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### Section 23.4 Resonance in Electric Circuits?

A series RCL circuit contains a 5.14-µF capacitor and a generator whose voltage is 10.6 V. At a resonant frequency of 1.22 kHz the power delivered to the circuit is 25.5 W.

(a) Find the value of the inductance.

(b) Find the value of the resistance.

(c) Calculate the power factor when the generator frequency is 2.43 kHz.

1 AnswerPhysics9 years ago### Electric Circuits connected in Parallel?

Two resistors, R1 = 20 (omhs) and R2 = 80 (omhs) are connected in parallel.

Both resistors are then connected to a battery with an unknown voltage. The current

through the 80 resistor is 1.5A. Make a drawing of the circuit and determine:

(a) The battery voltage.

(b) The current in the other resistor.

(c) The total power supplied by the battery.

(d) The power consumed by each of the two resistors.

5 AnswersPhysics9 years ago### Three point charges have equal magnitudes, two being positive and one negative.?

Three point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle, as the drawing shows. The magnitude of each of the charges is 5.0 μC, and the lengths of the sides of the triangle are 3.0 cm.

Calculate the magnitude of the net force that each charge experiences.

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3 AnswersPhysics9 years ago### Just want to check my answer.please help?

A point charge q = +2.2 µC is placed at eachcorner of an equilateral triangle with sides 0.21 m inlength.

What is the magnitude of the electric field at the midpointof any of the three sides of the triangle?

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1 AnswerPhysics9 years ago### Determine the voltage across the 5.0-Ω resistor?

Determine the voltage across the 5.0-Ω resistor in the drawing (V1 = 13.0 V and V2 = 14.0 V).

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4 AnswersPhysics9 years ago### The Electric Potential Difference Created by Point Charges?

Determine the electric potential energy for the array of three charges shown in the drawing, relative to its value when the charges are infinitely far away. (Let q1 = 7.20 µC, q2 = 18.6 µC, and q3 = -13.7 µC.)

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2 AnswersPhysics9 years ago### Equipotential Surfaces and Their Relation to the Electric Field?

The drawing shows a graph of a set of equipotential surfaces seen in cross section. Each is labeled according to its electric potential. A +2.3 10-7 C point charge is placed at position A. Find the work that is done on the point charge by the electric force when it is moved about the the following ways.

picture url:

https://www.webassign.net/cj8/19-p-036.gif

(a) from A to B (in J)

(b) from A to C (in J)

2 AnswersPhysics9 years ago### Capacitors in Series and in Parallel?

A 2.16-µF and a 3.60-µF capacitor are connected to a 57.0-V battery. What is the total charge supplied to the capacitors when they are wired in the following ways?

(a) in parallel with each other

(in Coulombs)

(b) in series with each other

( in Coulombs)

1 AnswerPhysics9 years ago### Capacitors in Series and in Parallel?

A 3.00-µF and a 5.00-µF capacitor are connected in series across a 30.0-V battery. A 8.00 µF capacitor is then connected in parallel across the 3.00 µF capacitor. Determine the voltage across the 8.00 µF capacitor. (in Volts)

1 AnswerPhysics9 years ago### Section 19.4 Equipotential Surfaces and Their Relation to the Electric Field?

The drawing shows a graph of a set of equipotential surfaces seen in cross section. Each is labeled according to its electric potential. A +2.3 10-7 C point charge is placed at position A. Find the work that is done on the point charge by the electric force when it is moved about the the following ways.

