1. Science!

    What are the parts of a battery and how do they function? http://home.howstuffworks.com/battery.htm

    asked by I REALLY NEED HELP! on November 16, 2006
  2. Science

    A battery operated flashlight is turned on. What energy transformations take place and how does the amount of energy in the batteries compare to the total amount of light given? Hopefully the following sites will help you understand the principles of

    asked by Judith on May 30, 2007
  3. Physics

    When a battery is not used in a circuit, a voltmeter measure 1.492V across the terminals of the battery. When a 2.50Ω light bulb is connected to the battery, the potential difference across the terminal of the battery is 1.453V. Calculate the internal

    asked by exo-L on December 13, 2018
  4. physics

    A 8 V flashlight battery has an internal resistance of 1.7 Ω when new, and 8 Ω when old. Imagine this is a resistor in series with the battery mounted INSIDE the battery itself, which describes the chemical degradation of the battery with age. Calculate

    asked by Naina on July 19, 2011
  5. science

    A 12V battery has 6cells in series. The E.m.f of the battery is 13.8V and the load drawing 10amp is connected to the battery. THe PD is now 12.0V. Calculate the internal resistance per cell of the battery

    asked by funi on March 17, 2016
  6. Physics

    A battery charger is connected to a dead battery and delivers a current of 4.5 A for 6.0 hours, keeping the voltage across the battery terminals at 12 V in the process. How much energy is delivered to the battery?

    asked by Mary on September 6, 2007
  7. chemistry

    What is the general form of a common automobile battery? How many electrodes does a car battery use? Does it use an acidic aqueous electrolyte solution? Is the battery rechargeable? Is the battery voltaic or electrolytic when discharging? Is the battery

    asked by Anonymous on April 27, 2012
  8. Calculus

    An electric circuit switches instantaneously from a 5 volt battery to a 18 volt battery 3 seconds after being turned on. Sketch on a sheet of paper a graph the battery voltage against time. Then fill in the formulas below for the function represented by

    asked by Jordan on September 6, 2016
  9. calculus

    An electrical circuit switches instantaneously from a 3 volt battery to a 23 volt battery 6 seconds after being turned on. Sketch on a sheet of paper a graph the battery voltage against time. Then fill in the formulas below for the function represented by

    asked by nicole on September 8, 2013
  10. Physics

    a)In the series circuits, what do you notice about the voltage across each resistor compared with the voltage of the battery? (There could be more than one answer) 1.The resistor voltages multiplied together give the battery's voltage 2.The resistor

    asked by Mariah on May 4, 2016
  11. Physics

    A battery has an unknown e.m.f, ε,and an internal resistance r = 0.40Ω. When a resistance R = 5.60Ω is connected across the terminals of the battery, the terminal potential difference across the battery is 11.2V. What is the e.m.f. of the battery?

    asked by prada on December 13, 2018
  12. physics

    Consider a battery that has Vt = 12.0 V when it is not connected to a circuit. When a 10.0- resistor is connected with the battery, the potential difference across the battery’s terminals drops to 10.9 V. What is the internal resistance of the

    asked by anna on September 12, 2012
  13. Science

    Consider a lead-acid battery with 500 Ah capacity and a rated voltage of 12 V. a)What is the total capacity of energy in watt-hours that can be stored in the battery? b)Assume that the battery is completely empty. The battery is now charging at a C-rate of

    asked by John on June 5, 2017
  14. calc 1

    An electrical circuit switches instantaneously from a 3 volt battery to a 22 volt battery 8 seconds after being turned on. Sketch on a sheet of paper a graph the battery voltage against time. Then fill in the formulas below for the function represented by

    asked by Mia on January 28, 2016
  15. Calculus

    An electrical circuit switches instantaneously from a 2 volt battery to a 20 volt battery 3 seconds after being turned on. Sketch on a sheet of paper a graph the battery voltage against time. Then fill in the formulas below for the function represented by

    asked by Abigail on February 5, 2011
  16. Physics

    A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.2 V when it is delivering 26.0 W of power to an external load resistor R. (a) What is the value of R? (b) What is the internal resistance of the battery?

