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azamat
3 years ago
14

A 6.00 μF capacitor that is initially uncharged is connected in series with a 4.00 Ω resistor and an emf source with EMF = 60.0

V and negligible internal resistance. . At the instant when the resistor is dissipating electrical energy at a rate of 300 W, how much energy has been stored in the capacitor?

Physics
1 answer:
vesna_86 [32]3 years ago
5 0

Explanation:

Below is an attachment containing the solution.

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Three dogs (Spot, Fido, and Steinberg) are pulling on a chew toy. The chew toy is experiencing no acceleration. Spot is pulling
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Answer:

The magnitude and direction of the force applied by Steinberg are approximately 15.192 newtons and 126.704º.

Explanation:

The chew toy is at equilibrium and experimenting three forces from three distinct dogs. The Free Body Diagram depicting the system is attached below. By Newton's Laws we construct the following equations of equilibrium: (<em>Sp</em> is for Spot, <em>F</em> is for Fido and <em>St</em> is for Steinberg) All forces and angles are measured in newtons and sexagesimal degrees, respectively:

\Sigma F_{x} = F_{F}\cdot \cos \theta_{F} + F_{St,x} = 0 (1)

\Sigma F_{y} = F_{F}\cdot \sin \theta_{F}-F_{Sp}+F_{St,y} = 0 (2)

If we know that F_{F} = 20\,N, F_{Sp} = 30\,N and \theta_{F} = 63^{\circ}, then the components of the force done by Steinberg on the chewing toy is:

F_{St,x} = -F_{F}\cdot \cos \theta_{F}

F_{St,x} = -(20\,N)\cdot \cos 63^{\circ}

F_{St, x} = -9.080\,N

F_{St,y} = F_{Sp}-F_{F}\cdot \sin \theta_{F}

F_{St,y} = 30\,N-(20\,N)\cdot \sin 63^{\circ}

F_{St, y} = 12.180\,N

The magnitud of the force is determined by Pythagorean Theorem:

F_{St} = \sqrt{F_{St,x}^{2}+F_{St,y}^{2}}

F_{St} =\sqrt{(-9.080\,N)^{2}+(12.180\,N)^{2}}

F_{St} \approx 15.192\,N

Since the direction of this force is in the 3rd Quadrant on Cartesian plane, we determine the direction of the force with respect to the eastern semiaxis:

\theta_{St} = 180^{\circ} + \tan^{-1} \left(\frac{F_{St,y}}{F_{St,x}}\right)

\theta_{St} = 180^{\circ} + \tan^{-1} \left(\frac{12.180\,N}{-9.080\,N}\right)

\theta_{St} \approx 126.704^{\circ}

The magnitude and direction of the force applied by Steinberg are approximately 15.192 newtons and 126.704º.

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A 60-kg swimmer suddenly dives horizontally from a 150-kg raft with a speed of 1.5 m/s. The raft is initially at rest. What is t
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I’m almost positive it 60 m/s
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What causes a objects to move or stay still? claim and evidence
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Answer:

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Explanation:

A push or a pull is an example of a force and can cause an object to speed up, slow down, etc..  Newton's laws tell us that 1- an object will not change its motion unless a force acts on it 2- the force on an object is equal to its mass times its acceleration. 3- The third law states that for every action (force) in nature there is an equal and opposite reaction.. However, forces like gravity and friction can resist movement.

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Answer:

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