A wave has a frequency of 6 Hz, how long is the period?

A- 12
B- .17
C- 6
D- 36

A-4.60 μc charge is moving at a constant speed of 6.80×105 m/s in the +x−direction relative to a reference frame. at the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points.

Explain the consequences of this addiction to the brain tissue

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.