Answer:
1–
Explanation:
The fluorine is the element with biggest electronegativity in the periodic table, so it usually always take an electron and gets charge 1–
Answer:
14 N
Explanation:
The tension in the second string is puling both the masses of 20 kg and 8 kg with acceleration of 0.5 m s⁻²
So tension in the second string = total mass x acceleration
= 28 x .5 = 14 N . Ans..
Answer:
A star uses fusion as an energy source by building larger atoms from smaller atoms.
Explanation:
Nuclear fission and fusion are two processes at which an atomic nucleus is changed to produce energy. Fission is the process splitting heavy atomic into lighter atomic nuclei.
So, fusion is the combination of smaller atoms to form larger atoms and star uses this as source of energy.
Fusion is the process at which light atomic nuclei are merged or fused together to form heavier nuclei.
The energy source for all stars is nuclear fusion. In a nuclear fusion reaction, the nuclei of two atoms combine to create a new atom. Most commonly, in the core of a star, two hydrogen atoms fuse to become a helium atom.
The magnitude of the change in potential energy is equal to the kinetic energy,
or
Here, V is potential difference, q is charge, m is mass and v is velocity.
We can also write,
Given 
Substituting this value with mass of proton, 
and charge of proton,
we get
Therefore, the speed of proton is 
.
Answer:
0.000099T
Explanation:
For a circular coil the flux through a single turn changes by :
∆ = BAcos45° - BAcos90°
= BA cos 45°
During the interval of ∆t = 0.0165s
For N turn, Faraday's law gives the magnitude of emf as follows :
/E/= / -N BAcos45°/ ÷ ∆t
Since the loops are circular the area A of each loop is equal to πr square
B = /E/ ∆t ÷ Nπr square cos45°
= 0.042V × 0.0165/ 800 × 3.142 × 0.063^2 cos 45°
= 0.000693/7
= 0.000099T
= 9.9×10^-5T
