1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy --> elastic

23,198 results
  1. Science - Please Help!!!

    when you turn on a battery powered flashlight, you transform A - Heat energy into light and chemical energy. B - Chemical energy into electrical energy and light. C - Heat energy into chemical energy and light D - Electrical energy and light energy into

  2. Science 6

    When you turn on a battery powered flashlight, you transform... A:heat energy into light and chemical energy. B:chemical energy into electrical energy and light. C:heat energy into chemical energy and light. D:eletrical energy and light energy into

  3. Physics -- check answers please

    1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy -->

  4. Physics multiple choice questions

    1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy -->

  5. Science 8

    When you turn on a battery-powered flashlight, you transform A.) Heat energy into light and chemical energy. B.) Chemical energy into electrical energy and light. C.) Heat energy into chemical energy and light. D.)Electrical energy and light energy into

  6. Science Help

    Which of the following statements describes the conservation od a natural resource? A. A factory burns coal to run its machines. B. A solar energy company harvests energy from sunlight. C. Lights in a house are turned off when not in use. D. A wind energy

  7. Physics multiple choice questions

    1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy -->

  8. 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

  9. Social Impact of Technology

    Which of these kinds of energy is a fundamental requisite for life on Earth? A. Electrical energy B. Solar energy C. Chemical energy D. Potential energy An -- C

  10. Algebra

    Which best describes your ability to work with transformations in the coordinate plane? A. I can graph translations, reflections, and rotations in the coordinate plane. I can use math vocabulary to describe these transformations. B. I can graph

  11. Science

    Which of the following statements describes the conservation of a natural resource? A. A timber company only cuts some trees down and replaces them with new trees. B. A solar energy company harvests energy from sunlight. C. A timber company cuts down all

  12. 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

  13. Science

    During the process of photosynthesis, solar energy is converted into: a. chemical energy. b. heat energy. c. thermal energy. d. mechanical energy. e. nuclear energy. a

  14. 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

  15. physics

    please check: A battery converts what type of energy into electrical energy? a. mechanical b. nuclear c. solar d. chemical D When a parallel-plate capacitor is connected to a battery:a____ is stored on one plate, and a ___ is stored on the other a.

  16. Science

    Which of the following is a problem with using solar power as a main source of energy? A. People do not yet have the technology to use solar power*** B. The sun is not close enough to provide solar energy C. Power from solar energy contains a large amount

  17. Science

    When you turn on a battery powered flashlight you transform... 1) heat into light chemical energy 2) chemical energy into electrical energy and light 3)heat into chemical energy and light 4) electrical energy and light energy into chemical energy

  18. Science

    What type of energy from the Sun do plants use to make their own food? A.Chemical Energy B.Sound Energy C.Light Energy D.Heat Energy C? An MP3 player uses the chemical energy in a battery to produce electricity energy. The electrical energy makes the

  19. 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?

  20. English

    To finish her environmental science research project, Giselle is compiling her data on the increase in popularity and use of solar energy. Which organization and style would be MOST appropriate to the task, purpose, and audience? A) a persuasive essay to

  21. Bio

    Which of the following best describes the influence of latitude on climate? A. Temperate regions receive more solar energy and heat per unit area than tropical regions. B. Polar regions receive less solar energy and heat per unit area than tropical

  22. Environmental Science

    Nuclear fission ____ atoms to create energy A. Heats B. Corrodes C. Splits D. Combines A machine that converts electrical energy into mechanical energy is called a _____ A. Generator B. Solar Panel C. Windmill D. Motor Nuclear power plants use the

  23. 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

  24. Physics

    A circuit is powered by a battery. Conventional current (positive current) flows ____________. a. out of the battery and into the circuit. It does not return to the battery. b. through the battery and the rest of the circuit. c. from the negative terminal

  25. science

    Which statement best describes what has happened to the battery’s energy?

