Answer:
A perfectly elastic collision is defined as one in which there is no loss of kinetic energy in the collision. An inelastic collision is one in which part of the kinetic energy is changed to some other form of energy in the collision.
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Answer:
The resistance of the wire after being heated is approximately 1.15 times the resistance before being heated.
Explanation:
The resistance of the wire goes up as the temperature goes up.
By Ohm's law, we have the relationship between the resistance of a conductor R, the current flowing through it, I, and the voltage across it, V,
![V=R~x~I](https://tex.z-dn.net/?f=V%3DR~x~I)
As described, the current through the wire decreases so, to maintain the same voltage, the resistance must increase when the wire is heated. Let's say R1 is the resistance before heating the wire and R2 is the resistance after,
![V=R_{1} x~I_{1} =R_{2}~} x~I_{2}](https://tex.z-dn.net/?f=V%3DR_%7B1%7D%20x~I_%7B1%7D%20%3DR_%7B2%7D~%7D%20%20x~I_%7B2%7D)
Let's solve for R2,
![R_{2} =\frac{I_{1} }{I_{2} }~x~R_{1}](https://tex.z-dn.net/?f=R_%7B2%7D%20%3D%5Cfrac%7BI_%7B1%7D%20%7D%7BI_%7B2%7D%20%7D~x~R_%7B1%7D)
In this case, I1 = 0.3A and I2 = 0.26A,
![R_{2} =\frac{0.3A}{0.26A} ~x~R_{1} =1.15R_{1}](https://tex.z-dn.net/?f=R_%7B2%7D%20%3D%5Cfrac%7B0.3A%7D%7B0.26A%7D%20~x~R_%7B1%7D%20%3D1.15R_%7B1%7D)
Hence, the <u><em>resistance of the wire after being heated is approximately 1.15 times the resistance before being heated.</em></u>
Answer:
We know the information about atomic size, energy, electronic configuration etc. of atom from the periodic table.
Explanation:
- Periodic table is the arrangement of elements that are arranged according to their properties and electronic configuration.
- In periodic table, on furthest right side of the periodic table, noble gases like He, Ne, Ar etc are arranged.
- The atomic number of element increases while moving from left towards right in the periodic table.
- The metallic character of element decreases as we proceed the table towards right.
- They readily accept electron to fill the valence shell hence becoming more metallic in character.