Provide evidence for the "domain theory" of magnetism.
What will be an ideal response?
Evidence of this "domain theory" is that if a magnet is heated, or hit repeatedly with a hammer, it loses its magnetism (the domains are jarred back into a random arrangement). Also, if an artificial magnet is left by itself, it slowly loses its magnetism. To prevent this loss, bar magnets should be stacked on top of each other with opposite poles together; keeper bars should be placed across horseshoe magnets. Both methods maintain the magnetic field.
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What is meant by the term block shear?
What will be an ideal response?
The floor plan includes as much information as possible without making it cluttered and hard to read.
Answer the following statement true (T) or false (F)
What is the purpose of the labyrinth seal (drum groove) used on a drum brake?
A) Keeps water out of the drum B) Reduces cooling C) Reduces noise D) Allows the shoes to collect dust
Edge-triggered flip-flops must have ________
A) at least two inputs to handle rising and falling edges B) active-low inputs and complemented outputs C) very fast response times D) a pulse transition detector