An adult human at rest inhales and exhales approximately 500 mL of air (called the tidal volume) in approximately 5 sec . However, at the end of each exhalation, the lungs still contain a volume of air, called the functional residual capacity (FRC), which is approximately 2000 mL . (See Example 6) a. What volume of air is in the lungs after inhalation? b. What volume of air is in the lungs after exhalation? c. What is the period of a complete respiratory cycle? d. Write a function V t = A c o s B t + D to represent the volume of air in the lungs t seconds after the end of an inhalation. e. What is the average amount of air in the lungs during one breathing cycle? f. During hyperventilation, breathing is more rapid with deep inhalations and exhalations. What parts of the equation from part (d) change?
An adult human at rest inhales and exhales approximately 500 mL of air (called the tidal volume) in approximately 5 sec . However, at the end of each exhalation, the lungs still contain a volume of air, called the functional residual capacity (FRC), which is approximately 2000 mL . (See Example 6) a. What volume of air is in the lungs after inhalation? b. What volume of air is in the lungs after exhalation? c. What is the period of a complete respiratory cycle? d. Write a function V t = A c o s B t + D to represent the volume of air in the lungs t seconds after the end of an inhalation. e. What is the average amount of air in the lungs during one breathing cycle? f. During hyperventilation, breathing is more rapid with deep inhalations and exhalations. What parts of the equation from part (d) change?
An adult human at rest inhales and exhales approximately
500
mL
of air (called the tidal volume) in approximately
5
sec
. However, at the end of each exhalation, the lungs still contain a volume of air, called the functional residual capacity (FRC), which is approximately
2000
mL
. (See Example 6)
a. What volume of air is in the lungs after inhalation?
b. What volume of air is in the lungs after exhalation?
c. What is the period of a complete respiratory cycle?
d. Write a function
V
t
=
A
c
o
s
B
t
+
D
to represent the volume of air in the lungs
t
seconds after the end of an inhalation.
e. What is the average amount of air in the lungs during one breathing cycle?
f. During hyperventilation, breathing is more rapid with deep inhalations and exhalations. What parts of the equation from part (d) change?
1. Show that the vector field
F(x, y, z)
=
(2x sin ye³)ix² cos yj + (3xe³ +5)k
satisfies the necessary conditions for a conservative vector field, and find a potential function for
F.
1. Newton's Law of Gravitation (an example of an inverse square law) states that the magnitude
of the gravitational force between two objects with masses m and M is
|F|
mMG
|r|2
where r is the distance between the objects, and G is the gravitational constant. Assume that the
object with mass M is located at the origin in R³. Then, the gravitational force field acting on
the object at the point r = (x, y, z) is given by
F(x, y, z) =
mMG
r3
r.
mMG
mMG
Show that the scalar vector field f(x, y, z) =
=
is a potential function for
r
√√x² + y² .
Fi.e. show that F = Vf.
Remark: f is the negative of the physical potential energy, because F = -V(-ƒ).
2. Suppose f(x) = 3x² - 5x. Show all your work for the problems below.
A Problem Solving Approach To Mathematics For Elementary School Teachers (13th Edition)
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