Planet Tatoone is about 1.7 AU from its Sun. Approximately how long will it take for light to travel from the Sun to Tatoone in minutes? Use 3 × 108 m/s for the speed of light.

The value is      

Explanation:

From the question we are told that

  The distance of planet Tatoone is  

   The  speed of light is  

Generally the time taken is mathematically represented as

=>

=>    

Now converting to minutes

   =>        

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the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it