radius of: mass of: Earth =6.38 x 10 m Earth = 5.98 x 1024 kg Jupiter = 7.14 x 10 m Jupiter = 1.91 x 1027 kg Mars = 3.40 x 10 m Mars = 6.43 x 10" kg Mercury = 3.32 x 10" kg Mercury =2.44 x 10 m moon = 7.36 x 1022 kg Neptune =2.43 x 10' m Neptune =1.03 x 1025 kg sun = 7.00 x 10' m Saturn = 5.68 x 10 kg Uranus =2.61 x 107 m sun =1.99 x 1030 kg Venus = 6.05 x 105 m Moon =1.74 x 10' m Uranus = 8.74 x 1025 kg Venus = 4.89 x 1024 kg Moon =7.35 x 102kg distance from Earth to the sun = 1.50 x 10" m distance from Saturn to the sun = 1.43 x 1012 m distance from Earth to the moon = 3.84 x 10' m1. A 250 g mass is placed on a meter stick 15 cm from the fulcrum. An unknown mass is placed 7 cm from the fulcrum to balance the system. What is the mass in kg of the unknown object