Why can't the bubbles that make up porosity be seen??

What will be an ideal response?


The bubbles that make up porosity cannot be seen because they most often form below the weld metal as it cools.?
 

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If the low air pressure warning signal comes on in a vehicle with air brakes the driver should

Air brakes

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The symbol frequently used to mark a poison is a _____.

a. red triangle b. yellow star c. skull and crossbones d. letter X

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What is the color code used to identify a radioactive area?

What will be an ideal response?

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Find the impulse response h (t) of the continuous-time system described by y (t) + ?y(t) = x (t). For what values of ? is this system BIBO stable?

What will be an ideal response?

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