Suppose that the aorta has a radius of about 1.25 cm and that the typical blood velocity is around 30 cm/s
and that it has an average density of 1050 kg/m^3.
(a) What is the average blood velocity in the major
arteries if the total cross-sectional arca of the major
arteries is 20 cm^2,
(b) What is the total flow rate?
(c) If the blood in the circulatory system goes through
the capillaries, what is the total cross-sectional area
of the capillaries if the average velocity of the
blood in the capillaries is 0.03 cm/s?
(d) If a typical capillary has a cross-sectional area of 3
X 10^-11 m^2. about how many capillaries are there
in the human body?
(e) What is the kinetic energy per unit volume for blood
in the aorta, the major arteries, and the capillaries?
(f) If a capillary has an average length of 0.75 mm
what is the average time that a red blood cell
remains in a capillary?

Ablock of steel has a density of 0.29lbs per cubic inch. if the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight? a. 0.29lbs b. 0.58lbs c. 0.87lbs d. 1lbs

High schoolphysics 5+3 pts a neon light consists of a glass tube with metal wires at each end. when connected to a high-voltage source, the gas glows. if a fly lands on the glass tube, what will most likely happen? a) the fly will not feel a shock because the glass conducts any free electrons back into the gas. b) electrons will flow directly from the metal wires along the glass and shock the fly. c) the fly will not feel a shock because the glass insulates it from the electrons in the gas and the metal. d) electrons that are moving through the gas will be conducted through the glass and shock the fly.

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit