PHY 111 MIDTERM EXAM QUESTIONS
WITH ANSWERS 2025
what is the significance of labeling certain aspects of nature "Undefinable?" What are
three examples of this? - ANSWER-need answer
what are the differences among the terms:
1) Measurement Units
2) Measurement Standards
3) Measurement Instruments - ANSWER-1) Measurement Units are the units in which
you can measure something
2) Measurement Standards are the criteria that an object must meet to be measurable
3) Measurement Instruments are the tools used to measure something
are metric units more accurate than English units? Why is the metric system more
preferred over the English system? - ANSWER-the metric system is viewed as being
easier than English units, but not more accurate
summarize some of the steps through which distance measurement standards have
evolved though history - ANSWER-Egyptians used their bodies as measurements, a rod
is created as the model for a meter stick, meters are determined by laser marks on a
bar
what are the current standards for time and mass? - ANSWER-Time- atomic cesium
clock
Mass- platinum iridium cylinder
What three characteristics are most desirable in a measurement standard? - ANSWER-
Precision, accessibility, and if it is permanent
How long is a millimeter? - ANSWER-.001 meters- The thickness of a fingernail
How long is a centimeter? - ANSWER-.01 meters- The length of a pinky
How long is a meter - ANSWER-The length from hand to hand
what is a common object that has a mass of about 1 g? - ANSWER-A paperclip
What branch of the physical sciences emerged in response to a need to deal with the
concept of time and time measurement? - ANSWER-Astronomy
, an example of a unit in the English or metric system which is a mass unit - ANSWER-
English- slug
Metiric- kilogram
Give an example of the unit which describes a weight - ANSWER-English- pound
Metric- newton
How does the concept of mass differ from the concept of weight? - ANSWER-Mass is
called by gravitational pull
Weight is the effect made by gravity's influence
How does the density of an object relate to whether it floats or sinks in a liquid? -
ANSWER-The object will float if it's density is greater than the density of the liquid it is
put in
Is the density of steel the same on the moon as it is on earth? - ANSWER-any object
has the same density on the moon as it does on the earth, because gravity does not
affect the mass or volume of an object
Who first put numbers to his perceptions or experiences? - ANSWER-Pathagores
Who was the best ancient Greek philosopher scientist? - ANSWER-Aristotle
What are the differences among the terms:
SPEED, VELOCITY, ACCELERATION, CONSTANT VELOCITY, CONSTANT
ACCELERATION, CONSTANT SPEED WITH CHANGING VELOCITY - ANSWER-
SPEED- The distance of body moves in a period of time
VELOCITY- speed that is in a particular direction
ACCELERATION- any change in velocity over time
CONSTANT VELOCITY- velocity that doesn't change over time
CONSTANT ACCELERATION- I study increase or decrease in velocity
CONSTANT SPEED WITH CHANGING VELOCITY- The distance stays the same but
the direction changes
Describe Newtons three laws of motion - ANSWER-1) Law of inertia- and object at rest
stays at rest. An object in motion stays in motion, unless acted on by an external force
2) The amount of Force expelled onto the object determines the amount of acceleration
on the object
3) every action has an equal and opposite reaction
SPEED= Distance over Time - ANSWER-speed x Time equals distance traveled
In a freefall experiment using a glass marble and a ping-pong ball one my discover the
glass marble reaches the ground before the ping-pong ball, when both are dropped at
the same time in the same height what is the explanation? - ANSWER-They both hit the
ground at Approximately the same time because mass does not affect gravity
WITH ANSWERS 2025
what is the significance of labeling certain aspects of nature "Undefinable?" What are
three examples of this? - ANSWER-need answer
what are the differences among the terms:
1) Measurement Units
2) Measurement Standards
3) Measurement Instruments - ANSWER-1) Measurement Units are the units in which
you can measure something
2) Measurement Standards are the criteria that an object must meet to be measurable
3) Measurement Instruments are the tools used to measure something
are metric units more accurate than English units? Why is the metric system more
preferred over the English system? - ANSWER-the metric system is viewed as being
easier than English units, but not more accurate
summarize some of the steps through which distance measurement standards have
evolved though history - ANSWER-Egyptians used their bodies as measurements, a rod
is created as the model for a meter stick, meters are determined by laser marks on a
bar
what are the current standards for time and mass? - ANSWER-Time- atomic cesium
clock
Mass- platinum iridium cylinder
What three characteristics are most desirable in a measurement standard? - ANSWER-
Precision, accessibility, and if it is permanent
How long is a millimeter? - ANSWER-.001 meters- The thickness of a fingernail
How long is a centimeter? - ANSWER-.01 meters- The length of a pinky
How long is a meter - ANSWER-The length from hand to hand
what is a common object that has a mass of about 1 g? - ANSWER-A paperclip
What branch of the physical sciences emerged in response to a need to deal with the
concept of time and time measurement? - ANSWER-Astronomy
, an example of a unit in the English or metric system which is a mass unit - ANSWER-
English- slug
Metiric- kilogram
Give an example of the unit which describes a weight - ANSWER-English- pound
Metric- newton
How does the concept of mass differ from the concept of weight? - ANSWER-Mass is
called by gravitational pull
Weight is the effect made by gravity's influence
How does the density of an object relate to whether it floats or sinks in a liquid? -
ANSWER-The object will float if it's density is greater than the density of the liquid it is
put in
Is the density of steel the same on the moon as it is on earth? - ANSWER-any object
has the same density on the moon as it does on the earth, because gravity does not
affect the mass or volume of an object
Who first put numbers to his perceptions or experiences? - ANSWER-Pathagores
Who was the best ancient Greek philosopher scientist? - ANSWER-Aristotle
What are the differences among the terms:
SPEED, VELOCITY, ACCELERATION, CONSTANT VELOCITY, CONSTANT
ACCELERATION, CONSTANT SPEED WITH CHANGING VELOCITY - ANSWER-
SPEED- The distance of body moves in a period of time
VELOCITY- speed that is in a particular direction
ACCELERATION- any change in velocity over time
CONSTANT VELOCITY- velocity that doesn't change over time
CONSTANT ACCELERATION- I study increase or decrease in velocity
CONSTANT SPEED WITH CHANGING VELOCITY- The distance stays the same but
the direction changes
Describe Newtons three laws of motion - ANSWER-1) Law of inertia- and object at rest
stays at rest. An object in motion stays in motion, unless acted on by an external force
2) The amount of Force expelled onto the object determines the amount of acceleration
on the object
3) every action has an equal and opposite reaction
SPEED= Distance over Time - ANSWER-speed x Time equals distance traveled
In a freefall experiment using a glass marble and a ping-pong ball one my discover the
glass marble reaches the ground before the ping-pong ball, when both are dropped at
the same time in the same height what is the explanation? - ANSWER-They both hit the
ground at Approximately the same time because mass does not affect gravity
