**Understanding Defibrillators: A Life-Saving Device**The immediate cause of many deaths is ventricular fibrillation, which is characterized by an uncoordinated quivering of the heart rather than proper beating. An electric shock to the chest, administered through a defibrillator, can cause momentary paralysis of the heart muscle, potentially allowing it to resume organized beating.**What is a Defibrillator?**- A defibrillator is a medical device designed to apply a strong electric shock to the chest, typically over a period of just a few milliseconds.- The device includes a capacitor charged to several thousand volts.**Components and Operation:**- **Electrodes:** Also referred to as paddles, they are about 8 cm across and are coated with conducting paste. These paddles are positioned on both sides of the heart.- **Insulation:** The handles of the paddles are insulated for operator safety.- **Procedure:** The operator calls "Clear!" and presses a button on one paddle to discharge the capacitor through the patient's chest.**Example Problem:**Assume an energy of 345 watt-seconds (W·s) needs to be delivered from a 35.0-microfarad (μF) capacitor. We calculate the potential difference the capacitor must be charged to:\[ \square \text{ V} \]This exercise helps understand the physics behind defibrillator operations and the role of capacitors in storing and delivering energy.

Given Energy stored (E) = 345 w-s capacitance (C) = 35 μF

The immediate cause of many deaths is ventricular fibrillation, an uncoordinated quivering of the heart, as opposed to proper beating. An electric shock to the chest can caus momentary paralysis of the heart muscle, after which the heart will sometimes start organized beating again. A defibrillator is a device that applies a strong electric shock to the chest over a time of a few milliseconds. The device contains a capacitor of a few microfarads charged to several thousand volts. Electrodes called paddles, about 8 cm across and coated with conducting paste, are held against the chest on both sides of the heart. Their handles are insulated to prevent injury to the operator, who calls. "Clear and pushes a button on one paddle to discharge the capacitor through the patient's chest. Assume an energy of 345 W s is to be delivered from a 35.0-μF capacitor. To wha potential difference must it be charged? V

The immediate cause of many deaths is ventricular fibrillation, an uncoordinated quivering of the heart, as opposed to proper beating. An electric shock to the chest can caus momentary paralysis of the heart muscle, after which the heart will sometimes start organized beating again. A defibrillator is a device that applies a strong electric shock to the chest over a time of a few milliseconds. The device contains a capacitor of a few microfarads charged to several thousand volts. Electrodes called paddles, about 8 cm across and coated with conducting paste, are held against the chest on both sides of the heart. Their handles are insulated to prevent injury to the operator, who calls. "Clear and pushes a button on one paddle to discharge the capacitor through the patient's chest. Assume an energy of 345 W s is to be delivered from a 35.0-μF capacitor. To wha potential difference must it be charged? V

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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**Understanding Defibrillators: A Life-Saving Device**

The immediate cause of many deaths is ventricular fibrillation, which is characterized by an uncoordinated quivering of the heart rather than proper beating. An electric shock to the chest, administered through a defibrillator, can cause momentary paralysis of the heart muscle, potentially allowing it to resume organized beating.

**What is a Defibrillator?**
- A defibrillator is a medical device designed to apply a strong electric shock to the chest, typically over a period of just a few milliseconds.
- The device includes a capacitor charged to several thousand volts.

**Components and Operation:**
- **Electrodes:** Also referred to as paddles, they are about 8 cm across and are coated with conducting paste. These paddles are positioned on both sides of the heart.
- **Insulation:** The handles of the paddles are insulated for operator safety.
- **Procedure:** The operator calls "Clear!" and presses a button on one paddle to discharge the capacitor through the patient's chest.

**Example Problem:**
Assume an energy of 345 watt-seconds (W·s) needs to be delivered from a 35.0-microfarad (μF) capacitor. We calculate the potential difference the capacitor must be charged to:

\[ \square \text{ V} \]

This exercise helps understand the physics behind defibrillator operations and the role of capacitors in storing and delivering energy.

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