Chapter 20: Q28CQ (page 732)
Could a person on intravenous infusion (an IV) be microshock sensitive?
Yes, a person on intravenous infusion (an IV) cab be microshock sensitive because of IV ions.
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If the 0.100mm diameter tungsten filament in a light bulb is to have a resistance of at, how long should it be?
Explain the properties of myelinated nerves in terms of the insulating properties of myelin.
Integrated Concepts
What current must be produced by a \({\rm{12}}{\rm{.0 V}}\) battery-operated bottle warmer in order to heat \({\rm{75}}{\rm{.0 g}}\) of glass, \({\rm{250 g}}\) of baby formula, and \({\rm{3}}{\rm{.00 \times 1}}{{\rm{0}}^{\rm{2}}}{\rm{ g}}\) of aluminium from \({\rm{20}}{\rm{.0}}^\circ {\rm{C}}\) to \({\rm{90}}{\rm{.0}}^\circ {\rm{C}}\) in \({\rm{5}}{\rm{.00 min}}\)?
Explain why for the temperature variation of the
resistance R of an object is not as accurate as which gives the
temperature variation of resistivity .
Show that the units \(1\;{V^2}/\Omega = 1\;W\) , as implied by the equation \(P = {V^2}/R\).
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