Answer:
1.424 μC
Explanation:
I'm assuming here, that the charged ball is suspended by the string. If the string also is deflected by the angle α, then the forces acting on it would be: mg (acting downwards),
tension T (acting along the string - to the pivot point), and
F (electric force – acting along the line connecting the charges).
We then have something like this
x: T•sin α = F,
y: T•cosα = mg.
Dividing the first one by the second one we have
T•sin α/ T•cosα = F/mg, ultimately,
tan α = F/mg.
Since we already know that
q1=q2=q, and
r=2•L•sinα,
k=9•10^9 N•m²/C²
Remember,
F =k•q1•q2/r², if we substitute for r, we have
F = k•q²/(2•L•sinα)².
tan α = F/mg =
= k•q²/(2•L•sinα)² •mg.
q = (2•L•sinα) • √(m•g•tanα/k)=
=(2•0.5•0.486) • √(0.0142•9.8•0.557/9•10^9) =
q = 0.486 • √(8.61•10^-12)
q = 0.486 • 2.93•10^-6
q = 1.424•10^-6 C
q = 1.424 μC.
Answer:
(a) Velocity will be 17.146 m/sec
(b) Volume flow rate will be
Explanation:
We have given height of the dam h = 15 m
Acceleration due to gravity
Effective area
(a) From conservation of energy
Potential energy at the top will be equal to kinetic energy at the bottom
So
(b) We have to find the volume flow rate
Volume flow rate is given by
Answer:
The reactive part of a circuit changes electrical energy into another form of energy.
Explanation:
The reactive part of a circuit changes electrical energy into another form of energy.
The inductive part of a circuit changes electrical energy to magnetic energy and the capacitive part of a circuit changes electrical energy to electrostatic energy.
Answer:
Heat
Explanation:
This combo can cause weather such as tornados,hurricanes and storms.