?Why is lead poisoning a concern in regard to older buildings and what are its symptoms?
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What will be an ideal response?
Lead paint found in older buildings can poison construction workers doing remodeling or additions. Common symptoms of lead poisoning include stomach cramps, nausea, loss of appetite, headache, and joint and muscle aches.?
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PROBLEM 2.28 The length of the -in.-diameter steel wire CD has been adjusted so that with no load applied, a gap of exists between the end B of the rigid beam ACB and a contact point E. Knowing that determine where a 50-lb block should be placed on the beam in order to cause contact between B and E.
Why are transformers rated in volt-amperes (VA) rather than in power (watts)?
What will be an ideal response?
Which of the following is NOT true of forward-bias in a diode?
A. Free electrons in the N-material and holes in the P-material both move toward the junction. B. N-material electrons move across the junction to fill the holes in the P-material. C. Negatively charged holes left behind in the N-material attract electrons from the negative voltage source. D. The free electrons that moved into the P-material continue to move toward the positive voltage source.
Which type of cell division causes the zygote to divide?
A. Meiosis B. Simple C. Mitosis D. Copulation