What is 2x10-4cm converted to metres?

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what is 2x10-4cm converted to metres?

2x10-5 or 2x10-6?

Thanks
 
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multiply by this conversion factor:

1 = 1m/100cm
 
it is better for you to familiar with these

cm=10^-2m
mm=10^-3m
um = 10^-6m
nm=10^-9m

It helps you when you calculate...
 
cheers
 
Thread 'Variable mass system : water sprayed into a moving container'
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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