1) Earths distance from the sun is 1.6 x 10"m and has a period of 1 year to orbit the sun. Pluto's distance from the sun is 5.8 x 102 m from the sun. What is Pluto's period?

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?