A drivers blank affects how likely it is that he or she will take risks behind the wheel.
1 answer:
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Complete Question
The two isolated parallel plate capacitors be- low, one with plate separation d and the other with D > d, have the same plate area A and
are given the same charge Q.
What is the energy in the spark produced by discharging the second capacitor?
1. The same as the discharge spark of the first capacitor
2. More energetic than the discharge spark of the first capacitor
3. Less energetic than the discharge spark of the first capacitor
Answer:
The correct option is 2
Explanation:
The formula for the energy stored in the capacitor is
And generally the formula for finding the capacitance of a capacitor is
We can denote the capacitance of the first capacitor as
and denote the capacitance of the second capacitor as
Looking at this formula we can see that C varies inversely with d
as D > d it means that
Since the charge is constant
i.e U varies inversely with C
So =>
This means that the energy of spark would be more for capacitor two compared to capacitor one
The correct option is 2
Answer:
increases by a factor of
Explanation:
First we need to find the initial velocity for it to stop at the distance 2d using the following equation of motion:
where v = 0 m/s is the final velocity of the package when it stops, is the initial velocity of the package when it, a is the deceleration, and
is the distance traveled.
So the equation above can be simplified and plug in Δs = d, for the 1st case
(1)
For the 2nd scenario where the ramp is changed and distance becomes 2d,
(2)
let equation (2) divided by (1) we have:
So the initial speed increases by . If the deceleration a stays the same and time is the ratio of speed over acceleration a
The time would increase by a factor of