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Author Question: On a horizontal frictionless air table, a puck runs into an ideal horizontal spring that is fastened ... (Read 90 times)

Chelseaamend

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on: Jul 29, 2018
On a horizontal frictionless air table, a puck runs into an ideal horizontal spring that is fastened to the table. The puck compresses the spring by 15 cm before coming to rest. During the compression process, which quantities are conserved?
 
  A) only the momentum of the puck
  B) the momentum and the kinetic energy of the puck
  C) only the mechanical energy (kinetic plus potential) of the puck
  D) the momentum and the mechanical energy of the puck
  E) only the kinetic energy of the puck

Question 2

The textbook shows a graph of the history of U.S. energy use since 1950. According to this graph, which of the following resources presently delivers the most energy or energy equivalent annually to the United States?
 
  A) coal
  B) renewable forms such as hydroelectric and solar
  C) conservation, considered as equivalent to an energy resource
  D) oil
  E) nuclear
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Ptupou85

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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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Chelseaamend

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

mohan

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Reply 3 on: Yesterday
Excellent

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