Name: Sec.# ( 8) ---Quiz ( 1)-Ch(1) S.N:
ID : Phys 101 ( Term 041)-( F. Enaya)
Show your steps
clearly for full credit.!!
Q.1: The final velocity of a drop of water falling
through the atmosphere is given by: v = (2/9)(r2 g ρ/ n) where
v is the velocity of the drop in m/s; r is the radius in m; g is the
acceleration due the gravity in m/s2; and ρ is the density of
the water in kg/m3. What must be the unit of n, the coefficient of
the velocity of the air which the drop falls?
In units :
n
= ( r2 g r )/ v = (m2
. m . kg/m3)/(m/s) =
(kg/s . m )
Q.2: Speed
of the sound is 340 m/s. Express this in mile per hour. ( 1 mile = 1609 m)
