COLLEGE PHYSICS - LCPO
4th Edition
ISBN: 9780134700427
Author: Knight
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 22, Problem 8CQ
Cells in the nervous system have a potential difference of 70 mV across the cell membrane separating the interior of the cell from the extracellular fluid. This potential difference is maintained by ion pumps that move charged ions across the membrane. Is this an emf?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Cells in the nervous system have a potential difference of 70 mV across the cell membrane separating the interior of the cell from the extracellular fluid. This potential difference is maintained by ion pumps that move charged ions across the membrane. Is this an emf?
Patients with recurring ventricular arrhythmia, irregular beats of the heart's ventricles, are often fitted with implantable cardioverter defibrillators
(ICD) that monitor the beating of the patient's heart. Much like an external defibrillator, an ICD delivers up to 40.0 J of energy to the heart when
irregular heartbeat is detected. A standard ICD contains a 3.2 V lithium ion battery and has an equivalent capacitance of 140 µF.
(a) What is the charge (in C) stored on the fully charged capacitor in an ICD?
0.106
с
(b) What should the internal resistance (in 2) of the charging circuit in the ICD be if the capacitor is to attain 94.9% of its maximum charge within
1.75 s?
-4200
X
How does the charge of a capacitor increase as it is being charged? What is the desired percentage of the total charge after the time interval
specified in the problem?
(c) The total effective resistance of the circuit when the ICD discharges through the heart is 500 , in series with the capacitor in the ICD.…
What is the voltage at R1?
Chapter 22 Solutions
COLLEGE PHYSICS - LCPO
Ch. 22 - Prob. 2CQCh. 22 - Prob. 3CQCh. 22 - Prob. 4CQCh. 22 - All wires in Figure Q22.519 are made of the same...Ch. 22 - A wire carries a 4 A current. What is the current...Ch. 22 - Prob. 7CQCh. 22 - Cells in the nervous system have a potential...Ch. 22 - a. Which directionclockwise or...Ch. 22 - Prob. 10CQCh. 22 - Prob. 11CQ
Ch. 22 - The two circuits in Figure Q22.12 use identical...Ch. 22 - The two circuits in Figure Q22.13 use identical...Ch. 22 - Prob. 14CQCh. 22 - Rank in order, from largest to smallest, the...Ch. 22 - The circuit in Figure Q22.16 has three batteries...Ch. 22 - Prob. 17CQCh. 22 - Prob. 18CQCh. 22 - Over time, atoms boil off the hot filament in an...Ch. 22 - Prob. 20CQCh. 22 - A 100 W lightbulb is brighter than a 60 W...Ch. 22 - Lightbulbs are typically rated by their power...Ch. 22 - Lightbulbs are typically rated by their power...Ch. 22 - A copper wire is stretched so that its length...Ch. 22 - The potential difference across a length of wire...Ch. 22 - Prob. 26MCQCh. 22 - A resistor connected to a 3.0 V battery dissipates...Ch. 22 - If a 1.5 V battery stores 5.0 kJ of energy (a...Ch. 22 - Figure Q22.29 shows a side view of a wire of...Ch. 22 - A person gains weight by adding fatand therefore...Ch. 22 - Prob. 31MCQCh. 22 - The current in an electric hair dryer is 10 A. How...Ch. 22 - Prob. 2PCh. 22 - Three wires meet at a junction. Wire 1 has a...Ch. 22 - When a nerve cell depolarizes, charge is...Ch. 22 - A wire carries a 15 A current. How many electrons...Ch. 22 - In a typical lightning strike, 2.5 C flows from...Ch. 22 - Prob. 7PCh. 22 - In an ionic solution, 5.0 1015 positive ions with...Ch. 22 - Prob. 9PCh. 22 - What are the values of currents IB and IC in...Ch. 22 - The currents through several segments of a wire...Ch. 22 - How much electric potential energy does 1.0 C of...Ch. 22 - What is the emf of a battery that increases the...Ch. 22 - A 9.0 V battery supplies a 2.5 mA current to a...Ch. 22 - Prob. 16PCh. 22 - An electric catfish can generate a significant...Ch. 22 - A Wire with resistance R is connected to the...Ch. 22 - Wires 1 and 2 are made of the same metal. Wire 2...Ch. 22 - Prob. 20PCh. 22 - Resistivity measurements on the leaves of corn...Ch. 22 - Prob. 22PCh. 22 - A motorcyclist is making an electric vest that,...Ch. 22 - Prob. 24PCh. 22 - A 3.0 V potential difference is applied between...Ch. 22 - Prob. 26PCh. 22 - Prob. 27PCh. 22 - Prob. 28PCh. 22 - Figure P22.29 shows the...Ch. 22 - Figure P22.30 is a...Ch. 22 - In Example 22.6 the length of a 60 W, 240 ...Ch. 22 - The electric field inside a 30-cm-long copper wire...Ch. 22 - A copper wire is 1.0 mm in diameter and carries a...Ch. 22 - Two identical lightbulbs are connected in series...Ch. 22 - Prob. 35PCh. 22 - a. What is the resistance of a 1500 W (120 V) hair...Ch. 22 - Prob. 37PCh. 22 - A 70 W electric blanket runs at 18 V. a. What is...Ch. 22 - A 60-cm-long heating wire is connected to a 120 V...Ch. 22 - An electric eel develops a potential difference of...Ch. 22 - Prob. 41PCh. 22 - A 3.0 V battery powers a flashlight bulb that has...Ch. 22 - A heating element in a toaster dissipates 900 W...Ch. 22 - Prob. 44GPCh. 22 - Prob. 45GPCh. 22 - The hot dog cooker described in the chapter heats...Ch. 22 - Air isnt a perfect electric insulator, but it has...Ch. 22 - The biochemistry that takes place inside cells...Ch. 22 - High-resolution measurements have shown that an...Ch. 22 - When an ion channel opens in a cell wall (see...Ch. 22 - The total charge a battery can supply is rated in...Ch. 22 - Prob. 52GPCh. 22 - The heating element of a simple heater consists of...Ch. 22 - Variations in the resistivity of blood can give...Ch. 22 - A 40 W (120 V) lightbulb has a tungsten filament...Ch. 22 - Prob. 56GPCh. 22 - When the starter motor on a car is engaged, there...Ch. 22 - Prob. 58GPCh. 22 - The two segments of the wire in Figure P22.59 have...Ch. 22 - Prob. 60GPCh. 22 - Prob. 61GPCh. 22 - Prob. 62GPCh. 22 - Prob. 63GPCh. 22 - Prob. 64GPCh. 22 - An immersion heater used to boil water for a...Ch. 22 - The graph in Figure P22.66 shows the current...Ch. 22 - Its possible to estimate the percentage of fat in...Ch. 22 - If you touch the two terminals of a power supply...Ch. 22 - The average resistivity of the human body (apart...Ch. 22 - MCAT-Style Passage Problems Lightbulb Failure...Ch. 22 - MCAT-Style Passage Problems Lightbulb Failure...Ch. 22 - MCAT-Style Passage Problems Lightbulb Failure...Ch. 22 - MCAT-Style Passage Problems Lightbulb Failure...
Additional Science Textbook Solutions
Find more solutions based on key concepts
Summarize the scientific pros and cons of sending humans to Mars. What other considerations are likely to play ...
Life in the Universe (4th Edition)
3. What is free-fall, and why does it make you weightless? Briefly describe why astronauts are weightless in th...
The Cosmic Perspective (8th Edition)
Using the definitions in Eqs. 1.1 and 1.4, and appropriate diagrams, show that the dot product and cross produc...
Introduction to Electrodynamics
When working with high-power electric circuits, it is advised that whenever possible, you work "one-handed” or ...
University Physics Volume 2
Can radio waves have the same frequencies as sound waves (20 Hz – 20,000 Hz)?
