PHYSICS LAB FINAL EXAM 2026 GRADED A+
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? - CORRECT 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. -
CORRECT 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
pg. 1
,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. - CORRECT ANSWER = 51.7
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). - CORRECT 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. - CORRECT ANSWER = .07%
percent difference=(300000000-299792458)*100/(300000000)=0.07
percent
pg. 2
, LAB 2 WEEK PRELAB " Which of the following instruments will you be
using to make measurements this week in lab? - CORRECT 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? - CORRECT 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? - CORRECT ANSWER = Infinite digits of
precision and infinite significant digits
What is the least-count of the ruler?
Answer
0.1 - CORRECT ANSWER = (b) From the picture, what is the measured
value?
Answer
pg. 3
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? - CORRECT 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. -
CORRECT 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
pg. 1
,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. - CORRECT ANSWER = 51.7
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). - CORRECT 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. - CORRECT ANSWER = .07%
percent difference=(300000000-299792458)*100/(300000000)=0.07
percent
pg. 2
, LAB 2 WEEK PRELAB " Which of the following instruments will you be
using to make measurements this week in lab? - CORRECT 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? - CORRECT 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? - CORRECT ANSWER = Infinite digits of
precision and infinite significant digits
What is the least-count of the ruler?
Answer
0.1 - CORRECT ANSWER = (b) From the picture, what is the measured
value?
Answer
pg. 3
