Question
At its closest approach, Mars is 56 million $\mathrm{km}$ from Earth. How long would it take to send a radio message from a space probe of Mars to Earth when the planets are at this closest distance?
Step 1
We know that 1 kilometer is equal to 1000 meters. Therefore, the distance in meters is given by: \[56 \times 10^6 \, \text{km} \times \frac{1000 \, \text{m}}{1 \, \text{km}} = 56 \times 10^9 \, \text{m}\] Show more…
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