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Physics Test Four

# Physics Test Four - Physics Test Four Chapter 15 When you...

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Physics Test Four Chapter 15 When you touch a cold piece of ice with your finger, energy flows from your finger to the ice Iron normally warms up faster than wood, water or glass Heat energy is measured in units of calories and joules Compared to a giant iceberg, a hot cup of coffee has higher temperature, but less internal energy Ice tends to form at the surface of bodies of water When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. The reason for this is copper expands more than iron Equal volumes of water at 4 degrees C expands most compared to equal volumes of helium, wood or iron If the temperature is slightly increased in a sample of water of 0 degrees C, the volume of the water decreases During a very cold winter, water pipes sometimes burst. The reason for this is water expands when freezing The temperature at the bottom of Lake Tahoe, high in the Sierra Nevada Mountains in CA, at this moment is 4 degrees C Heat energy travels from an object with a high temperature to an object with a lower temperature A substance that heats up relatively quickly has a low specific heat The moderate temperatures of islands throughout the world has much to do with the water’s high specific heat Before ice can form on a lake, all the water in the lake must be cooled to 4 degrees C When an iron ring is heated, the hold becomes larger

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Physics Test Four - Physics Test Four Chapter 15 When you...

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