Answer:
The maximum potential difference is 186.02 x 10¹⁵ V
Explanation:
formula for calculating maximum potential difference
![V = \frac{2K_e \lambda}{k}ln(\frac{b}{a})](https://tex.z-dn.net/?f=V%20%3D%20%5Cfrac%7B2K_e%20%5Clambda%7D%7Bk%7Dln%28%5Cfrac%7Bb%7D%7Ba%7D%29)
where;
Ke is coulomb's constant = 8.99 x 10⁹ Nm²/c²
k is the dielectric constant = 2.3
b is the outer radius of the conductor = 3 mm
a is the inner radius of the conductor = 0.8 mm
λ is the linear charge density = 18 x 10⁶ V/m
Substitute in these values in the above equation;
![V = \frac{2K_e \lambda}{k}ln(\frac{b}{a}) = \frac{2*8.99*10^9*18*10^6 }{2.3}ln(\frac{3}{0.8}) =140.71 *10^{15} *1.322 \\\\V= 186.02 *10^{15} \ V](https://tex.z-dn.net/?f=V%20%3D%20%5Cfrac%7B2K_e%20%5Clambda%7D%7Bk%7Dln%28%5Cfrac%7Bb%7D%7Ba%7D%29%20%3D%20%20%5Cfrac%7B2%2A8.99%2A10%5E9%2A18%2A10%5E6%20%7D%7B2.3%7Dln%28%5Cfrac%7B3%7D%7B0.8%7D%29%20%3D140.71%20%2A10%5E%7B15%7D%20%2A1.322%20%5C%5C%5C%5CV%3D%20186.02%20%2A10%5E%7B15%7D%20%5C%20V)
Therefore, the maximum potential difference this cable can withstand is 186.02 x 10¹⁵ V
Answer:
9.8 secs
Explanation:
the ball is in the air so it takes 9.8 secs to get to the ground
Explanation: Newton's first law of motion states that a body at rest remains at rest, or, if in motion, remains in motion at a constant velocity unless acted on by a net external force. This is also known as the law of inertia. Inertia is the tendency of an object to remain at rest or remain in motion.
No,
To emit light an electron has to jump down to a lower energy level but in an electron is unable to go any lower in ground state.