If you have ever used a compass, you know that it can be used to navigate. it does this with a needle that always points north, so you know which direction you are heading. why does a compass needle point north?

a)due to the direction of the earth's orbit.
b)due to the influence of the earth's rotation.
c)due to the influence of the earth's magnetic field.
d)due to the influence of the earth's electric field.

The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery

To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin. answer in one word. part bfind e(r), the magnitude of the electric field at distance r from the point charge q. express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q. express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r