Image url:

https://www.webassign.net/cj8/19-p-036.gif

(a) from A to B (in Jules)

(b) from A to C (in Jules)

1 AnswerPhysics9 years ago### The Electric Potential Difference Created by Point Charges?

Two particles each have a mass of 5.9 10-3 kg. One has a charge of +5.5 10-6 C, and the other has a charge of -5.5 10-6 C. They are initially held at rest at a distance of 0.86 m apart. Both are then released and accelerate toward each other. How fast is each particle moving when the separation between them is one-third its initial value? (in m/s)

3 AnswersPhysics9 years ago### Determine the magnitude?

Two point charges are fixed on the y axis: a negative point charge q1 = -22 µC at y1 = +0.20 m and a positive point charge q2 at y2 = +0.38 m. A third point charge q = +7.6 µC is fixed at the origin. The net electrostatic force exerted on the charge q by the other two charges has a magnitude of 24 N and points in the +y direction. Determine the magnitude of q2. (in coulumbs)

3 AnswersPhysics9 years ago### Section 9.4 Newton's Second Law for Rotational Motion About a Fixed Axis?

A block (mass = 2.1 kg) is hanging from a massless cord that is wrapped around a pulley (moment of inertia = 1.3 10-3 kg · m2), as the drawing shows. Initially the pulley is prevented from rotating and the block is stationary. Then, the pulley is allowed to rotate as the block falls. The cord does not slip relative to the pulley as the block falls. Assume that the radius of the cord around the pulley remains constant at a value of 0.037 m during the block's descent. Find the angular acceleration (in rad/s^2) of the pulley and the tension in the cord. (in N)

2 AnswersAstronomy & Space9 years ago### Section 8.4 Angular Variables and Tangential Variables?

Some bacteria are propelled by biological motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.59 10-8 m, and a tangential speed at the rim of 2.43 10-5 m/s.

How long does it take the motor to make one revolution? (in seconds)

3 AnswersPhysics9 years ago### Section 9.4 Newton's Second Law for Rotational Motion About a Fixed Axis?

A block (mass = 2.1 kg) is hanging from a massless cord that is wrapped around a pulley (moment of inertia = 1.3 10-3 kg · m2), as the drawing shows. Initially the pulley is prevented from rotating and the block is stationary. Then, the pulley is allowed to rotate as the block falls. The cord does not slip relative to the pulley as the block falls. Assume that the radius of the cord around the pulley remains constant at a value of 0.037 m during the block's descent. Find the angular acceleration (in rad/s2) of the pulley and the tension in the cord. (in N)

2 AnswersAstronomy & Space9 years ago### Section 9.2 Rigid Objects in Equilibrium Section 9.3 Center of Gravity?

The drawing shows a uniform horizontal beam attached to a vertical wall by a frictionless hinge and supported from below at an angle θ = 43° by a brace that is attached to a pin. The beam has a weight of 338 N. Three additional forces keep the beam in equilibrium. The brace applies a force to the right end of the beam that is directed upward at the angle θ with respect to the horizontal. The hinge applies a force to the left end of the beam that has a horizontal component and a vertical component . Find the magnitudes of these three forces.

V =

P =

H =

2 AnswersPhysics9 years ago### Centripetal Acceleration and Tangential Acceleration?

An electric drill starts from rest and rotates with a constant angular acceleration. After the drill has rotated through a certain angle, the magnitude of the centripetal acceleration of a point on the drill is twice the magnitude of the tangential acceleration. What is the angle? (in radians)

3 AnswersPhysics9 years ago### Section 8.3 The Equations of Rotational Kinematics?

A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration of 0.190 rad/s2. After making 2860 revolutions, its angular speed is 132 rad/s.

(a) What is the initial angular velocity of the turbine?

in rad/s

(b) How much time elapses while the turbine is speeding up?

in seconds

1 AnswerPhysics9 years ago### Centripetal Force Question?

An 815-kg race car can drive around an unbanked turn at a maximum speed of 52 m/s without slipping. The turn has a radius of curvature of 130 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 7600 N on the car.

(a) What is the coefficient of static friction between the track and the car's tires?

(b) What would be the maximum speed if no downforce acted on the car?

(in m/s)

1 AnswerPhysics9 years ago### Please help me with this Physics problem?

A worker stands still on a roof sloped at an angle of 33.2° above the horizontal. He is prevented from slipping by a static frictional force of 392 N. Find the mass of the worker. (in kg)

4 AnswersPhysics9 years ago