Prof. kopp is working on an experiment located in an abandoned mine near duluth, mn. the experiment is located approximately 713 m below the surface. he went to visit the site this last summer and took a harrowing ride in a bumpy, claustrophobic elevator down to the cavern. he timed the ride to last about 90 s. compute the average speed of the elevator (in mph) as it plummeted to the bottom of the shaft.

The average speed of the elevator going down in the abandoned mine is 17.722mph.

Explanation:

If the elevator takes 90 seconds to descend a height of 713m, the average speed of the elevator is:

And if 1m/s is 2.23694mph, the average speed is:

.

the results is a decrease in air temperature with an increase of altitude.

explanation:

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day