Where is dark matter found in the periodic table?

A) within the noble gas elements
B) the transition metals
C) all radioactive elements
D) no where at all


Answer: D

Physics & Space Science

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Saturn's rings are composed of icy particles

Indicate whether the statement is true or false

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A current-carrying loop of wire experiences no tendency to rotate in a magnetic field when

A) field lines pass directly through the loop. B) no field lines pass through the loop. C) none of these

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The magnetic quantum number m1 can have any integer value ranging from

A) -n to +n. B) -? to +?. C) 0 to n. D) 0 to ?. E) 0 to (n-1)

Physics & Space Science

Three long wires parallel to the x axis carry currents as shown. If I = 20 A, what is the magnitude of the magnetic field at the origin?



a.
37 ?T

b.
28 ?T

c.
19 ?T

d.
47 ?T

e.
58 ?T

Physics & Space Science