Physics Laboratory Manual (4th Edition) –
Complete Solutions Manual by David H. Loyd
PDF
How mant significant digits are in the number 0.00001980? - answer-4
2 graduate students measure the strength of an MRI's magnetic field to have the following
value:
Student A: 4.2 +- .8 T
Student B: 5.6 +- .5 T
Do the 2 students agree for the strength of the magnetic field? - answer-No
If I want to compare values before and after an event, I would use... - answer-Percent Change
If I want to compare two separate values, I would use: - answer-Percent Difference
If I want to compare predicted results to my measured results, I would use: - answer-Percent
Error
Does setting up a best fit line mean "connecting the dots"? - answer-No
Suppose we want to linearize by substitution the formula for dependent variable Kinetic Energy
(K) with independent variable velocity (v).
1
,If the original equation is
K=(1/2)m v^2, what will our "new" independent variable (x) be when we "map" this onto
y = mx + b? - answer-v^2
The known area of a table is 1.50 m2. You measure the length of the table to be 1.30 m and the
width to be 1.18 m. What is the percent error between the known area of the table and the
measured area of the table you calculate using A = L*W? - answer-2.27
Momentum is defined as mass times velocity. You find the mass of a car to be 2014.88 kg and
the velocity of the car to be 7.85 m/s, giving you a momentum of 15816.808 kg-m/s.
Round this momentum to the correct number of significant digits. - answer-15800
answer will be given in least significant figures
velocity has 2 significant figure only
so momentum=14000 kgm/s instead of 14334.612 kg-m/s.
One example of tolerance "that matters in the real world" can be found in radiation oncology
clinics. Physicians will prescribe some dose of radiation to a patient's tumor that must be
delivered within a certain tolerance (or range of doses) in order to control the tumor.
If a physician prescribes 50.7 Gy +/-2.00%, what is the maximum dose the patient can receive
(in Gy)?
Note: A Gy is measure of the amount of energy deposited per unit mass. - answer-51.7
2
, 55.5*.02=1.11 55.5+1.11=56.61
Humans life an average of 84.6 years in Japan. Express this time in units of days if the
conversion factor is exactly 365.25 days.
Round your answer to the correct number of significant digits as given by the original time in
years (because the conversion factor is known *exactly,* meaning to infinite precision). -
answer-30900
The speed of light is 299,792,458 m/s. However, most physicists round this number to 3x108
m/s. What is the percent difference in these values using the correct number of significant
digits? Assume the exact speed of light is the reference value. - answer-.07%
percent difference=(300000000-299792458)*100/(300000000)=0.07 percent
LAB 2 WEEK PRELAB " Which of the following instruments will you be using to make
measurements this week in lab? - answer-(Select all that apply.)
Select one or more:
a. digital caliper Correct
b. meter stick Correct
c. triple beam balance Correct
In MKS units, final answers of time should always be given in which of the following units? -
answer-s
In this lab (and others) we will be doing calculations with the gravitational constant g = 9.8
m/s2. Because we will treat it as a mathematical constant assumed to be known exactly, how
many significant digits does it contain? - answer-Infinite digits of precision and infinite
3
Complete Solutions Manual by David H. Loyd
How mant significant digits are in the number 0.00001980? - answer-4
2 graduate students measure the strength of an MRI's magnetic field to have the following
value:
Student A: 4.2 +- .8 T
Student B: 5.6 +- .5 T
Do the 2 students agree for the strength of the magnetic field? - answer-No
If I want to compare values before and after an event, I would use... - answer-Percent Change
If I want to compare two separate values, I would use: - answer-Percent Difference
If I want to compare predicted results to my measured results, I would use: - answer-Percent
Error
Does setting up a best fit line mean "connecting the dots"? - answer-No
Suppose we want to linearize by substitution the formula for dependent variable Kinetic Energy
(K) with independent variable velocity (v).
1
,If the original equation is
K=(1/2)m v^2, what will our "new" independent variable (x) be when we "map" this onto
y = mx + b? - answer-v^2
The known area of a table is 1.50 m2. You measure the length of the table to be 1.30 m and the
width to be 1.18 m. What is the percent error between the known area of the table and the
measured area of the table you calculate using A = L*W? - answer-2.27
Momentum is defined as mass times velocity. You find the mass of a car to be 2014.88 kg and
the velocity of the car to be 7.85 m/s, giving you a momentum of 15816.808 kg-m/s.
Round this momentum to the correct number of significant digits. - answer-15800
answer will be given in least significant figures
velocity has 2 significant figure only
so momentum=14000 kgm/s instead of 14334.612 kg-m/s.
One example of tolerance "that matters in the real world" can be found in radiation oncology
clinics. Physicians will prescribe some dose of radiation to a patient's tumor that must be
delivered within a certain tolerance (or range of doses) in order to control the tumor.
If a physician prescribes 50.7 Gy +/-2.00%, what is the maximum dose the patient can receive
(in Gy)?
Note: A Gy is measure of the amount of energy deposited per unit mass. - answer-51.7
2
, 55.5*.02=1.11 55.5+1.11=56.61
Humans life an average of 84.6 years in Japan. Express this time in units of days if the
conversion factor is exactly 365.25 days.
Round your answer to the correct number of significant digits as given by the original time in
years (because the conversion factor is known *exactly,* meaning to infinite precision). -
answer-30900
The speed of light is 299,792,458 m/s. However, most physicists round this number to 3x108
m/s. What is the percent difference in these values using the correct number of significant
digits? Assume the exact speed of light is the reference value. - answer-.07%
percent difference=(300000000-299792458)*100/(300000000)=0.07 percent
LAB 2 WEEK PRELAB " Which of the following instruments will you be using to make
measurements this week in lab? - answer-(Select all that apply.)
Select one or more:
a. digital caliper Correct
b. meter stick Correct
c. triple beam balance Correct
In MKS units, final answers of time should always be given in which of the following units? -
answer-s
In this lab (and others) we will be doing calculations with the gravitational constant g = 9.8
m/s2. Because we will treat it as a mathematical constant assumed to be known exactly, how
many significant digits does it contain? - answer-Infinite digits of precision and infinite
3
