An atom's "atomic number" is

A) the number of protons in its nucleus.
B) the number of electrons orbiting the nucleus of the neutral atom.
C) Both of the above.
D) the number of electrons orbiting the nucleus of the ionized atom.
E) All of the above.


C

Physics & Space Science

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The most striking example of solar variability was the

A) Dust Bowl drought of the 1930s. B) Maunder Minimum from 1645-1715. C) Sporer Minimum that doomed the Anasazi. D) fall of Rome. E) Joseph's seven lean years in the Old Testament.

Physics & Space Science

If the length of a wire increases, its resistance __________

Fill in the blank(s) with correct word

Physics & Space Science

A long, straight wire carrying a current is placed along the y-axis

If the direction of the current is in the +y direction, what is the direction of the magnetic field due to this wire as you view it in such a way that the current is coming directly toward you? A) clockwise, around the x-axis B) counterclockwise, around the x-axis C) counterclockwise, around the z-axis D) counterclockwise, around the y-axis E) clockwise, around the y-axis

Physics & Space Science

A wheel rotating about a fixed axis has an angular position given by ? = 3.0 ? 2.0t3, where ? is measured in radians and t in seconds. What is the angular acceleration of the wheel at t = 2.0 s?

a. ?1.0 rad/s2 b. ?24 rad/s2 c. ?2.0 rad/s2 d. ?4.0 rad/s2 e. ?3.5 rad/s2

Physics & Space Science