Explanation :
It is given that, q and 4q are placed at a distance of l.
Let x is the distance where third charge is placed so that the entire three charge system is in static equilibrium.
Equilibrium means the net force acting on the system of charges is equal to zero. Let Q is the third charge.
So, ![\dfrac{kqQ}{x^2}=\dfrac{k(Q)(4q)}{(l-x)^2}](https://tex.z-dn.net/?f=%5Cdfrac%7BkqQ%7D%7Bx%5E2%7D%3D%5Cdfrac%7Bk%28Q%29%284q%29%7D%7B%28l-x%29%5E2%7D)
On solving,
![x=\dfrac{l}{3}](https://tex.z-dn.net/?f=x%3D%5Cdfrac%7Bl%7D%7B3%7D)
For magnitude :
![\dfrac{kqQ}{(l/3)^2}=\dfrac{kq4q}{l^2}](https://tex.z-dn.net/?f=%5Cdfrac%7BkqQ%7D%7B%28l%2F3%29%5E2%7D%3D%5Cdfrac%7Bkq4q%7D%7Bl%5E2%7D)
using ![x=\dfrac{l}{3}](https://tex.z-dn.net/?f=x%3D%5Cdfrac%7Bl%7D%7B3%7D)
![Q=\dfrac{4q}{9}](https://tex.z-dn.net/?f=Q%3D%5Cdfrac%7B4q%7D%7B9%7D)
So, a charge of -4q/9 is at a distance of l/3 is placed. It is placed to the right of +q.
B. By vibrations in wires or strings
Answer:
Geometrical representation
ADH binds onto the cells of the collecting duct and makes them more permeable to water, thus more water is reabsorbed by osmosis back into the blood. The blood becomes more dilute and the urine more concentrated
Answer: Potential energy to kinetic energy
Explanation:
Potential energy is the energy by virtue of its position
P.E = mgh
While
Kinetic energy is the energy by virtue of motion.
K.E = 0.5mv^2
At the top of the hill the boulder has maximum height and thereby possess maximum P.E, as it rolls down the hill the height reduces and velocity increases, so the P.E reduces and K.E increases(P.E is directly proportional to height while K.E is directly proportional to velocity). So as the boulder rolls down the hill its potential energy is converted to kinetic energy (according to the rule of conservation of energy).