Explanation:
(i)
O is the object and I is the image.
The image formed is enlarged and it is erect. So the magnification will be positive (+) and greater than 1.
Refer above image. 1
(ii)
O is the object and I is the image.
The image formed is diminished and erect. So the magnification will be positive (+) and less than1.
Refer above image. 2
(iii)
The image will be formed as the 2F on the other side of the lens and it will be of same of the object.
Answer:

Explanation:
We are given that
Atomic number=2
We have to find the total negative charge on the electrons in one mole of Helium.
We know that atomic number=Proton number
Proton number=Number of electrons=2
Number of electrons in Helium=2
1 mole of Helium=
atoms
We know that q=ne
Where n =Number of fundamental units
e=Charge on electron
1 e=
Using the formula

Total negative charge in 1 mole=
Hence, the total negative charge on the electrons in 1 mole of Helium=
Kinetic Energy is defined by 1/2 times the mass times the velocity squared.
KE = (1/2)mv2
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