Awave has a wavelength of 9mm and a frequency of 19 hertz. what is its speed? edit: : answer is 171 mm/s

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

For which pair of objects would adding the same a

How many meters will a car travel if its speed is 45 m/s in an interval of 11 seconds? question 2 options: a) 450 meters b) 495 meters c) 4.09 meters d) 498 meters