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​Q11: Question – Paper 3 – June 2019
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11)
In May 2019, the distance between Earth and Mars was 3.9 x 107 km.

 

In May 2019, a signal was sent from Earth to Mars.

Assuming that the signal sent from Earth to Mars travelled at a speed of 3 x 105 km per second,

 

a) how long did the signal take to get to Mars?

[2 marks]​​

The speed of the signal sent from Earth to Mars in May 2019 was actually less than 3 x 105 km per second.

 

b) How will this affect your answer to part (a)?

[1 mark]​​