

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Reply 3 on: Yesterday
Wow, this really help

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