Sound travels about 1460 meters per second in water. how deep is a wreck on the sea floor if it takes about 4 seconds for a sonar signal to return following transmission? a) 2920 meters b) 1460 meters c) 5840 meters d) 365 meters

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.