19. Fluid Mechanics

A cylindrical specimen of brass has a diameter of $20 \mathrm{mm}$ and a height of $100 \mathrm{mm}$. If its mass is $0.27 \mathrm{kg}$, what is the density of the brass in $\mathrm{kg}/m^3$?

Which of the following statements about air is correct?

How can you use an object's $\mathrm{mass}$ and $\mathrm{volume}$ to predict whether it will sink or float in water?

Which statement is true about the mass and volume of all objects that sink when placed in water?

The 30-cm-long left coronary artery is 4.6 mm in diameter. Blood pressure drops by 3.0 mm of mercury over this distance. What are the (a) average blood speed and (b) volume flow rate in L/min through this artery?

If you have two solid steel spheres and sphere $2_{}$ has twice the radius of sphere $1_{}$, how does the density of sphere $2_{}$ compare to that of sphere $1_{}$?

How does the shape of an object affect the method used to measure its $Volume$?

Which phrase best describes air density?

Why does cold air tend to sink in the atmosphere?

Which of the following best describes the relationship between $T$ (air temperature) and $\rho$ (air density)?

Given that the volume of an object is $5\mathrm{cm}{3}^{}$ and its mass is $55g$, what is its density in $g/\mathrm{cm}{3}^{}$?

A wooden door is 1 m wide, 2.5 m tall, 6 cm thick, and weighs 400 N. What is the density of the wood in g/cm³? (use g = 10 m/s²)

Suppose an 80 kg (176 lb) person has 5.5 L of blood (1,060 kg/m³ ) in their body. How much of this person's total mass consists of blood? What percentage of the person's total mass is blood?