PHYSICS 165 FINAL REVIEW EXAM QUESTIONS AND
ANSWERS
/.Which statement best describes the scientific method - Answer-✅a systematic
process used to find a solution to a problem
/.The ability to produce change is known as - Answer-✅Energy
/.A physical quantity that remains constant during an experiment is known as a -
Answer-✅Control
/.Where an increase in the independent variable causes the dependent variable to
increase - Answer-✅Direct proportion
/.Which of the following best describes a model - Answer-✅A simple representation of a
complex concept of nature
/.Which of the following is a measurement of time - Answer-✅The second
/.Which of the following is a measurement of the amount of a substance - Answer-✅The
mole
/.Which of the refers to the agreement of several measurements among each other -
Answer-✅Precise
/.How many significant figures are in 75,021,000 m - Answer-✅5
/.How many significant figures are in 0.00301 m - Answer-✅3
/.How many significant figures are in 2.030x10^4 kg - Answer-✅4
/.Classical physics is an excellent approximation as long as three things are true. Which
of the following statements is one of those three things? - Answer-✅The objects dealt
with must be large enough to be seen one of the microscope
,/.Besides factors that are unique to the situation, the factors contributing to uncertainty
in a measurement include: - Answer-✅Limitations of the measuring device and the skill
of the person making the measurement.
/.The mass of a block of wood is reported as 458 +- 21 g. What is the percent
uncertainty? - Answer-✅(21g/458) × 100= 4.58 = 4.6%
/.The time for a drag race is 17.5 s ‡ 8.1%. What is the absolute uncertainty? - Answer-
✅17.5 s X 8.1% = 1.4175 → 1.4 s
/.Covert 50 km to meters. - Answer-✅50km x(1m/1000km) = 0.05m
/.Covert 7200 mg to grams. - Answer-✅7200mg x (1g/1000mg)= 7.2g
/.A person runs a race in 2712 s. How many minutes is this time? - Answer-✅2712s x
(1min/60s)= 45.20minutes
/.What do you get when you divide 42.0 m by 15.0 s? - Answer-✅42.0m/ 15.0s= 2.8
2.80 m/s
/.In a meaningful paragraph or two, describe the role of experimentation in science. Be
sure to describe how experimental data can affect our knowledge of the universe and
how the reliability of information is affected by the presence or lack of experimental
data. - Answer-✅Experimentation in sicence is important because it helps us learn
about how things work in the world.
By running experiments, scientist can collect evidence that shows weather their ideas
are correct or need to be changed. this evidence helps us understand the universe
better and makes our ideas more reliable. When their is a good experimental data, we
can trust the information more because it is based on real observations. If there was no
experimental data taking place then the ideas would just be guesses and could possibly
not be true. So experiments help us find the truth behind things and make scientific
knowledge stronger and more trustworthy.
/.In an experiment, the factors that affect the period of oscillation of a mass bouncing on
a spring are being tested. During one set of trials, the mass of the object attached to the
spring is systematically increased, and the resulting period of the system is measured.
The entire time the same spring is used.
Identify the independent variable, the dependent variable, and the controlled variable. -
Answer-✅independent variable: mass of the object attached to the spring dependent
variable: period of the system
controlled variable: the spring used during the experiment
/.You sit down at your desk to start your homework online and attempt to turn on your
computer. Unfortunately, it will not turn on. Despite being enraged, you decide to calm
down and to use the 6 steps of the scientific method by Karl Pearson to find out why
, your computer will not turn on. Describe the steps of the scientific method and what
specifc actions would you take during each step of the scientific method. - Answer-✅1.
find the problem
computer will not turn on
2. Gather data
look around the room and desk to see what could have happened (I see a sippy cup of
water spilled on the floor with the lid missing)
3. form a hypothesis
I believe that my little brother spilled his cup of water on my computer
4. expand Hypothesis
i believe that when my brother was in my room watching youtube on my computer he
spilled his water on my computer
5. Test Hypothesis
I tested my hypothesis by looking through the house. I see my older brother eating at
the table, my dog napping and I see my brother on the couch crying with a wet shirt.
6. Evaluate Hypothesis
My hypothesis was correct my brothers shirt was wet from when he spilled his cup on
my computer while he was watching youtube and he was crying because he was scared
to tell me.
