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KINETIC ENERGY QUICK CHECK

1What is kinetic energy?
ANSWER:the energy of motion
2.A fisherman in a boat is drinking a cup of hot coffee. The large lake below his boat is full of cold water. Which statement is an accurate comparison of the lake water and the coffee?
ANSWER:The lake will have more total thermal energy, but the particles in the coffee will be moving faster.
3.The gallium in the image is melting in the person’s hand. Which changes will occur on a microscopic level?
ANSWER:The gallium atoms will gain potential energy, moving freely from each other.
4.Which object will have particles with the highest average kinetic energy?
ANSWER:a drop of water at 90°C
5.Thermal energy is transferred to a substance. Which change can occur?
ANSWER: The particles can gain potential and kinetic energy.

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