Chemical energy in burning wood is changed into thermal energy. The thermal energy is absorbed by water, which boils to produce steam. The thermal energy is changed into kinetic energy in the moving steam. The kinetic energy is used to turn a turbine, which converts the kinetic energy into electricity. Which sentence best describes this system?
A cyclist eats a full meal before going to ride a bike for 2 hours. Which energy transformation happens during this process?
Which form of energy is directly related to the measure of the average kinetic energy of the particles in a substance?
What type of energy is the sum of an object’s potential and kinetic energy?
A baseball player hits a ball. Which is the best description of the energy of the ball as it flies over the pitcher’s head?
In a chemical reaction occurring in an open beaker, the reactants have a mass of 10.0 g and contain 1000 J of energy. The products in the beaker contain a mass of 5.0 g and 500 J of energy. Which best explains the difference in energy and mass as reactants are converted to products?
An arrow is fired at a target on a high wall. How does the energy change between the moment the arrow is fired and the moment it hits the target?
Which is the best term to use when describing the energy of motion?
A generator contains a coil that spins to produce an electric current. How is energy transformed by using a generator?
Old photographic flashbulbs burn magnesium metal in a reaction that causes a flash of brilliant white light. A photographer would need to take care not to suffer burned fingers when trying to replace the hot bulb. What best identifies the energy transformation that occurs in the flashbulb?
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