Answer:
im means into
e means out of
Explanation:
Using the definitions of immigration and emigration as points of reference, the following explanation applies.
Both terms are derived from migration which means moving from one place to another.
By further explanation:
The "im" in the definition of immigration means "into" while the "e" in the definition of emigration means "out of"
Burning a substance means that you have damaged it, and this is irreversible, which is a quality that chemical changes have. Burning a substance also changes the substance into ash, which makes it a chemical change as the substance has been formed into something else.
I hope this helps!
Option a; Electric field can accelerate an electron, but never change its speed
An electric field (also known as an E-field) is a physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them. It can also refer to the physical field of a charged particle system. Electric fields are created by electric charges and time-varying electric currents. Electric and magnetic fields are both aspects of the electromagnetic field, one of nature's four fundamental interactions (also known as forces). Electric fields are significant in many areas of physics and are used in electrical technology. In atomic physics and chemistry, for example, the electric field is the attractive force that holds the atomic nucleus and electrons together in atoms. It is also the driving force behind chemical bonds between atoms.
Learn more about Electric field here:
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Answer:
Net force = 13.36 N
Explanation:
Recall the formula for the force between two charges q1 ans q2 separated a distance "d" based on Coulomb's Law:
so, we need to calculate the force exerted on the charge 10 micro Coulombs by the 20 micro-Coulombs charge as they are separated 0.8 meters (haf the distance of the original two charges.
Notice that charges q1 and q3 are both positive charges so the force we obtain will be pointing in the direction towards charge q2. The magnitude of this is:
![F_{13}=k\,\frac{20\,\,10^{-6}\,*\,10\,\,10^{-6}}{0.8^2}=9\,\,10^{9}\,\frac{200\,\,10^{-12}}{0.8^2}= 2812.5 \,\,10^{-3} \,N = 2.8125 \,\,N](https://tex.z-dn.net/?f=F_%7B13%7D%3Dk%5C%2C%5Cfrac%7B20%5C%2C%5C%2C10%5E%7B-6%7D%5C%2C%2A%5C%2C10%5C%2C%5C%2C10%5E%7B-6%7D%7D%7B0.8%5E2%7D%3D9%5C%2C%5C%2C10%5E%7B9%7D%5C%2C%5Cfrac%7B200%5C%2C%5C%2C10%5E%7B-12%7D%7D%7B0.8%5E2%7D%3D%202812.5%20%5C%2C%5C%2C10%5E%7B-3%7D%20%5C%2CN%20%3D%202.8125%20%5C%2C%5C%2CN)
We can calculate now the force exerted by charge q2 on charge q3 using the same reasoning, and noticing that since charge q2 is negative, the force on q3 will be of attraction, then also pointing in the direction towards q2:
![F_{23}=k\,\frac{75\,\,10^{-6}\,*\,10\,\,10^{-6}}{0.8^2}=9\,\,10^{9}\,\frac{750\,\,10^{-12}}{0.8^2}= 10546.875 \,\,10^{-3} \,N = 10.547 \,\,N](https://tex.z-dn.net/?f=F_%7B23%7D%3Dk%5C%2C%5Cfrac%7B75%5C%2C%5C%2C10%5E%7B-6%7D%5C%2C%2A%5C%2C10%5C%2C%5C%2C10%5E%7B-6%7D%7D%7B0.8%5E2%7D%3D9%5C%2C%5C%2C10%5E%7B9%7D%5C%2C%5Cfrac%7B750%5C%2C%5C%2C10%5E%7B-12%7D%7D%7B0.8%5E2%7D%3D%2010546.875%20%5C%2C%5C%2C10%5E%7B-3%7D%20%5C%2CN%20%3D%2010.547%20%5C%2C%5C%2CN)
Now, we need to add both forces to get the final force (recall they are both in the same direction):
Net force = 10.547 N + 2.813 N = 13.36 N