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Physics is not a discipline, but a way of looking at the world. See if you can use your sense of the world to explain everyday phenomena.

As shown in the video above, a small domino can knock over a bigger domino that is taller, and heavier than itself. Subsequent dominos can do the same, so that eventually, the chain knocks down a domino of any height (even one as tall as the Eiffel Tower). How is this possible?

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Are any of the penguins in the huddle above losing more heat more quickly than they would if they were standing alone?

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What would happen to the temperature in an isolated room if a refrigerator is turned on and the door is left open?

**Assumptions and Details**

- By isolated, we mean that the room is perfectly insulated, and loses no energy to the outside world.

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You have a flat-bottomed paper cup filled with water and you heat it from below with the flame from a bunsen burner. Does the cup catch fire?

**Assumptions**

- We are thinking about the period in which the cup still contains water.

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As shown in the picture, water flows from the bottle into the cup. What explains this phenomena?

**Assumptions**

- The average height of the plane above the ground is constant.

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