In another experiment with springs, a large wave travels 10.2 m along a spring in 5.3 seconds. Approximately how much time would it take a small ripple to travel the same distance? * 1.9 seconds 4.9 seconds 5.3 seconds 10.2 seconds

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?