Arocket ship travels 14,000 miles per hour. what is the rocket ship's velocity in m/s in correct scientific notation? (1 km = 0.62 mi) a. 6.3 × 10^3 m/s b. 0.627 × 10^3 m/s c. 630 × 10^6 m/s d. 6.3 × 10^5 m/s

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?