Answer:
1.44%
Explanation:
The potential energy of a spring is given by
The kinetic energy is
Now x = 12 A
Applying in the first equation
The percentage would be 14400%
at (makes more sense)
The percentage is 25 % of the kinetic energy
Answer:
= 1.46 × 10 ¹⁰ electron
Explanation:
Given that
E, Electric field = 1000N/C
D, Diameter = 29cm
r, radius = 0.145
E = kq/r²
→ q = Er²/k
q = (1000 × (0.145)² ) / (9 × 10⁹)
q = 2.34 × 10⁻⁹C
q = Ne
where e = 1.6 × 10⁻¹⁹
N = (2.34 × 10⁻⁹) / (1.6 × 10⁻¹⁹)
= 1.46 × 10¹⁰ electron
Explanation:
Resistance is defined as the ability of a substance to resist the flow of current through the substance. Formula to calculate resistance is as follows.
R =
As outer surface of a wire is in the shape of sphere. therefore, its area will be as follows.
A =
or, A =
where, d = diameter of the sphere
This means that with increase in diameter of a conductor there will occur an increase in area of the wire. As area is inversely proportional to resistance so, increase in area will lead to a decrease in resistance.
On the other hand, relation between resistivity and temperature is as follows.
where, = resistivity
d = mean free path of electrons
A = amplitude of atomic vibrations
T = temperature
Also, resistivity is directly proportional to resistance. So, with increase in temperature there will occur an increase in resistance of the conductor.
Thus, we can conclude that only technician B is correct.
Uh is this true or false?
If so yeah true a concave lens is a diverging lens.