Answer:
Electric field at a point ( x , y , z) is 
.
Explanation:
Given :
Electric potential in the region is , 
We need to find the electric field .
We know , electric field , 
{ Here r is distance }
In coordinate system ,
{ 
is partial derivative }
Putting all values we get ,
Hence , this is the required solution.
Answer:
By the experiences, ideas of origin, power and modern empiricism.
Explanation:
The route of the psychology has been recorded by the history of India, Middle East, Europe and China. The Confucius and Buddha focused on the ideas origin and the power. The ancient Hebrews, Aristotle and Pluto tells the idea whether the body with the mind is connected or it is distinct and this connection or distinct idea is the result of experiences.
Locke offers his theories about the mind that mind as the blank state, on which the experience writes. The modern empiricism idea has been developed by Bacon and Locke
When a layer of cold air close to the ground is covered by a layer of warmer air, sound waves traveling upward may be bent, or refracted, by the difference in temperature and redirected toward the ground.
Explanation :
It is given that,
Mass of the car, m = 1000 kg
Force applied by the motor, 
The static and dynamic friction coefficient is, 
Let a is the acceleration of the car. Since, the car is in motion, the coefficient of sliding friction can be used. At equilibrium,
So, the acceleration of the car is 
. Hence, this is the required solution.