    asked by Jasmine on February 16, 2015
  17. physics

    The voltage across the terminals of a 8.90 V battery is 8.00 V when the battery is connected to a 50.0 \Omega load.What is the battery's internal resistance?

    asked by Mitchell on March 9, 2011
  18. Physics

    If the emf of a battery is 23 V and a current of 66 A is measured when the battery is shorted, what is the internal resistance of the battery? Answer in units of Ω How would you set up the equation to solve?

    asked by Tiffany on March 4, 2013
  19. Physics

    A battery delivering a current of 55.0 A to a circuit has a terminal voltage of 21.8 V. The electric power being dissipated by the internal resistance of the battery is 36 W. Find the emf of the battery.

    asked by Anonymous on February 18, 2013
  20. Physics

    A 2.0-ohm resistor is connected in series with a 20.0-V battery and a three-branch parallel network with branches whose resistances are 8.0 ohms each. Ignoring the battery's internal resistance, what is the current in the battery?

    asked by leo on April 4, 2013
  21. Solar Energy

    a) Consider a lead acid battery with 100Ah capacity and a rated voltage of 24V. What is the total capacity of energy in Watt-hours that can be stored in the battery? b) Assume that the battery is completely empty. The battery is now charged at a C-rate of

    asked by Anonymous on November 14, 2013
  22. Physics

    A battery has an internal resistance of 0.42. A number of identical light bulbs, each with a resistance of 31.500, are connected in parallel across the battery terminals. The terminal voltage of the battery is observed to be one-half the emf of the

    asked by Luis on September 26, 2012
  23. Physics

    A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged

    asked by Nicole on February 14, 2013
  24. Physics

    A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged

    asked by Nicole on February 14, 2013
  25. CHEMISTRY

    Suppose that a fully charged lead¨Cacid battery contains 1.16 L of 5.00 M H2SO4. What will be the concentration of HSO4- in the battery after 2.83 A of current is drawn from the battery for 6.3 h? Pb(s) + PbO2(s) + 2H+(aq) + 2HSO4−(aq) ¡ú 2PbSO4(s) +

    asked by sabrina:help please on December 1, 2012
  26. science

    What are the parts of a battery and how do they function?

    asked by need help on November 15, 2006
  27. Physics

    Two resistors have resistances R1 and R2. When the resistors are connected in series to a 12.4-V battery, the current from the battery is 2.13 A. When the resistors are connected in parallel to the battery, the total current from the battery is 9.01 A.

    asked by Abigail on May 11, 2015
  28. Physics

    A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V. (C is the capacitance and U is the stored energy.) Answer the following questions regarding the capacitor charged

    asked by Jeff on February 6, 2012
  29. Science

    Hello I have an exam coming and my question is : Why do we sometimes have a tiny electical current ( spark ) when we take our sweater off because of the shirt and jacket rubbing each other , the negative charges will have static electricity But for an

    asked by Veronica on April 30, 2007
  30. physics

    when a battery is connected to a 100-Ω resistor, the current is 4.00 A. When the same battery is connected to a 449-Ω resistor, the current is 1.09 A. Find the emf supplied by the battery and the internal resistance of the battery.

    asked by Chuck on February 19, 2015
  31. physics

    A new "D" battery has an emf of 1.5 V. When a wire of negligible resistance is connected between the terminals of the battery, a current of 25 A is produced. Find the internal resistance of the battery. ________ Ω

    asked by ali-1 on January 26, 2011
  32. Easy chemistry

    Which statement correctly identifies how a lead-storage battery in a car works? A. The battery acts as a galvanic cell as it provides current to the radio. B. The battery acts as a galvanic cell as it is recharged by the alternator. C. The battery acts as

    asked by Morgan on October 22, 2014
  33. Chemistry

    Which statement correctly identifies how a lead-storage battery in a car works? A. The battery acts as a galvanic cell as it provides current to the radio. B. The battery acts as a galvanic cell as it is recharged by the alternator. C. The battery acts as

    asked by Morgan on October 22, 2014
  34. Physics

    A 20 volt battery has a 4 ohm internal resistance. There is a 5 amp fuse in the main line of the battery. How many 6 ohm resistors can be connected in parallel across the battery before thefuse blows?

    asked by Chyna on June 23, 2014
  35. Physics

    I have a circuit with three capacitors and a battery. The battery supplies 15V. The battery is in series with C3. C3 is in series with ( C23). C3= 3*10^-6 F C2= 2 *10^-6 F C1= 1*10^-6 F (respectively C2 +C3 are is parallel withe ach other). I know the

    asked by Sara on February 10, 2010
  36. Physics

    A 79.4-Ω and a 47.7-Ω resistor are connected in parallel. When this combination is connected across a battery, the current delivered by the battery is 0.296 A. When the 47.7-Ω resistor is disconnected, the current from the battery drops to 0.126 A. (a)

    asked by ann on March 6, 2013
  37. scince

    how are ice cubes made http://home.howstuffworks.com/icemaker.htm my science teacher, mr.Abothu, has set us homework on input variables and output variables but we have no clue what they are and its got to be in tomorrow! please help!!! regards lauren

    asked by Anonymous on January 25, 2007
  38. Physics

    11. If you have a circuit set up where you have have a 9 V battery and one resistor of 10 Ohms. You place a voltmeter across the two ends of the battery and it reads 8.333 V. What is the internal resistance of the battery? 12. A 12 V battery is set up in

    asked by H on March 12, 2020
  39. physics

    A car battery has a rating of 200 ampere·hours (A·h). This rating is one indication of the total charge that the battery can provide to a circuit before failing. What is the total charge (in coulombs) that this battery can provide? Determine the maximum

    asked by rick on January 30, 2008
  40. Statistics

    Several states, including California, have passed legislation requiring automakers to sell a certain percentage of zero-emissions cars within their borders. One current alternative is battery-powered cars. The major problem with battery-operated cars is

    asked by Eddy on April 10, 2016
  41. Physics

    Suppose the battery on your phone delivers a current of 0.740 mA (that's milliAmperes) over a time of 4.00 hours. What is the total charge that flows out of the battery during this time? AND How many electrons flow out of the battery during this time?

    asked by Tessa on January 28, 2013
  42. PHYSICS

    When the resistors are connected in series to a 12.0-V battery, the current from the battery is 1.73 A. When the resistors are connected in parallel to the battery, the total current from the battery is 10.1 A. Determine the two resistances.

    asked by PLEASE HELP on January 25, 2013
  43. physics please help!!

    A parallel plate capacitor with plate separation d is connected to a battery. The capacitor is fully charged to Q Coulombs and a voltage of V Volts. (C is the capacitance and U is the stored energy.) Select true or false for each statement. 1) With the

    asked by archi on February 6, 2012
  44. Physics

    I'm stumped on what formula to use for the following question. A 1.5V battery does 4.5*10^2 J of work in 120s. Calculate the current through the battery Calculate the number of elementary charges that pass through the battery. I've been trying to figure

    asked by Kate on August 26, 2009
  45. Physics

    A car battery is rated at 90A hr, meaning that it can supply a 90A current for 1 hr before being completely discharged. If you leave your headlights on until the battery is completely dead, how much charge leaves the positive terminal of the battery?

    asked by Anthony on February 17, 2010
  46. Physics

    Three resistors are connected in series across a battery. The value of each resistance and its maximum power rating are as follows: 7.1Ω and 20.9 W, 29.5Ω and 11.4 W, and 13.6Ω and 12.5 W. (a) What is the greatest voltage that the battery can have

    asked by Brooke on March 3, 2017
  47. physics

    To recharge a 12 V battery, a battery charger must move 2.7 × 105 C of charge from the negative terminal to the positive terminal. How much work is done by the battery charger? Answer in units of J

    asked by Anonymous on April 16, 2012
  48. physics

    hen a battery is connected to a 100-Ω resistor, the current is 4.00 A. When the same battery is connected to a 449-Ω resistor, the current is 1.09 A. Find the emf supplied by the battery and the internal resistance of the battery. I know that emf is

    asked by Chuck on February 19, 2015
  49. Physics

    A circuit consists of a self inductor of L=0.003 H in series with a resistor R1=5 Ohm. Parallel to these is a resistor R2=10 Ohm. A battery of V0=9 volt is driving the circuit. Current has been running for 10 minutes. (a) How much energy (in Joules) is now

    asked by abdul rahman on April 9, 2013
  50. Chemistry

    A battery is constructed based on the oxidation of magnesium and the reduction of Cu^2+. The initial concentrations of Mg^2+ and Cu^2+ are 1.2*10^-4M and 1.5M, respectively, in 1.0-L half-cells. The initial voltage of the battery is 2.83V with the standard

    asked by Emma on May 2, 2010
  51. electrical

    A 20v battery with an internal resistance of 5ohm is connected to a resistance of x ohm if an additional 6ohm resistance is connected across the battery find the value of x so that the power supplied externally by the battery remains the same

    asked by Anonymous on March 6, 2017
  52. Biology

    what is the lense in the eyepiece of a microscope called? I thought it was just called a lens. However, since this is not my area of expertise, I searched Google under the key words "microscope parts eyepiece" to get these possible sources:

    asked by sydney on November 28, 2006
  53. Science

    Suppose you make an electromagnet with a copper wire and a battery by putting the two ends of the wire on the two ends of the battery. If you switch the side of the battery, are you changing the magnetic poles of the wire?

    asked by Anonymous on April 9, 2014
  54. Physics

    Suppose you make an electromagnet with a copper wire and a battery by putting the two ends of the wire on the two ends of the battery. If you switch the side of the battery, are you changing the magnetic poles of the wire?

    asked by Anonymous on April 9, 2014
  55. Science

    How do you descirbe how gas exchange in the air sacs? Well i do not get this may you help me ! http://www.howstuffworks.com/lung.htm

    asked by Hot Stuff on May 9, 2007
  56. AP PHYSICS

    A 3.0-uF capacitor and a 4.0-uF capacitor are connected in series across a 40.0-V battery. A 10.0-uF capacitor is also connected directly across the battery terminals. Find the total charge that the battery delivers to the capacitors. I NEED HELP WITH THIS

    asked by Becky on April 1, 2008
  57. College Physics 2

    A parallel-plate air capacitor is made from two plates 0.250 m square, spaced 0.70 cm apart. It is connected to a 140 V battery. a) What is the capacitance? C = 7.90×10−11 F b) What is the charge on each plate? Enter your answer as an absolute value of

    asked by Lisa on February 11, 2013
  58. Physics

    The electric starter in an automobile equipped with a 12 V battery draws a current of 100.00 A when in operation. Suppose it takes the motor 4.00 s to start the engine. What amount of electric energy has been withdrawn from the battery? Answer: (in J)

    asked by Ashton on September 14, 2014
  59. Physics

    The 500 kg video display will be raised to its position 20 m above the arena floor by a motorized winch powered by a 12 volt battery. If the battery capacity is 100 A-hr and the system is 100% efficient, how many times could the display be lifted into

    asked by Tyler on October 14, 2016
  60. physics

    how does a vcr work through electromagnetism? please give me some links. http://www.howstuffworks.com/vcr.htm http://en.wikipedia.org/wiki/VCR

    asked by jason on June 4, 2007
  61. General Physics 2

    A dead battery is charged by connecting it to the live battery of another car with jumper cables. Assume that V = 9 V and R = 0.80 Ù. Determine the current in the starter. Determine the current in the dead battery.

    asked by Sabrina on October 27, 2013
  62. Chemistry

    how do you identify an anode and cathode by direct observation in an electochemical battery when you don't have a voltmeter and the chemicals are no known. I look on the battery for a + and - sign. In a battery, the + pole is the cathode and the - pole is

    asked by lucie on January 11, 2007
  63. Science

    a student made an electromagnet using a battery electrical tape and metal wire. she wanted to see what the effect would be if she switched the side of the battery she connected each end of the wire to. which of the following would be a correct conclusion?

    asked by machile on October 31, 2016
  64. science

    Which choice most accurately describes the method of storing electrical energy in a battery? A battery can store energy when placed in a circuit. A chemical reaction occurs inside a battery, releasing the energy to push electrons in the circuit. A battery

    asked by Zaphior English on April 22, 2019
  65. math

    Solve by setting up the proper equation to describe the facts given and then carrying out the mathematical calculations to solve for the unknown variable(s). Three batteries are connected in series so that the total voltage is 54 volts. The voltage of the

    asked by kenny on July 6, 2012
  66. Science

    I've got homework and i need to find out how fuses work please can some body help before monday? It's explained here: http://auto.howstuffworks.com/wfc2.htm Thanks i needed that help

    asked by Mary on April 26, 2007
  67. science

    does antioxidants help put oxegan in your blood? No. so what are they for in your? body Thank you for using the Jiskha Homework Help Forum. Here are some sites on antioxidants: 1. http://en.wikipedia.org/wiki/Antioxidant 2.

    asked by jean on August 18, 2007
  68. chemistry

    A competing technology uses a photovoltaic cell to charge a battery which can then be used to power a LED light. To compare these technologies, we make some reasonable assumptions. We assume the solar cell is 10 cm on a side, and that it has an efficiency

    asked by Danny Simone on December 18, 2013
  69. calculus

    A competing technology uses a photovoltaic cell to charge a battery which can then be used to power a LED light. To compare these technologies, we make some reasonable assumptions. We assume the solar cell is 10 cm on a side, and that it has an efficiency

    asked by Danny Simone on December 18, 2013
  70. economics 7

    An electronics company advertises that the battery life of its new smart phone with normal usage averages 72 hours. The company says this is one of the desirable characteristics of the phone which makes the phone a better choice compared to competitor

    asked by Mia on September 7, 2014
  71. economics

    An electronics company advertises that the battery life of its new smart phone with normal usage averages 72 hours. The company says this is one of the desirable characteristics of the phone which makes the phone a better choice compared to competitor

    asked by miguel on September 8, 2014
  72. economics (7)

    An electronics company advertises that the battery life of its new smart phone with normal usage averages 72 hours. The company says this is one of the desirable characteristics of the phone which makes the phone a better choice compared to competitor

    asked by miguel on September 8, 2014
  73. Physics

    A battery with an emf of 10.3 V and internal resistance of 1.03 Ω carries a positive current of 0.550 A from its negative terminal to its positive terminal. (a) How long is required for 1.05 C of charge to pass through the battery? t = Q/I = (1.05)/(.550)

    asked by Brandi on July 7, 2014
  74. physics- electricity

    An electric car uses a lithium metal hydride battery with a mass of 250 kg. The battery delivers 300v and holds a stored charge q of 70 ampere-hours. Calculate the total energy stored in the battery in kWh. Calculate the number of gallons of gas that would

    asked by Anonymous on February 27, 2013
  75. physics

    The emf of a battery is equal to its terminal potential difference: A) under all conditions B) only when the battery is being charged C) only when a large current is in the battery D) only when there is no curent in the battery E) under no conditions my

    asked by susane on March 27, 2007
  76. science

    Which type of muscle is resposible for moving fluids through the urinary system Since this is not my area of expertise, I searched Google under the key words "urinary system muscle" to get these possible sources:

    asked by suzie on May 19, 2007
  77. Chemistry

    Compare & Explain the differences between a lead-acid battery and a dry-cell battery?

    asked by sarah on November 3, 2010
  78. Physics

    What is the emf of a battery with a 0.15 Ω internal resistance if the battery delivers 1.5 A to an externally connected 5.0 Ω resistor?

    asked by Adam on February 14, 2011
  79. Physics

    3) What is the emf of a battery with an internal resistance of 0.15 if the battery delivers 1.5 A to an externally connected 5.0 resistors?

    asked by Anonymous on June 12, 2014
  80. physics

    An old battery with an emf of 9.0 V has a terminal voltage of 7.8 V when it is supplying a current of 1.5 mA. What is the internal resistance of the battery?

    asked by mercedes on February 24, 2014
  81. Physics

    A 12 v battery has a capacity of giving 80 amperes of current for one hour. How long can the battery keep a 60W lamp on?

