Which of the following planets has the largest orbital radius?
a. venus
c. neptune
b. earth
d. saturn?

Neptune

Explanation:

In the solar system, there are 8 planets. The arrangement of planets in order from closest to farthest from sun is:

Mercury

Venus

Earth

Mars

Jupiter

Saturn

Uranus

Neptune

The planets revolve around Sun in elliptical orbit. The planet closest to the sun would have smallest orbital radius and the planet farthest from the sun would have largest orbital radius. Thus, Neptune which is the last planet of the solar system has the largest orbital radius.

the answer is d. 4

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at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.