Serious doctor preparing a hypodermic needle in an office , Healthcare workers in the Coronavirus Covid19 pandemic

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Q12.6A nurse must apply thumb pressure p to administer aninjection of a viscous liquid using a hypodermic needle with asmall inside radius R. If instead the nurse uses a needle of thesame length but with an even smaller inside radius R/2, howmuch thumb pressure will be required? (Assume that thevolume flow rate is to be the same as with the first needle.)A. 1.414pB. 2pC. 4pD. 8pE. 16p2016 Pearson Education Inc