/.Exam 2 - Answer-✅
/.Which of the following of the best definition of reference frame - Answer-✅A collection
of objects that are considered to be stationary that is used to describe the motion of
objects
/.A physical quantity that has only magnitude is known as a - Answer-✅Scalar
/.Classify displacement as a vector quantity for a scalar quantity - Answer-✅Vector
/.The rate of change in velocity is known as _____ it is usually measured in meters per
second squared (m/s2) - Answer-✅Acceleration
/.Hey, Rob, dropped off of a cliff is in freefall during its motion to the bottom of the cliff
which of the following statements is true about the rocks motion - Answer-✅The speed
of the rock increases as it falls, the celebration of the rock is constant as it falls, gravity
is the only force acting on the rock
/.A ball is to vertically upward with the speed of 10.0 M/S which of the following is true
about the balls of motion at the peak of its path - Answer-✅The ball has zero speed
/.A ball is tall vertically upwards with a speed of 20.0 M/S when it is called at the same
height which it was thrown it will have a downward speed of about - Answer-✅20.0 M/S
ANSWERS
/.Which statement best describes the scientific method - Answer-✅a systematic
process used to find a solution to a problem
/.The ability to produce change is known as - Answer-✅Energy
/.A physical quantity that remains constant during an experiment is known as a -
Answer-✅Control
/.Where an increase in the independent variable causes the dependent variable to
increase - Answer-✅Direct proportion
/.Which of the following best describes a model - Answer-✅A simple representation of a
complex concept of nature
/.Which of the following is a measurement of time - Answer-✅The second
/.Which of the following is a measurement of the amount of a substance - Answer-✅The
mole
/.Which of the refers to the agreement of several measurements among each other -
Answer-✅Precise
/.How many significant figures are in 75,021,000 m - Answer-✅5
/.How many significant figures are in 0.00301 m - Answer-✅3
/.How many significant figures are in 2.030x10^4 kg - Answer-✅4
/.Classical physics is an excellent approximation as long as three things are true. Which
of the following statements is one of those three things? - Answer-✅The objects dealt
with must be large enough to be seen one of the microscope
,/.Besides factors that are unique to the situation, the factors contributing to uncertainty
in a measurement include: - Answer-✅Limitations of the measuring device and the skill
of the person making the measurement.
/.The mass of a block of wood is reported as 458 +- 21 g. What is the percent
uncertainty? - Answer-✅(21g/458) × 100= 4.58 = 4.6%
/.The time for a drag race is 17.5 s ‡ 8.1%. What is the absolute uncertainty? - Answer-
✅17.5 s X 8.1% = 1.4175 → 1.4 s
/.Covert 50 km to meters. - Answer-✅50km x(1m/1000km) = 0.05m
/.Covert 7200 mg to grams. - Answer-✅7200mg x (1g/1000mg)= 7.2g
/.A person runs a race in 2712 s. How many minutes is this time? - Answer-✅2712s x
(1min/60s)= 45.20minutes
/.What do you get when you divide 42.0 m by 15.0 s? - Answer-✅42.0m/ 15.0s= 2.8
2.80 m/s
/.In a meaningful paragraph or two, describe the role of experimentation in science. Be
sure to describe how experimental data can affect our knowledge of the universe and
how the reliability of information is affected by the presence or lack of experimental
data. - Answer-✅Experimentation in sicence is important because it helps us learn
about how things work in the world.
By running experiments, scientist can collect evidence that shows weather their ideas
are correct or need to be changed. this evidence helps us understand the universe
better and makes our ideas more reliable. When their is a good experimental data, we
can trust the information more because it is based on real observations. If there was no
experimental data taking place then the ideas would just be guesses and could possibly
not be true. So experiments help us find the truth behind things and make scientific
knowledge stronger and more trustworthy.
/.In an experiment, the factors that affect the period of oscillation of a mass bouncing on
a spring are being tested. During one set of trials, the mass of the object attached to the
spring is systematically increased, and the resulting period of the system is measured.
The entire time the same spring is used.
Identify the independent variable, the dependent variable, and the controlled variable. -
Answer-✅independent variable: mass of the object attached to the spring dependent
variable: period of the system
controlled variable: the spring used during the experiment
/.You sit down at your desk to start your homework online and attempt to turn on your
computer. Unfortunately, it will not turn on. Despite being enraged, you decide to calm
down and to use the 6 steps of the scientific method by Karl Pearson to find out why
, your computer will not turn on. Describe the steps of the scientific method and what
specifc actions would you take during each step of the scientific method. - Answer-✅1.
find the problem
computer will not turn on
2. Gather data
look around the room and desk to see what could have happened (I see a sippy cup of
water spilled on the floor with the lid missing)
3. form a hypothesis
I believe that my little brother spilled his cup of water on my computer
4. expand Hypothesis
i believe that when my brother was in my room watching youtube on my computer he
spilled his water on my computer
5. Test Hypothesis
I tested my hypothesis by looking through the house. I see my older brother eating at
the table, my dog napping and I see my brother on the couch crying with a wet shirt.
6. Evaluate Hypothesis
My hypothesis was correct my brothers shirt was wet from when he spilled his cup on
my computer while he was watching youtube and he was crying because he was scared
to tell me.
/.Exam 2 - Answer-✅
/.Which of the following of the best definition of reference frame - Answer-✅A collection
of objects that are considered to be stationary that is used to describe the motion of
objects
/.A physical quantity that has only magnitude is known as a - Answer-✅Scalar
/.Classify displacement as a vector quantity for a scalar quantity - Answer-✅Vector
/.The rate of change in velocity is known as _____ it is usually measured in meters per
second squared (m/s2) - Answer-✅Acceleration
/.Hey, Rob, dropped off of a cliff is in freefall during its motion to the bottom of the cliff
which of the following statements is true about the rocks motion - Answer-✅The speed
of the rock increases as it falls, the celebration of the rock is constant as it falls, gravity
is the only force acting on the rock
/.A ball is to vertically upward with the speed of 10.0 M/S which of the following is true
about the balls of motion at the peak of its path - Answer-✅The ball has zero speed
/.A ball is tall vertically upwards with a speed of 20.0 M/S when it is called at the same
height which it was thrown it will have a downward speed of about - Answer-✅20.0 M/S
