A nuclear reaction only involves valence electrons. True or False?
2 answers:
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If we tossed up a coin with some velocity then its acceleration in the air is due to gravity which we can take as a = - 9.8 m/s^2
Also it is given that coin returns to initial position after 4 s
So after 4 s its displacement will become ZERO
now in this process we can say that in whole motion of the coin the net displacement of coin is zero and its acceleration is due to gravity remains constant.
We can use kinematics here
so approximate speed of the coin must be nearly 20 m/s
Answer:
(A)8,421.1 V/m
(B)
(C)
(D)
Explanation:
area (A) = 7.6 cm^{2} = 0.00076 m^{2}
distance (d) = 1.9 mm = 0.0019 m
potential difference (v) = 16 V
(A) electric field (E) = Δv / d = 16 / 0.0019 = 8,421.1 V/m
(B) capacitance = (∈₀A)/d
where ∈₀ = permitivity of free space =
capacitance =
capacitance (C) =
(C) charge (q) = C x v = =
(D) surface charge density = charge (q) / area = / 0.00076 =