PHYS 131- EXAM 1 QUIZ QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW
A student measures distance x to be 5 meters and area A to be 25 ft2.
Which of these statements is true?
A.[x2] = [A]
B.[5x] = A
C.x2 = [A]
D.x2 = A
E.None of these Ans✓✓✓ A
For a spherical alveolus of radius 100 μm, which is larger? Ans✓✓✓
Not sure
The diffusion constant D, describes how molecules jiggling around in a
fluid drift. It has dimensions[D] = L2/T
We have good reason to believe (we'll see it in a reading later) that D
depends on the average distance a molecules travels, λ, and it's average
speed v.
If [λ] = L and [v] = L/T guess an equation that expresses D in terms of λ
and v. Ans✓✓✓ D= λv
For a spherical alveolus of radius 10-4 m, which is larger? Ans✓✓✓ not
sure
, What is the best resolution to the alveolus paradox? Ans✓✓✓ Neither
surface area nor volume should be considered "bigger"; they should be
thought of as incomparable because they're different types of things.
QUIZ 1
For a spherical alveolus of radius 10-4 m, which is larger?
-They are equal
-Not Sure
-Volume
-Surface Area Ans✓✓✓ Not Sure
QUIZ 1
As part of an exam a few years ago, a student wrote the following
derivation of a final result. Without knowing the problem, but knowing
the dimensions of each quantity shown along the bottom state if equation
D is correct.
A.
B.
C.
D.
[M]=M [g]=L/T2 [h]=L [ω]=1/T [v]=L/T [R]=L [I]=ML2
True
False Ans✓✓✓ False
DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW
A student measures distance x to be 5 meters and area A to be 25 ft2.
Which of these statements is true?
A.[x2] = [A]
B.[5x] = A
C.x2 = [A]
D.x2 = A
E.None of these Ans✓✓✓ A
For a spherical alveolus of radius 100 μm, which is larger? Ans✓✓✓
Not sure
The diffusion constant D, describes how molecules jiggling around in a
fluid drift. It has dimensions[D] = L2/T
We have good reason to believe (we'll see it in a reading later) that D
depends on the average distance a molecules travels, λ, and it's average
speed v.
If [λ] = L and [v] = L/T guess an equation that expresses D in terms of λ
and v. Ans✓✓✓ D= λv
For a spherical alveolus of radius 10-4 m, which is larger? Ans✓✓✓ not
sure
, What is the best resolution to the alveolus paradox? Ans✓✓✓ Neither
surface area nor volume should be considered "bigger"; they should be
thought of as incomparable because they're different types of things.
QUIZ 1
For a spherical alveolus of radius 10-4 m, which is larger?
-They are equal
-Not Sure
-Volume
-Surface Area Ans✓✓✓ Not Sure
QUIZ 1
As part of an exam a few years ago, a student wrote the following
derivation of a final result. Without knowing the problem, but knowing
the dimensions of each quantity shown along the bottom state if equation
D is correct.
A.
B.
C.
D.
[M]=M [g]=L/T2 [h]=L [ω]=1/T [v]=L/T [R]=L [I]=ML2
True
False Ans✓✓✓ False
