Your heart pumps blood at a pressure of 100 mmhg and flow speed of 60 cm/s. at your brain, the blood enters capillaries with such a large total cross-sectional area that the blood velocity is much smaller: about 0.7 mm/s. ignore viscosity in the capillaries. how long could your neck be so that blood still reaches your brain in m

1.28 m

Explanation:

Generally, pressure of fluid is given by

where g is acceleration due to gravity, h is the height and is the density

Considering that the pressure for mercury is same as for blood only that the height and density of fluid are different then

Since g is constant, then

Making the subject of the formula then

Where subscripts m and b denote mercury and blood respectively

Assuming density of blood is 1060 Kg/m3, density of mercury as 13600 Kg/m3 and substituting height of mercury for 0.1 m then

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2