The radius of the aorta is ~ 10 mm = 10-2 m and the blood flowing through it has a speed ~ 300 mm/s = 0.3 m/s. a capillary has a radius ~ 4×10-3 mm = 4×10-6 m, but there are literally billions of them. the average speed of blood through the capillaries is ~ 5×10-4 m/s. (i) calculate the effective cross sectional area of the capillaries and (ii) the approximate number of capillaries.

0.00188 m²

37500000

Explanation:

= Area of aorta

Radius of aorta = 0.01 m

= Velocity of blood through aorta = 0.3 m/s

= Area of capillaries

= Velocity of blood through capillaries =

= Radius of capillaries =

From continuity equation as the mass is conserved

Effective cross sectional area of the capillaries is 0.00188 m²

Area of capillaries is also given by

The number of capillaries is 37500000

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

iron would move it is magnetic there is a mag field around the current in the wire