Answer:
Due to polarization of charges on either side the dielectric, it produces an electric field of its own which acts in a firection opposite to that of the field due to the source.
Answer:
In the air
Explanation:
There are three states of matter:
- Solids: in solids, the particles are tightly bond together by strong intermolecular forces, so they cannot move freely - they can only vibrate around their fixed position
- Liquids: in liquids, particles are more free to move, however there are still some intermolecular forces keeping them close to each other
- Gases: in gases, particles are completely free to move, as the intermolecular forces between them are negligible
For this reason, it is generally easier to compress/expand the volume of a gas with respect to the volume of a liquid.
In this problem, we are comparing water (which is a liquid) with air (which is a gas). From what we said above, this means that the change in volume is larger in the air rather than in the water.
The wavelength of the note is

. Since the speed of the wave is the speed of sound,

, the frequency of the note is

Then, we know that the frequency of a vibrating string is related to the tension T of the string and its length L by

where

is the linear mass density of our string.
Using the value of the tension, T=160 N, and the frequency we just found, we can calculate the length of the string, L:
Answer:
The magnitude of the electric field is 512171146711.7046 N/C.
The direction is toward the electron as electron has negative charge.
Explanation:
e = Charge of electron = 
r = Radius of circular orbit = 
= Permittivity of free space = 
The Electric field is given by

The magnitude of the electric field is 512171146711.7046 N/C.
The direction is toward the electron as electron has negative charge.
They both provide a range of years of an object. I think. They’re just 2 different ways to tell the age of fossils or rocks