Answer:
There are 887.5 number of excess electrons on the each spheres.
Explanation:
It is given that, the force of repulsion between two spheres is, 
We know that the force of attraction or repulsion between charges is given by :
It is assumed that the separation between the spheres is 20 cm or 0.2 m. So,
Let there are n excess electrons that must be present on each sphere. It can be given by using quantization of charge as :
n = 887.5 electrons
So, there are 887.5 number of excess electrons on the each spheres. Hence, this is the required solution.
Answer: University/college
Explanation:
A psychologist is someone who studies the cognitive, emotional, and mental states of people by observing and recording how people relate with each other and their environment.
Most psychologists are found in universities in order to help students who have emotional issues or seeking answers to certain questions.
Explanation:
Note that from Newton's law of motion:
the sum of the positive horizontal forces on an object equals the sum of the negative horizontal forces therefore, the net force on the object is zero.
Also, velocity is constant, acceleration is zero.
F = m × a
= 0 N
This is called thermal energy b.
Each of the particle of the substance is usually in motion and the motion of such produces heat.
And the energy associated with heat is the thermal energy.
Answer: 1,600 seconds
Explanation:
31,360/9.8 = 3,200.
Then divide 3,200/2 = 1,600
