Generalized global air circulation and precipitation patterns are caused by
2 answers:
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Answer:
the electric potential difference between the point at the center of the ring and a point on its axis ΔV is
Explanation:
Given the data in the question;
electric potential at the center of the ring V₀ = kQ / R
electric potential on the axis point Vr = kQ / √( R² + x² )
at a distance 6R from the center,
point at x = 6R
so distance circumference r = √( R² + (6R)² )
so
electric potential on the axis point Vr = kQ / √( R² + (6R)² )
Vr = kQ / R√37
Now
ΔV = V₀ - Vr
we substitute
ΔV = ( kQ / R) - ( kQ / R√37 )
ΔV = kQ/R( 1 - 1/√37 )
ΔV = kQ/R( 1 - 0.164398987 )
ΔV = kQ/R( 0.8356 )
ΔV = { where k =
}
Therefore, the electric potential difference between the point at the center of the ring and a point on its axis ΔV is
Answer:
The velocity is highest at the lowest point of the trajectory
Explanation:
We can answer the question by applying the law of conservation of energy. In fact, neglecting friction and air resistance, the mechanical energy of the pendulum is constant during the motion:
where:
is the kinetic energy, with m being the mass of the pendulum and v the velocity
is the potential energy, with g being the acceleration due to gravity and h the heigth of the pendulum with respect to the lowest position
Since E must remain constant, we see that when K is maximum, U is minimum, and viceversa. This also means that when the velocity (v) is maximum, then the height (h) is minimum, so the pendulum must be at its lowest point.