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Author Question: When is the angular momentum of a system constant? A) Only when its total kinetic energy is ... (Read 124 times)

elizabeth18

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on: Jul 29, 2018
When is the angular momentum of a system constant?
 
  A) Only when its total kinetic energy is constant.
  B) Only when the linear momentum and the energy are constant.
  C) Only when no net external torque is exerted on the system.
  D) Only when the moment of inertia is constant.

Question 2

Mort stands on Earth. Velma moves away from him in a rocket, at 299,000 km/s (1000 km/s slower than lightspeed). Mort sends a laser beam toward Velma. As the tip of the beam passes her rocket, Velma observes that
 
  A) the laser beam moves past her at just 1000 km/s.
  B) the laser beam moves past her at 300,000 km/s.
  C) Both of the above.
  D) the laser beam never catches up with her.
  E) Mort has turned into a giant frog.
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Moriaki

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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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elizabeth18

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Reply 2 on: Jul 29, 2018
Excellent

diana chang

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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