posted by Anonymous .
1) A small dense object is suspended from the rear view mirror in a car by a lightweight fiber. As the car is accelerating at 1.90 m/s 2, what angle does the string make with the vertical?
2) A patient is to be given a blood transfusion. The blood is to flow through a tube from a raised bottle to a needle inserted in the vein. The inside diameter of the 25 mm long needle is 0.80 mm and the required flow rate is 2.0 cm^3 of blood per minute. How high should the bottle be placed above the needle? Assume the blood pressure is 78 torr above atmospheric pressure. (Viscosity of blood = 4 x 10^-3 Pas, density of blood = 1.05 x 10^3 kg/m^3)
I think it might be sin-1(a/m)=11.18 degrees rounded.