Answer:
k = 6.72
Explanation:
K of paper = 3.7
k of air = 1
Given that charge Q on the capacitor is constant because cell is disconnected from the circuit. So
V = Q / C = 2.5
Capacity becomes C / 3.7 in air .
capacity becomes C/3.7 when paper is replaced by air .
V₁ = Q / (C/3.7)
= 3.7 Q/C
3.7 x 2.5
= 9.25 V
In the second case ,
capacitance due to new unknown dielectric k
= C/3.7 x k
= kC / 3.7 ( Capacitance in air is C/3.7 )
V ( new ) = Q / ( kC/3.7 )
= 3.7 Q/kC
.55 x 2.5 = 3.7 x( 2.5 / k )
k = 3.7 / .55
= 6.72
Explanation:
The misunderstanding here is that the thing that turns on the light bulb is not the same electrons near the light switch. So, the electrons near the switch is not moving all the way across the circuit instantly. The electrons are distributed across the wire. When the light switch is turned on, the circuit is connected and there is a potential difference between the bulb and the source. This potential difference creates an electric field, and free electrons move under the influence of this electric field according to Coulomb's Law. When they start to move the electrons closest to the bulb causes the bulb to glow.
So, the important factor here is not the drift velocity of the electrons but the number of electrons and the strength of the electric field.
Answer:
A, B and F are the right answers
Explanation:
The formula is 
A) Increasing both the radius and the speed by a factor of 9
=
<u><em>which means the acceleration will increase by a factor of 9</em></u>
B) Keeping the speed fixed and decreasing the radius by a factor of 9
=
<u><em>which means the acceleration will increase by a factor of 9</em></u>
C) Keeping the radius fixed and increasing the speed by a factor of 9
=
It will increase the acceleration 81 times
D) Keeping the speed fixed and increasing the radius by a factor of 9
=
It will decrease the acceleration by 9 times
E) decreasing both the radius and the speed by a factor of 9
=
It will decrease the acceleration by 9 times
F) Keeping the radius fixed and increasing the speed by a factor of 3
=
<u><em>It will increase the acceleration by 9 times </em></u>
For the first one it’s the guh sound
And the second one it’s the kuh sound
The light particle<span> conceived by Einstein is called a photon. The main point of his </span>light<span> quantum theory is the idea that </span>light's energy is related to its oscillation frequency. <span>Einstein believed </span>light<span> is a </span>particle<span> (photon) and the flow of photons is a </span>wave<span>.</span>