  26. Algebra

    Which best describes your ability to work transformations in the coordinate plane? A.I can graph translations, reflections, and rotations in the coordinate plane. I can use math vocabulary to describe these transformations. B.I can graph translations,

  27. Science

    Which 6 are energy from sunlight?? nuclear energy,geothermal energy,tidal energy,fusion energy,wind,hydroelectric energy,solar energy,biomass,fossil fuels,ocean thermal,energy conversion

  28. physics

    A satellite circling the earth has an average power consumption of 370.0 W. Assuming 5.4% efficiency for conversion of solar energy to electrical energy, what area is required for the solar panels?

  29. science

    What enregy transformations take place in a solar impulse and a A320?

  30. Physics

    A solar panel (an assemblage of solar cells) measures 58 cm x 53 cm. When facing the Sun, this panel generates 2.7 A at 14 V. Sunlight delivers an energy of 1.0×10^3 W/m^2 to an area facing it. What is the efficiency of this panel, that is, what fraction

  31. 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

  32. physics

    At a certain location, the solar power per unit area reaching the Earth's surface is 180 W/m2 averaged over a 24-hour day. Suppose you live in a solar powered house whose average power requirement is 3.2 kW. At what rate must solar energy reach your solar

  33. physics help

    At a certain location, the solar power per unit area reaching the Earth's surface is 180 W/m2 averaged over a 24-hour day. Suppose you live in a solar powered house whose average power requirement is 3.2 kW. At what rate must solar energy reach your solar

  34. Science

    It’s OK to say that your brain is solar powered, because A) mitochondria in plant cells convert solar power to the chemical power that is used to run your brain. B) cellular respiration is powered by sunlight. C) the antenna complex in chloroplasts acts

  35. Science

    It’s OK to say that your brain is solar powered, because A) mitochondria in plant cells convert solar power to the chemical power that is used to run your brain. B) cellular respiration is powered by sunlight. C) the antenna complex in chloroplasts acts

  36. Science

    Use the terms solar, kinetic, electrical and potential energy gravitational energy to explain energy transformations used for renewable energy systems

  37. Science

    Give one example of a series of energy transformations. For example solar energy from a plant changes to kinetic energy in an animal's body and so on.

  38. 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)

  39. physics

    (a) A solar collector is 12.0% efficient in gathering solar energy and converting it to heat. If the average intensity of sunlight on one day is 700 W/m2, what area(m^2) should your collector have to gather energy at the rate of 150 W? (b) What is the

  40. SCIENCE

    What energy changes occur in a in a solar powered car?

  41. (One more science Question)

    This Is the last one I'm stuck on, I promise, I'm caught between c and d, I think... C right? Because Even If solar power Isn't available at night, Or when It's cloudy, there are ways of storing the energy you get, Right? Which of the following is a

  42. 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

  43. physics

    small toy car draws a 0.50mA from a 3.0 V nickel-cadmium(NiCd) battery. In 10 min of operation, (a) how much charge flows through the toys car? (b) How much energy is lost by the battery?

  44. 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

  45. Science

    You have been commissioned to design a stand]alone solar PV system (solar panels + battery array) for a 1000ft2 occupied between May through October, off]line cottage located near Corpus Cristi, Texas. The PV array should supply the daily average

  46. Science

    Does a solar powered calculator work when there is no bright light falling on the solar panel? Explain

  47. physics

    A circuit is powered by a battery. Conventional current (positive current) flows ____________. 2 points A.out of the battery and into the circuit. It does not return to the battery. B.through the battery and the rest of the circuit. C.from the negative

  48. English

    Why is the future of solar energy bright? 1. Every year, solar cells are becoming cheaper and better. Solar energy is also clean and it will never run out. 2. Because every year, solar cells are becoming cheaper and better, solar energy is also clean, and

  49. to ms.sue- science project part 1

    Please select one of the four solar-energy-based topics listed below to research. Based on your research you are to create a poster that details what you learned. Please make a bibliography of the resources that you used for your information, to go along