    asked by Tamax on October 8, 2016
  82. Physics

    A battery (ε= 10.0V, r = 0.50Ω) is connected to three light bulbs in series (R1= 15.0Ω, R2= 21.0Ω, R3= 24.0Ω). Calculate the current delivered by the battery.

    asked by kitty on December 13, 2018
  83. chem

    Suppose that a fully charged lead-acidbattery contains 1.50 of 5.00 . What will be the concentration of in the battery after 3.90 of current is drawn from the battery for9.00 ? \

    asked by paco on July 31, 2013
  84. math

    A car has a 12 volt battery. The engine has a resistance of 0.22 ohms. How many amps will be drawn from the battery when the key is turned?

    asked by Leo on June 17, 2012
  85. current physics

    when dealing with circuits, and you say "the voltage across the battery" and "a current through the battery" what do the words across and through mean.

    asked by Anonymous on February 5, 2009
  86. English

    I have to write a poetry analysis paper. I do not know how to start the first paragraph. Do I startwith telling the teacher what I'm writing on and then go into the different parts or should i take another approach? I'll give you some of the best links

    asked by ABC on April 20, 2007
  87. Science

    A 6.0 volt battery is hooked up to a light bulb, whose resistance is 3.1 ohms. How many electrons would leave the battery per second? (Hint: 1 electron = 1.6E-19 C)

    asked by David on September 28, 2009
  88. Physics

    A battery has an internal resistance of 0.017 Ù and an emf of 9.00 V. What is the maximum current that can be drawn from the battery without the terminal voltage dropping below 8.75 V?

    asked by Don on February 23, 2013
  89. Physics

    When does the potential difference between the two terminals of the battery be zero? I think it will be zero if the battery is consumed entirely or when the circuit is open. I thought a lot but have no good answer, please help

    asked by Asmaa khalaf on December 21, 2015
  90. electric circuit

    a 12 V battery is made of 36 cells each rates at 2V and 1.5 A for a given duty cycle. what is the line current and power that may be drawn from the battery? Tnx :)

    asked by Anne on July 11, 2014
  91. physical

    A battery of e.m.f 24v and internal resistance of 4ohms is connected to a resistor of 3ohms.what is the terminal potential difference of the battery

    asked by vincent on March 6, 2011
  92. electric circuit

    a 12 V battery is made of 36 cells each rates at 2V and 1.5 A for a given duty cycle. what is the line current and power that may be drawn from the battery? Tnx :)

    asked by Anne on July 12, 2014
  93. physics

    A battery has an internal resistance of 0.016 and an emf of 9.00 V. What is the maximum current that can be drawn from the battery without the terminal voltage dropping below 8.75 V?

    asked by Anonymous on March 22, 2012
  94. Electricity

    A battery is connected to the endpoints A and B of a homogeneous wire. Using an ammeter one finds that a current I = 1.5 A flows through the conductor. Then, the wire is bent in the form of a circle and the same battery is connected to points A and B. What

    asked by Anonymous on December 9, 2013
  95. Physics

    A bulb is joined to a battery of e.m.f 6V. A steady current of 0.5 A flows through circuit. Calculate the total energy provided by the battery in 5 minutes.

    asked by paresh on February 11, 2016
  96. physics

    4. A bulb is joined to a battery of e.m.f 6V. A steady current of 0.5 A flows through circuit. Calculate the total energy provided by the battery in 5 minutes.

    asked by paresh Ghosh on February 4, 2016
  97. physics

    A 2600-pF air gap capacitor is connected to a 9.0 V battery.If a piece of pyrex glass is placed between the plates,how much charge will then flow from the battery?

    asked by jenish on February 4, 2008
  98. physics

    An old battery with an emf of 9.0 V has a terminal voltage of 7.8 V when it is supplying a current of 1.5 mA. What is the internal resistance of the battery? 800 Ω 900 Ω 400 Ω 600 Ω

    asked by mercedes on February 24, 2014
  99. physics

    Suppose a battery output a voltage of 9 volt. Calculate how many joules of energy are imparted to every individual electron moving through this battery?

    asked by Abhijit on May 22, 2013
  100. Physic

    Why is the potential difference between the terminals of a battery is not always equal to the e m f of a battery

    asked by Kenah on April 3, 2014