Acylindrical capacitor is made of two thin-walled concentric cylinders. the inner cylinder has radius 8 mm , and the outer one a radius 12 mm . the common length of the cylinders is 156 m . what is the potential energy stored in this capacitor when a potential difference 7 v is applied between the inner and outer cylinder? (k =1/4∗π∗ϵ0=8.99×109n⋅m2/c2)

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305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures