In a thundercloud there may be an electric charge of 43 C near the top and −43 C near the bottom. These charges are separated by approximately 1.7 km. What is the magnitude of the electric force between them? The Coulomb constant is 8.98755 × 109 N · m2 /C 2 . Answer in units of N

Explanation:

The magnitude of the electrostatic force between two charged objects is given by Coulomb's law:

where:

is the Coulomb's constant

are the two charges  of the two objects

r is the separation between the two objects

In this problem, the two objects are the two clouds, so we have:

(charge of the 1st cloud)

(charge of the 2nd cloud)

r = 1.7 km = 1700 m (distance between the two clouds)

So the force between them is

So, the magnitude of the force is (neglecting the negative sign which indicates that the force is attractive)

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.

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explanation: