If human beings ever travel to a planet whose mass and radius are both twice that of the earth?

If a person who goes to another planet whose mass and radius is twice as compared to that of earth, then the weight of that person would be half of his original weight which is on this planet.

So if the weight of a person is 60 kg on Earth, then if that person travels on another planet whose mass and radius is double of that of earth, his weight double be 30 kg on that planet which is half his real weight.

b. niger

explanation:

answer; (d) melting of sea ice;