A note is played on a guitar. Next, a lower note is played on the guitar. Which of these statements describes the lower note? A: The second note vibrated faster.
B: The second note vibrates at a higher frequency.
C: Both notes vibrated at the same speed.
D: The second note vibrated slower..

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?