Answer:
The 59th element is Praseodymium it's symbol is Pr.
For a box with a total surface area of 1.2 m2, the thermal conductivity of the insulating material is mathematically given as
k=5.29*19^{-6} kcal/(s oC m)
<h3>What is the thermal conductivity of the insulating material?</h3>
Generally, the equation for the is mathematically given as
P=Ka dT/L
Therefore
k=10*4*10^{-2}/1.2*1.5
k=5.29*19^{-6} kcal/(s oC m)
In conclusion, the thermal conductivity
k=5.29*19^{-6} kcal/(s oC m)
Read more about Energy
brainly.com/question/13439286
Answer:
a) always. b) electric field lines are defined by the path positive test charges travel.
Explanation:
By convention, field lines always follow the direction that it would take a positive test charge (small enough so it can´t disrupt the field created by a charge distribution), under the influence of an electric field, at the same point where the test charge is located.
So any positive charge, subject to an electric field influence, moves along the field line that passes through its current position, in the same way that a positive test charge would.
We could say also that the electric force on a positively charged particle is in the same direction as the electric field that produces that force (due to some charge distribution) , which is true, but it doesn´t explain why.
Kenzi LOl why do you ask?
Answer:
You meant "Negative-charged rod"?
If you did then here's the answer.
Away.
Explanation:
Since, the rod and Balloon both are negatively charged, and we know that like charges repel each other so, the electrons in the rod tend to move away from negatively charged balloon.