  50. 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

  51. English

    A: What do you think of a solar house. 1. I think the solar house makes money for us. 2. I think we can save energy thanks to the solar house. 3. I think we don't need to spend money on electricity. 4. I think we don't need to pay the electricity fee. 5. I

  52. Math

    While solar energy powered home systems are quite expensive to install, adding some passive energy features to conventional construction can make a substantial reduction in heating and cooling costs. Passive solar requires no machinery and uses the

  53. Math

    While solar energy powered home systems are quite expensive to install, adding some passive energy features to conventional construction can make a substantial reduction in heating and cooling costs. Passive solar requires no machinery and uses the

  54. Physics

    Does the solar powered calculator work when there is no bright light falling on the solar panel? Explain. I think it does but I don't know why please help explain this. Thank you

  55. Physics

    (a) calculate the energy in joules put out by a 9.0 V calculator battery that moves 3.0 C of charge through a handheld calculator after 1 hr of operation. (b) calculate the energy put out by a 12.0 V car battery that moves 1000 C of charge (as it may when

  56. science

    I had objects that I had to find the source energy then what it was converted to. Please check my answers: battery Powered Drill chemical--> mechanical and thermal Lava Lamp Electrical--> thermal and nuclear

  57. Science

    when you turn on a battery powered flashlight, you transform A - Heat energy into light and chemical energy. B - Chemical energy into electrical energy and light.*** C - Heat energy into chemical energy and light D - Electrical energy and light energy into

  58. to ms.sue-science project part 1

    so is the project basically asking to write down details abd information i learned about solar cars and to write down the websites? please read this and describe to me: Please select one of the four solar-energy-based topics listed below to research. Based

  59. Essential Algebra Readiness

    Which best describes your ability to work transformations in the coordinate plane? A.I can graph translations, reflections, and rotations in the coordinate plane. I can use math vocabulary to describe these transformations. B.I can graph translations,

  60. 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)

  61. energy

    it is an expression that describes the sun, the electricity, oil and the wind solar, nature, or energy

  62. Science Project Question

    Soooooo, I have a science project where I have to either create a house, OR A car, powered by solar energy, and then answer questions like, Which renewable energy sources did you use What are the advantages of using those energies So, I guess I just dont

  63. English

    I have an test on these and I do not want to fall the test. Please tell me a ways I can study, online tests etc so that I can pass it. Thank you and I appreciate for your help! They are: They will be fill in the blanks, multiply choices. (1)Petroleum (2)

  64. Physical Science

    What is the apparent contradiction in the statement that "solar energy is free" with the fact that solar cells are too expensive to use as an energy source.

  65. 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

  66. Science Help

    Please help , I need to make a solar powered car. Where would I be able to get 3v motors ?

  67. SCIENCE PLZZ HELP

    Which 6 are energy from sunlight?? nuclear energy,geothermal energy,tidal energy,fusion energy,wind,hydroelectric energy,solar energy,biomass,fossil fuels,ocean thermal,energy conversion

  68. physics

    At a certain location, the solar power per unit area reaching Earth's surface is 200 W/m^2, averaged over a 24-hour day.If the average power requirement in your home is 2.8 kW and you can convert solar power to electric power with 8.0 % efficiency, how

  69. physics

    At a certain location, the solar power per unit area reaching Earth's surface is 200 W/m^2, averaged over a 24-hour day.If the average power requirement in your home is 2.8 kW and you can convert solar power to electric power with 8.0 % efficiency, how

  70. physical science

    Trace the energy transformations from gasoline in a car to sound from the radio playing hitting your ears. There should be 4 transformations. please help me i only have a couple of hours left til i have to turn it in.

  71. physics

    A 1.50-V battery supplies 0.244 W of power to a small flashlight. If the battery moves 2.53 1020 electrons between its terminals during the time the flashlight is in operation, how long was the flashlight used?

