Let's say two planets are orbiting a star. Planet 1's peirod is 5 times Planet 2's period. How does planet 1's orbital radius compare with planet 2's orbital radius?

ice to water 1 water to vapour 2 latent heat

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

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