LecturePLUS Timberlake1 Chapter 11 Energy Energy.

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Presentation transcript:

LecturePLUS Timberlake1 Chapter 11 Energy Energy

LecturePLUS Timberlake2 Energy Makes objects move Makes things stop Energy from sun plants foods we eat energy to live We need energy to “do work”

LecturePLUS Timberlake3 Work is done when Go up stairs Play soccer Lift a bag of groceries Ride a bicycle Breathe Heart pumps blood Water goes over a dam

LecturePLUS Timberlake4 Potential Energy Is stored energy Examples Water behind a dam Compressed spring Chemical bonds in gasoline or coal Food

LecturePLUS Timberlake5 Kinetic Energy Is energy of motion Examples Hammering a nail Water flowing over a dam Working out Boxing Burning gasoline

LecturePLUS Timberlake6 Some Forms of Energy Mechanical Electrical Thermal (heat) Chemical Radiant (light)

LecturePLUS Timberlake7 Learning Check E1 A. A car uses more fuel when the air conditioner is on. True (1) or False (2) B. An apple hanging on a tree has potential energy that can turn into both mechanical or chemical energy. True (1) or False (2)

LecturePLUS Timberlake8 Solution E1 A. A car uses more fuel when the air conditioner is on. True (1) B. An apple hanging on a tree has potential energy that can turn into both mechanical or chemical energy. True(1)

LecturePLUS Timberlake9 Learning Check E2 Suppose you place water in a freezer. A. The water particles move 1) faster 2) slower 3) the same B. The water will get 1) hotter 2) colder 3) stay the same C. The temperature of the water will be 1) higher 2) lower 3) the same

LecturePLUS Timberlake10 Solution E2 Suppose you place water in a freezer. A. The water particles move 2) slower B. The water will get 2) colder C. The temperature of the water will be 2) lower

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