15

What reference clock is an atomic clock measured against?

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15

What is an electromagnetic wave exactly?

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15

How do charge carriers "know" how much voltage to use for work in a specific component?

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15

How can I know who is accelerating? – Inertial reference frames and relative motion

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15

Laser shining through two holes in distant rotating discs

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14

Why do we have momentum?

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14

Why can basis vectors change direction?

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14

Rolling without slipping violates $F=ma$?

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14

Is acceleration absolute and if so, how can we measure it?

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14

Energy Conservation in electromagnetism

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14

How do geodesics explain two identical balls thrown up at the different speeds?

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14

How is adding a charge outside a Gaussian surface consistent with Gauss' Law?

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14

What's incorrect with using the two formulas for Lorentz contraction and time dilation at the same time?

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14

Is angular momentum just a crutch?

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14

Cleanest mathematical description of objects which produce fields?

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13

Inertial and non-inertial frame of reference

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13

Is centripetal acceleration almost perpendicular to velocity or it is exactly perpendicular to velocity?

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13

Are energy and work the same thing?

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13

Does electric field have a speed itself?

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13

Why is centrifugal force called fictitious?

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13

How does the center of mass move forward on a rocking chair?

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13

Constant speed of light violates accelerating expansion of universe?

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13

If I suddenly store a lot of energy in a small space, this induces spacetime curvature. Does that create gravitational potential energy?

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13

Are Lorentz aether theory and special relativity fully equivalent?

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13

Does current pass through an ideal battery?

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13

What did Einstein mean in his 1905 paper when exposing the relativity of simultaneity?

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13

Rules of significant figures, precision, and uncertainty

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13

Difficulty for a fireman to hold a hose which ejects large amounts of water at a high velocity

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13

Why doesn't the variation of resistivity with temperature go both ways?

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12

Where does a black hole's event horizon form and when?

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