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Author Question: A hockey puck slides off the edge of a platform with an initial velocity of 20 m/s horizontally. The ... (Read 67 times)

cmoore54

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on: Jul 29, 2018
A hockey puck slides off the edge of a platform with an initial velocity of 20 m/s horizontally. The height of the platform above the ground is 2.0 m.
 
  What is the magnitude of the velocity of the puck just before it touches the ground? You can neglect air resistance.
  A) 22 m/s B) 25 m/s C) 24 m/s D) 6.3 m/s E) 21 m/s

Question 2

What was Einstein's main reason for proposing the principle of the constancy of lightspeed?
 
  A) This principle followed from his conclusions regarding the relativity of time and space.
  B) His own observations of such simple phenomena as reflection and refraction convinced him that light must have the same speed for all observers.
  C) The Michelson-Morley experiment showed that every observer observes the same speed for any lightbeam.
  D) He believed that Maxwell's theory of electromagnetism should obey the principle of relativity.
  E) He believed that conservation of energy should be obeyed in every nonaccelerated reference frame.
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juwms

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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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cmoore54

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Reply 2 on: Jul 29, 2018
YES! Correct, THANKS for helping me on my review

jojobee318

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Reply 3 on: Yesterday
Excellent

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