The magnetic field b at the center of a circular coil of wire carrying a current i (as in fig. 20–9) is:
b = u0*ni/ 2r
where n is the number of loops in the coil and r is its radius. imagine a simple model in which the earth’s magnetic field of about 1g= (1 * 10 ^-4 t) near the poles is produced by a single current loop around the equator. roughly estimate the current this loop would carry.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.

the following is queen elizabeth’s purposes:

- to encourage the parliament that the technique of picking successors to the seat based merely on birthright needs to be reviewed.

- (not) to convince the parliament that her kid should not be measured as a likely choice for heir to the english power.

- to persuade the parliament that merely since she has a child does not assure that the kid will be a capable leader.

- to sway the parliament how shattering it could be if they proceeded discourteously concerning her or her child.

the answer is 12 as i may remember

: )