The orbital radius of the Earth (the average Earth-Sun distance) is 1.496 × 1011 m. Mercury’s orbital radius is 5.79 × 1010 m and Pluto’s is 5.91 × 1012 m. Calculate the time required for light to travel from the Sun to each of the three celestial bodies

Earth: , Mercury: , Pluto:

Explanation:

The light travels at a constant speed of approximately meters per second. The time (), in seconds, required for light to travel a given distance is:

(1)

Where:

- Travelled distance, in meters.

- Speed of light, in meters per second.

Now, we calculate the time for light to travel to each planet:

Earth (, )

Mercury (, )

Pluto (, )

b would be the answer

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s