Light waves travel fastest in

a. water.
b. glass.
c. a vacuum.
d. air.
e. none of these; they travel at the same speed in all these media.


c

Physics & Space Science

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the electric force on the proton

A. The vector points in the +x direction. B. The vector points in the -x direction. C. The vector points in the +y direction. D. The vector points in the -y direction. E. The vector points in the +z direction. F. The vector points in the -z direction. T. The vector is zero.

Physics & Space Science

When is the north polar axis tilted most toward the Sun?

What will be an ideal response?

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What is the orbital radius of the excited state in the Bohr model of the hydrogen atom? The ground-state radius of the hydrogen atom is 0.529 × 10-10 m

A) 0.477 nm B) 0.159 nm C) 0.382 nm D) 0.549 nm

Physics & Space Science

One end of a rope is pulled with 100 N, while the opposite end also is pulled with 100 N. The tension in the rope is

A) 0 N. B) 50 N. C) 100 N. D) 200 N.

Physics & Space Science