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Solar cells convert what type of energy into electrical energy? A. thermal B. electromagnetic C. chemical D. nuclear

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Energy is the abiltiy to do work which causes changes in

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A 3 kilogram cat is resting on top of a bookshelf that is 3 meters high. What is the cat’s gravitational potential energy relative to the floor? ____ Joules

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Fossil fuels currently account for the majority of the world’s energy use because they are A. distributed evenly throughout the world. B. nonpolluting. C. renewable energy resources. D. relatively inexpensive and readily available

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A blender uses 1,500 joules of energy in 5 seconds. What is the power rating of the blender?

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The scattering of a stream of positively charged particles when striking a thin film of gold confirms thatthe positive charge in an atom must be located in a dense central mass. atoms contain electrons in varying energy layers around the nucleus. electrons are found in the center of an atom. electrons can only be found within predicted areas surrounding the nucleus.

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Using a cathode ray tube, Thomson confirmed that atoms must have an overall positive charge. atoms are made of particles that have a negative charge. electrons in atoms must have varying amounts of energy. electrons are only found in the nucleus.

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The temperature of water in a beaker is 45°C. What does this measurement represent? the heat capacity of water the total thermal energy of water the average kinetic energy of water particles the total kinetic energy of water particles

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What’s the kinetic energy of the object? Use . Erica is competing in the shot put event at a track meet. She hurls a shot with a mass of 4 kilograms at a speed of 9 meters/second. The shot’s kinetic energy is joules.

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Which of the following is an example of kinetic energy? a boy resting on a park bench a book sitting on a shelf a rubber band stretched as far as it can go a swing moving back and forth

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The mass of a moving object increases, but its speed stays the same. What happens to the kinetic energy of the object as a result? It decreases. It increases. It remains unchanged. It fluctuates up and down.

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The mass of a moving object increases, but its speed stays the same. What happens to the kinetic energy of the object as a result? It decreases. It increases. It remains unchanged. It fluctuates up and down.

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Generators need a source of energy to produce electricity. Which form of energy is a nonrenewable source of energy? hydro (water) energy geothermal energy fossil fuel wind energy

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Which device is using a motor? A water heater creates heat energy from electric energy. A waterfall rotates a waterwheel to turn an axle. A body massager uses electric energy to move back and forth. A solar charger creates electric energy from the Sun.

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Which device is using a motor? A water heater creates heat energy from electric energy. A waterfall rotates a waterwheel to turn an axle. A body massager uses electric energy to move back and forth. A solar charger creates electric energy from the Sun.

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The ______________ theory treated thermal energy as a kind of liquid heat.

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The thermal energy of a system is the ____________ kinetic energy of its particles.

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If thermal energy is removed from a system, its temperature usually decreases. a)True b)False

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What is the energy in joules of a photon with a frequency of 3.16e 12 s-1?

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If a steam engine produces work, how does the internal energy of the machine change?

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Which force is the more dominant one in the hydrogen atom, the gravitational or the electrical? by what factor?

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The particles of a solid are linked together in a network. if the temperature of the solid increases, the particles gain energy. if they gain enough energy, the particles can break free of the network. then, they are able to move around more freely.in the event described above, what kind of change is taking place?

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What is the equation for potential energy

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A cat has a mass of 3 kg and runs at a speed of 6 m/s. how much kinetic energy does the cat have? a. 108 J b. 9 J c. 75 J d. 54 J

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Why is it important to develop alternative sources of energy?

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The measure of the average kinetic energy of the particles of a substance is the ______.

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Which of the following is an example of electrical energy being converted to chemical energy? A. A storage battery is charged using an electric current. B. An electric furnace begins to emit heat to warm a house. C. The wheels on a machine begin to turn and move a conveyer belt. D. A loudspeaker, which is plugged in to the wall, begins to project sound.

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Which of the following advances in food production were attributed to the Green Revolution of the 1960s and 1970s? A. use of crops for biofuels and bioplastics B.improved land availability C.improved irrigation systems D. drought-resistant varieties of crop plants

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Which equation correctly relates kinetic energy,mass,and velocity?

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Which electric component provides energy to the circuit of a flashlight? battery motor resistor switch

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