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Author Question: A swimmer heading directly across a river that is 200 m wide reaches the opposite bank in 6 min 40 ... (Read 34 times)

moongchi

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on: Jul 29, 2018
A swimmer heading directly across a river that is 200 m wide reaches the opposite bank in 6 min 40 s. During this swim, she is swept downstream 480 m. What is the speed of the current?
 
  A) 0.50 m/s
  B) 0.80 m/s
  C) 1.2 m/s
  D) 1.4 m/s
  E) 1.8 m/s

Question 2

How long will it take a 4.50-kBq sample of material to reach an activity level of 0.140 kBq if the half-life of the sample is 435 years?
 
  A) 3245 years B) 1993 years C) 2178 years D) 14,478 years
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Meganchabluk

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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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moongchi

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Reply 2 on: Jul 29, 2018
Excellent

xthemafja

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Reply 3 on: Yesterday
Wow, this really help

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