(a) calculate the distance that light travels in 0.5 seconds, and express the answer in units of the circumference of the earth. the equatorial circumference of the earth is 4.01 x 10^7 m. (b) now let's calculate how much time is required for light to travel 5 m distance.

a)  3.74 circumference of earth

b)1.67× 10⁻⁸ sec

Explanation:

a) given,

time =  0.5 second

distance = speed  × time

              = 3 x 10⁸ × 0.5  

              = 1.5 × 10⁸ m

circumference of earth = 40075 km

                                       = 4.01 × 10⁷m

distance with respect to circumference=

                                                                 = 3.74 circumference of earth

b) distance = 5 m

time =

        =

        = 1.67× 10⁻⁸ sec

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

more than, less

less than, more