Which of the following are NOT true about magnetism? Select one or more:

a. Materials that are attracted to a magnet are called magnetic because they have North and South poles.

b. Magnetism is the same thing as electricity.

c. Magnetism is a contact force.

d. Any magnet that is cut in half will give two separate magnets, each with its own North and South poles.

e. The north and south poles of a magnet have a direct
correlation to positive and negative charges.

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?