The difference between paper chromatography and thin layer chromatography is that:
a. paper chromatography uses capillary action, while tlc uses a silica gel.
b. paper chromatography uses capillary action, while tlc uses a stationary and mobile phase.
c. paper chromatography separates dyes based on mass, while tlc separates dyes based on charge or solubility.
d. paper chromatography separates an insoluble solid from a liquid, while tlc separates a solvent from its solution.

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation:

the higher the current the higher the mag field around it the higher the influence on the compass

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west