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Why do you not feel Earth's enormous speed?

On a smooth train, a high speed can feel unremarkable until the train brakes or turns. Motion and a change in motion are different quantities. That distinction helps make sense of Earth’s enormous speeds, although Earth also rotates and orbits, so its motion must not be described as having zero acceleration.

3–7 min

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  • Why can turning at constant speed still count as acceleration?

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Physics

Why metal can feel colder than wood

A metal handle and a wooden tabletop can share a room temperature yet feel quite different. The clue lies in the exchange of heat between your hand and the surface, which is not the same thing as measuring temperature.

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Why metal can feel colder than wood

Physics5–7 minA metal handle and a wooden tabletop can share a room temperature yet feel quite different. The clue lies in the exchange of heat between your hand and the surface, which is not the same thing as measuring temperature.

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4–5 min

How can headphones fight noise with more sound?

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Physics

How can a ship made of steel float?

A solid piece of steel sinks, yet a steel ship can carry people and cargo. Its hollow shape changes how much water the whole vessel can push aside, making the material alone an incomplete explanation of floating.

3–5 min

How can a ship made of steel float?

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