Questions from Modern Physics

Q: If the aorta (diameter da) branches into two equal-

If the aorta (diameter da) branches into two equal-sized arteries with a combined area equal to that of the aorta, what is the diameter of one of the branches? (a) √

Q: What is total volume of the gas-exchanging region of the

What is total volume of the gas-exchanging region of the lungs? (a) 2000 mm3; (b) 2 m3; (c) 2.0 L; (d) 120 L.

Q: If we assume that alveoli are spherical, what is the diameter

If we assume that alveoli are spherical, what is the diameter of a typical alveolus? (a) 0.20 mm; (b) 2 mm; (c) 20 mm; (d) 200 mm.

Q: Individuals vary considerably in total lung volume. Figure P1.94

Individuals vary considerably in total lung volume. Figure P1.94 shows the results of measuring the total lung volume and average alveolar volume of six individuals. From these data, what can you infe...

Q: The velocity of blood in the aorta can be measured directly with

The velocity of blood in the aorta can be measured directly with ultrasound techniques. A typical graph of blood velocity versus time during a single heartbeat is shown in Fig. P2.92. Which statement...

Q: A rocket is fired at an angle from the top of a

A rocket is fired at an angle from the top of a tower of height h0 = 50.0 m. Because of the design of the engines, its position coordinates are of the form x1t2= A + Bt2 and y(t) = C + Dt3, where A, B...

Q: A faulty model rocket moves in the xy-plane (the

A faulty model rocket moves in the xy-plane (the positive y-direction is vertically upward). The rocket’s acceleration has components ax(t)= at2 and ay(t)= b - gt, where a = 2.50 m/s4, b = 9.00 m/s2,...

Q: If r = bt2

If r = bt2

Q: The position of a dragonfly that is flying parallel to the ground

The position of a dragonfly that is flying parallel to the ground is given as a function of time by r = [2.90 m +(0.0900 m/s2)t2]

Q: A test rocket starting from rest at point A is launched by

A test rocket starting from rest at point A is launched by accelerating it along a 200.0-m incline at 1.90 m/s2 (Fig. P3.43). The incline rises at 35.0° above the horizontal, and at the ins...