Sound travels about 750 miles per hour. if you stand in a canyon and sound a horn, you will hear an echo. suppose it takes about 4 seconds to hear the echo. how far away is the canyon wall, in feet? (hint: the distance to the canyon wall is half the distance the sound travels)

The answer to your question is:         d = 0.417 mi

Explanation:

Data

Speed of sound = 750 mi/h

time = 4 seconds

distance = ?

Formula

               s = d / t

time = 2 seconds because in 2 seconds the sounds goes goes from me to the canyon and in two seconds it comes back.

Convert 2s to hours

                             3600 s 1 h

                                    2 s    x

                                   x = (2 x 1)/3600

                                   x = 0.00056 h

Substitution

                         d = v x t

                         d = 750 mi/h x 0.00056 h

                        d = 0.417 mi

wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2