Naomba msaada wa kujibu maswali haya

Naomba msaada

1. Planet X has a mass thrice that of the earth and radius four times that of the earth. Calculate the weight of 80 kg mass on that planet

2. A spaceship is 1012 Km from a certain star. The force of attraction between the spaceship and star is 50 N. Calculate the distance between them, if th

1.tumia Kepler law

2.F=(GMm^2) /r^2