  72. physics

    if there is a circuit that has a battery and a lightbulb: will an electron have more electric potential energy on the positive side of the battery or negative side of the battery? - i think its same because conservation of energy. energy gained by electron

  73. Science help

    Is a solar powered water filter considered a innovation a solution or what?

  74. 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

  75. English

    1. What do you think of a solar house? - I think the solar house makes money for us. - I think the solar house makes energy from the sun. - I think the solar house uses the sun to make energy. - I think the solar house uses the sun to make electricity. - I

  76. 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

  77. World History

    Which operation led to the Allied forces breaking through the Gothic Line? A) Operation Overlord B) Operation Torch C) Operation Olive D) Operation Barbarossa

  78. history

    Which operation led to the Allied forces breaking through the Gothic Line? Operation Olive Operation Torch Operation Overlord Operation Barbarossa A?

  79. Math 115

    While solar energy powered home systems are quite expensive to install, adding some passive energy features to conventional construction can make a substantial reduction in heating and cooling costs. Passive solar requires no machinery and uses the

  80. Health and science

    What problems could a solar powered pond water filter solve and what impact would it have on people?

  81. Science

    How might solar-powered buildings and cars reduce the amount of carbon dioxide that is added to the atmosphere?

  82. 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

  83. girls secondary school ikenegbu

    a capacitance of 6microfarad and another unknown capacitance are connected in series to a battery, if the potential difference between the battery terminals is 16v while over the unknown capacitance is 6v, find the magnitude of the unknown capacitance, the

  84. English

    Sunlight hits the solar cells on the backpack. The solar cells change sunlight into electricity. The electricity is stored in the battery. A cell phone or an MP3 player can be plugged into it. (In this passage, what does 'it' refer to in the last

  85. physics

    A solar collector is placed in direct sunlight where it absorbs energy at the rate of 780 J/s for each square meter of its surface. The emissivity of the solar collector is e = 0.76. What equilibrium temperature does the collector reach? Assume that the

  86. 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

  87. 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

  88. history

    What was the secret CIA operation to overthrow the Cuban Government called? Operation Seagull The Bay of Pigs operation Operation Mongoose Order 632 I think its operation mongoose?

  89. physics

    a solar panel is 12% efficient at converting sunlight into electrical energy.on average the sunlight that strikes the earth's surface has an intensity of 250 w/m^2 which of the following is the best estimate for the area of the solar panel needed to

  90. Science

    A house has solar panels on the roof. The solar panels created electricity, which is then used to power the home's heating system. Solar panels on roof The use of solar panels in this way contributes to what kind of heating? Select one: a. passive solar

  91. 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

  92. Physics

    A 12V car battery puts out 5400J of energy each second. How many coulombs of charge does this battery put out in one second?

  93. Science

    Facts about the sun are? I have 1. the only star in our solar system 2. sun spots are cooler areas on sun's surface 3. from solar energy 4.Solar flares 5. only star you see during the day 6.made of gas 7.closest star to our earth

  94. Science

    5.The process of desertification can occur when B.farmers use contour farming techniques C.an area of forest is clear-cut D.an area of forest is selectively cut 7.Which of the following statements describes the conservation of a natural resource? A.A

  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.

  96. 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

  97. Biology Photo efficency

    How do you calculate the photosynthetic efficiency ..the % of solar energy reaching vegetation in an ecosystem that is converted to GPP ??? I know the amount of sol energy, GPP, NPP etc... is it the GPP divided by the energy reaching the amount of solar

  98. physics

    I have to build a mini solar car for a school project and i have three solar cells that i bought. whenever i hook up the solar cells i get a reading between 1.5-1.8 volts, but when i hook it up to the motor it wont start it. According to the box the motor

  99. Biochemistry

    Just quickly, I need someone's opinion/facts of the knowledge: is hydroelectricity better than solar energy (or vise versa) and why? I know that h.e. is one of the ways that Ontario gets their energy, and that both are renewable. I also know that solar is

  100. Physics

    Where does the energy from a battery come from? When you use the battery to run a flashlight where does the energy go?

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