find the force of a bacteria of velocity 20nmμs-1 in the bloodstream of a patient along a vein of length 1mm, if the mass of the bacteria is o.o1μg.

Question

konradzuse · Answer

Force is in N, do you know the formula?

anonymous · Answer

F=ma, that's all i know

konradzuse · Answer

what exactly is velocity 20nmμs-1 ???

konradzuse · Answer

@TuringTest

anonymous · Answer

its the rate at which the bacteria is travelling 20 newton metres, and the μ is the symbol for mu,,,,,i'm not really familiar with these units

anonymous · Answer

hello?????!!!!!!!!!!!!

ghazi · Answer

$$V= \frac{ 20 * 10^ {-9}}{ 10^{-6} }=20*10^{-3} m/s$$ and length = 0.001 m now firstly, find the acceleration using the relation $$U^2=2*a*D$$ where D is distance $$a=\frac{ U^2 }{ 2D }=(20*10^{-3})/2*10^{-3}=10 m/s^2$$ now 
force F=mass * acceleration$$F= 10^{-8}* 10= 10^{-7} N$$ = 10^(-7) N
hope this helps you and remember every power is negative :D

anonymous · Answer

thank you sooooo much!!!!!!!!!!!!11

ghazi · Answer

:D YW

anonymous · Answer

what's the correct way of writing  10^(-7) N?

ghazi · Answer

|dw:1359595444224:dw|

anonymous · Answer

oh ok and one more thing is that a multiplication sign?

ghazi · Answer

NO, that is power of 10 or exponent of 10

anonymous · Answer

i meant this

ghazi · Answer

i dont know what you meant

anonymous · Answer

sorry i tried to draw i meant the sign between the 20 and 10(-7) at the first part where you calculated velocity

ghazi · Answer

thats multiplication hope you have seen it for multiplication thing

anonymous · Answer

oh ok thanks for you help! my teacher is a hand full he's so unfair!

ghazi · Answer

its okay :)

anonymous · Answer

ok take care bye! i now know who to come for when i need help

ghazi · Answer

see ya :)