You are hiking to the top of a small canyon. when you stop for a rest you decide to shout “hello” across the canyon. you hear your echo 1.10 s after your shout. if sound waves travel at 340 m/s, how wide is the canyon?

Initially, a particle is moving at 5.33 m/s at an angle of 37.9° above the horizontal. two seconds later, its velocity is 6.11 m/s at an angle of 54.2° below the horizontal. what was the particle's average acceleration during these 2.00 seconds in the x-direction (enter first) and the y-direction?