"A turtle takes 3.5 minutes to walk 18 m toward the south along a deserted highway. A truck driver stops and picks up the turtle. The driver takes the turtle to a town 1.1 km to the north with an average speed of 12 m/s. What is the magnitude of the average velocity of the turtle for its entire journey

Explanation:

The given data is as follows.

        Velocity of truck = 12 m/s

The turtle has moved in 18 m towards south direction. After that, the truck picks up the turtle towards 1100 m north.

Hence, total displacement will be as follows.

            1100 m - 18 m = 1082 m in the north direction

Time taken by the turtle is 3.5 minutes. Converting time into seconds as follows.

                   = 210 sec

And, the time taken by the truck is as follows.

              = 91.67 sec

Therefore, the total time will be calculated as follows.

                  210 sec + 91.67 sec

                 = 301.67 sec

Now, we will calculate the average velocity as follows.

       Average velocity =

                                  = m/s

                                  = 3.586 m/s

Thus, we can conclude that average velocity of the turtle for its entire journey is 3.586 m/s.

continuous conducting path for current, power supply

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.