On this day the spin axis of the earth is tipped directly toward the Sun and Northern Hemisphere receives the most direct sunlight

a) autumnal equinox
b)summer solstice
c)winter solstice

b)summer solstice

Physics & Space Science

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To change mercury into gold, a pair of protons must be

A) removed from the mercury nucleus. B) added to the mercury nucleus. C) either of these D) neither of these

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Physics & Space Science

Which of the following scenarios would NOT demonstrate the usefulness of a spacetime diagram?

Determining whether an event separated in space and time can affect a future event Telling whether clocks are synchronized Showing how inertial frames affect simultaneity Examining the twin paradox problem Answer not shown

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Physics & Space Science

When you interchange your emitter for one with a smaller work function, you measure

A. An increased current B. A decrease in the necessary stopping voltage C. An increase in the necessary stopping voltage D. No change in either current or stopping voltage E. Either a or c. You cannot determine which from the information given.

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Physics & Space Science

The speed of light in a vacuum divided by the speed of light in a material is equal to the index of _________for the material.

Fill in the blank(s) with the appropriate word(s).

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Physics & Space Science