The wave speed in a guitar string of length 57.5 cm is 266 m/s. you pluck the center of the string by pulling it up and letting go. pulses move in both directions and are reflected off the ends of the string. how many seconds does it take for the pulse to move to the string end and return to the center?

In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.