Before a thunder storm, clouds in the sky likely become

A) conducting.
B) polarized.
C) grounded.
D) a field-free region.


Answer: B

Physics & Space Science

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Ancient astronomers often saw certain planets viewed, while viewed from Earth, slowly stop and then move westward, of which they called this movement _______________

Fill in the blank(s) with correct word

Physics & Space Science

Lake Superior has a shoreline of length 2726 miles. What would be its area in if it were a perfectly circular lake? One mile is 1.609 km.

A.
B.
C.
D.
E.
F.

Physics & Space Science

Neon atoms in a glass tube can be excited

A) once per atom. B) repeatedly. C) by infrared light.

Physics & Space Science

A lighted candle is 10 m away from a wall. A concave mirror is being used to project an image of the candle onto the wall. If the image is going to be 3.0 times the size of the object, how far should the mirror be from the wall?

A) 6.5 m B) 7.0 m C) 6.0 m D) 5.5 m E) 15 m

Physics & Space Science