1) See attached figure
The relationship between charge and current is:
where
i is the current
Q is the charge
t is the time
Therefore, the current is the rate of change of the charge passing through a given point over time.
This means that for a graph of charge over time, the current is just equal to the slope of the graph.
For the graph in this problem:
- Between t = 0 and t = 2 s, the slope is
therefore the current is
i = 25 A
- Between t = 2 s and t = 6 s, the slope is
therefore the current is
i = -25 A
- Between t = 6 s and t = 8 s, the slope is
therefore the current is
i = 25 A
The figure attached show these values plotted on a graph.
2)
The previous equation can be rewritten as
This equation is valid if the current is constant: if the current is not constant, then the total charge is simply equal to the area under a current vs time graph.
Here we have the current vs time graph, so we gave to find the area under it.
The area of the first triangle is:
While the area of the second square is
So, the total area (and the total charge) is
Answer:
<em> 30720 oscillation.</em>
Explanation:
Frequency: This can be defined as the number of oscillation completed in a seconds. The S.I unit of frequency is Hertz.
<em>From the question,</em>
<em>The frequency of the string set is 512 Hz,</em>
<em>These means that the spring set complete 512 oscillation in one seconds</em>
<em>I.e</em>
<em>if its completes in one seconds 512 oscillation.</em>
<em>Then, in one minutes, it will complete x oscillation.</em>
<em>x = 512×1min/1seconds</em>
<em>But 1 minutes = 60 seconds</em>
<em>x = 512×60/1</em>
<em>x = 30720 oscillation.</em>
<em />
kinetic energy is Movement energy
think of it like the Xbox Kinect
Answer: (a). ΓL = 0.246 < 75°
(b). S = 1.7
(c). Zin = (30-j)λ
(d). jreal = Arc Po = 0.105λ
(e). jmax = jreal = 0.105λ
Explanation:
attached is a document to help in understanding.
So we will begin with a step by step analysis of the problem.
from the diagram we have that ZL = (50 + j25) Ω.
where ZL = ZL / Z₀ = 50 + j25 / 50 = 1 + j0.5
so we mark this on the chart as point 'P'
(a) ΓL = mP/m 'P' < Θ L = 1.7/6.9 < 75°
ΓL = 0.246 < 75°
(b) This s-circle 's' is given thus s = r = 1.7 on the RHS of the chart
S = 1.7
(c) we are to calculate the input impedance;
ζin = Q = 0.6 - j0.02
therefore Zin = Z₀ζin = 50(0.6 - j0.02) = (30-j)λ
Zin = (30-j)λ
(d) here we are taking R as the diameter opposite of Q on the s=circle
so R = γin = 1.7 + j0.02
yin = yo (γin) = (1.7+j0.02) / 50 = (34 + j0.4)ms
yin = (34 + j0.4)ms
(e) move from 'p' on s-circle to 'o'
where maximum impedance = Znxl = Zos
which gives jreal = Arc Po = 0.105λ
(f) jmax = jreal = 0.105λ
cheers i hope this helps
Answer:
Explanation:
The full definition of a computer is
A computer is a machine(electronic device) that can be programmed to accept data (input), process it into useful information (output), and store it away (in a secondary storage device) for safekeeping or later reuse.
It is not necessary that a computer have network capacity, as far as it can process data into information, accept input and store results.
The correct option is A