The answer is Hertz (Hz) named in honor of the German scientist Heinrich Hertz, who first conclusively proved the existence of electromagnetic waves.
<h3><u>Answer;</u></h3>
Argon
<h3><u>Explanation;</u></h3>
- Phosphorus is an element found in group 15 of the periodic table, it is one of the element that belongs to nitrogen family.
- The element phosphorus exhibits allotrophy, namely; white phosphorus, red phosphorus and black phosphorus.
- <u>Phosphorus, particularly the white phosphorus combines with oxygen so easily that it catches fire automatically. Thus, as a safety precaution, white phosphorus is stored under water in laboratories.
</u>
- <u>It may be also stored in argon, since argon is an inert element which belongs to the noble gases group.</u>
Answer:
none no work cuz no motion
Explanation:
GOOD LUCK
Answer:
Explanation:
Given
Four Point charges are Placed at the corner of a square with side length a
Length of diagonal 
Distance of charge from center 
Potential at the center due to four charges is given by
as all the four charges are equal and placed symmetrical about center
Work done required to bring a fifth charge q from infinity to the center of the square
