Iam a planet with no solid surface, hot liquid deep inside, and a rocky core at my center. i have rings made of small particles and dust, and 67 known moons. which planet am i?

a. jupiter

b. saturn

c. neptune

d. pluto

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?