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Newspaper articles often have statements such as "10 000 volts of electricity surged through the victim's body." What is wrong with this statement?

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Rochelle Enrera
Rochelle EnreraLv10
11 Nov 2020

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Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

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A blood transfusion is being set up in an emergency room for anaccident victim. Blood has a density of 1060 kg/m3 and a viscosityof 4.00 10-3 Pa·s. The needle being used has a length of 3.0 cm andan inner radius of 0.25 mm. The doctor wishes to use a volume flowrate through the needle of 4.70 10-8 m3/s. What is the distance habove the victim's arm where the level of the blood in thetransfusion bottle should be located? As an approximation, assumethat the level of the blood in the transfusion bottle and the pointwhere the needle enters the vein in the arm have the same pressureof one atmosphere. (In reality, the pressure in the vein isslightly above atmospheric pressure.)
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During 4 hours one winter afternoon, when the outside temperaturewas 11° C, a house heated by electricity was kept at 24° C with theexpenditure of 58 kwh (kilowatt·hours) of electric energy.

(a) What was the average energy leakage in joules per second(watts) through the walls of the house to the environment (theoutside air and ground)?

(b) The rate at which energy is transferred between two systems dueto a temperature difference is often proportional to theirtemperature difference. Assuming this to hold in this case, if thehouse temperature had been kept at 27° C (80.6° F), how many kwh ofelectricity would have been consumed?

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