Answer:
-0.79 J
Explanation:
We are given that





We have to find the work done by the electric force on the moving point charge.


Work done,
Where 
Using the formula


His law exaplins/shows that the average distance of a planet from the Sun cubed is directly proportional to the orbital period squared.
Answer:
The height of the image is, h' = 6.0 cm
The image is erect.
Explanation:
Given data,
The object distance, u = -5 cm
The focal length of convex lens, f = 10 cm
The object height, h = 3 cm
The lens formula,



v = -10 cm
The magnification factor of lens

m = 2



h' = 6 cm
The height of the image is, h' = 6 cm
The image is erect.