10. Wearing the face mask can provide a critical barrier, reducing most infectious
viruses during coughing, especially of asymptomatic people and those with mild
symptoms of COVID-19. Please calculate the force of cough flow acting on the mask.
Assume the mask perfectly covers the mouth. The velocity of cough flow is 10 m/s
and the opening of the mouth is 1 cm in diameter.
(A)0.001 N
(B) 0.01 N
(C) 0.1 N
(D)1N
(E) 10 N
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