Physics for Scientists and Engineers with Modern Physics
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- (a) What is the unknown emfx in a potentiometer that balances when Rxis 10.0 O, and balances when Rsis 15.0for a standard 3.000-V emf? (b) The same emfx is placed in the same potentiometer, which now balances when Rsis 15.0for a standard emf of 3.100 V. At what resistance Rxwill the potentiometer balance?arrow_forwardA battery has emf E and internal resistance r = 2.00 Ω. A 12.0 Ω resistor is connected to the battery, and the resistor consumes electrical power at a rate of 96.0 J/ What is the emf of the battery?arrow_forwardThe power supplied to a typical black-and-white television is 90.0 W when the set is connected across a potential difference of 120 V. How much electrical energy does this set consume in 1.51 h? Jarrow_forward
- A solar cell generates a potential difference of 0.17 V when a 550 resistor is connected across it, and a potential difference of 0.24 V when a 970 resistor is substituted. What are the (a) internal resistance and (b) emf of the solar cell? (c) The area of the cell is 1.2 cm² and the rate per unit area at which it receives energy from light is 4.9 mW/cm². What is the efficiency of the cell for converting light energy to thermal energy in the 970 2 external resistor? (a) Number (b) Number (c) Number i Units Units Units Ω V perarrow_forwardMeasuring Blood Flow. Blood contains positive and negative ions and thus is a conductor. A blood vessel, therefore, can be viewed as an electrical wire. We can even picture the flowing blood as a series of parallel conducting slabs whose thickness is the diameter 5.00 mm of the vessel moving with speed. (See in the following figure.(Figure 1)) Figure X X BX X X X X X X X X d 1 of 1 V potential difference of 1.00 mV ? Express your answer with the appropriate units. B = 1.31 T Submit Part C Correct R= Determine the volume rate of flow (R). (Note: Although the method developed here is useful in measuring the rate of blood flow in a vessel, it is limited to use in surgery because measurement of the potential & must be made directly across the vessel.) Express your answer in terms of some or all of the variables B, d, v, and E. Previous Answers A cylindrical blood vessel in a magnetic field. av 4B Submit ΑΣΦ Provide Feedback Bw Previous Answers Request Answer ? X Incorrect; Try Again; 3…arrow_forwardTwo resistors R1 = 5.0 Ω and R2 = 20.0 Ω are connected parallel and the combined resistors is connected to a battery of Emf = VT. If R1 carries current of 2.0 A, what is the current through R2?arrow_forward
- A circuit consists of a battery with an EMF of 2.50 V and three capacitors in parallel, where C1 = 2.00 μ F, C2 =4.00 μ F, and C3 = 6.00 μ F. What is the charge on C2?arrow_forwardIn a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 1.8 x 106 ohms. One pulse is delivered every time the fully charged capacitor loses 63.2% of its original charge. What is the capacitance of the capacitor?arrow_forwardWhile taking a bath, a person touches the metal case of a radio. The path through the person to the drainpipe and ground has a resistance of 4460 Ω. What is the smallest voltage (in V) on the case of the radio that could cause ventricular fibrillation?arrow_forward
- Electric fish generate current with biological cells called electroplaques, which are physiological emf devices. The electroplaques in the South American eel are arranged in 140 rows, each row stretching horizontally along the body and each containing 5,390 electroplaques. Each electroplaque has an emf of 0.15 V and internal resistance of 0.25 Ω. If the water surrounding the fish has resistance of 790 Ω, how much current (in A) can the eel produce in water from near its head to near its tail?arrow_forwardElectrogenic fish, like electric eels, have the ability to create fairly large voltages that can be used for defense or to stun their prey (see the photo). The electric eel has three organs along the length of its body that allow it to produce electricity. The organs contain special cells, called electrocytes, that can generate a voltage of 0.15 V/cell. When aligned, the cells resemble a stack of capacitors connected in series that allow a current of ions to flow through them. Eels are capable of producing a discharge at 860 V with a current of 1.0 A. (a) How much electrical power is delivered by the eel during a discharge? Use the information above. (b) How many cells would have to be aligned to produce a discharge voltage of 860 V? (c) What is the ratio of the capacitance of a single electrocyte to that of the equivalent capacitance of the entire stack of cells? (a) Number (b) Number (c) Number Units Units Units ◄► Copyright © 2006 Steven G. Johnson and donated to Wikipedia under…arrow_forwardElectrogenic fish, like electric eels, have the ability to create fairly large voltages that can be used for defense or to stun their prey (see the photo). The electric eel has three organs along the length of its body that allow it to produce electricity. The organs contain special cells, called electrocytes, that can generate a voltage of 0.15 V/cell. When aligned, the cells resemble a stack of capacitors connected in series that allow a current of ions to flow through them. Eels are capable of producing a discharge at 860 V with a current of 1.0 A. (a) How much electrical power is delivered by the eel during a discharge? Use the information above. (b) How many cells would have to be aligned to produce a discharge voltage of 860 V? (c) What is the ratio of the capacitance of a capacitance of the entire stack of cells? single electrocyte to that of the equivalent (a) Number i (b) Number (c) Number i Units Units Units > < Copyright © 2006 Steven G. Johnson and donated to Wikipedia…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
DC Series circuits explained - The basics working principle; Author: The Engineering Mindset;https://www.youtube.com/watch?v=VV6tZ3Aqfuc;License: Standard YouTube License, CC-BY