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Rufina [12.5K]
3 years ago
14

A capacitor is perfectly insulator for?​

Physics
1 answer:
photoshop1234 [79]3 years ago
5 0

Answer:

A capacitor becomes a perfect insulator for direct current as the regular supply of current charges capacitor and the it behaves as open circuit, where as in A.C. the current being variable in sign and magnitude does not charge capacitor ever it goes through a repetitive process of charging and discharging and hence it never behaves as open circuit.

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un objeto de 10kg cae desde una altura y tarda 2 segundos en caer al suelo. cual era su velocidad al llegar al suelo? de que alt
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Explanation:

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10. An object of a mass 300 KG is observed to accelerate at the rate of 4M/S2. Calculate the force required to produce this acce
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1200 Newton

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3 years ago
A 85-kg physics student jumps from a dock into a 135 kg boat that is at rest by the dock. If the velocity
Gnesinka [82]

Answer:

<em>The final velocity of the student and the boat is 1.66 m/s</em>

Explanation:

<u>Law Of Conservation Of Linear Momentum </u>

The total momentum of a system of bodies is conserved unless an external force is applied to it. The formula for the momentum of a body with mass m and velocity v is P=mv. If we have a system of bodies, then the total momentum is the sum of them all

P=m_1v_1+m_2v_2+...+m_nv_n

Let's call m_s = 85\ kg the mass of the physics student, m_b = 135\ kg the mass of the boat, v_{so} =4.3\ m/s the initial speed of the student, v_{bo} =0 the initial speed of the boat, v_f the final speed of both, assumed common since they keep joined after the jump. Applying the law of conservation of momentum, being P_o\ and\ P_f the initial and final momentum of the system, we have

P_o=P_f

m_sv_{so}+m_bv_{bo}=(m_s+m_b)v_f

Solving for v_f

v_f=\frac{m_sv_{so}+m_bv_{bo}}{(m_s+m_b)}

v_f=\frac{85(4.3)+0}{(85+135)}

v_f=1.66 \ m/s

The final velocity of the student and the boat is 1.66 m/s

4 0
4 years ago
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