Two identical capacitors store different amounts of energy: capacitor A stores 2.0 x 10-3 J, and capacitor B stores 1.8 x 10-4 J. The voltage across the plates of capacitor B is 12 V. Find the voltage across the plates of capacitor A.

39.9 V

Explanation:

Given that

Capacitor are indentical that is why the value of C will be same for both the capacitor.

We know that energy stored in the capacitor is given as

V=Voltage

C=Capacitance

For A :

E₁= 2 x 10⁻³ J

Voltage = V₁

For B :

E₂=1.8 x 10⁻⁴ J

V₂ = 12 V

Now by using above two equation

Therefore the voltage on capacitor A will be 39.9 V

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min