PHYS 165 MODULE 10 EXAM QUESTIONS AND
ANSWERS 2026 CERTIFICATION STUDY PACK
◉ The revolutionary discoveries made starting at the beginning of
the 20th century led to a collection of physics principles called
Answer: Modern Physics
◉ Classical physics is an excellent approximation as long as three
things are true. What are those things? Answer: 1. Matter must be
moving at speeds less than about 1% of the speed of light.
2. The objects dealt with must be large enough to be seen with a
microscope.
3. Only weak gravitational fields, such as the field generated by the
Earth, can be involve
◉ Modern physics is comprised of two revolutionary theories. What
are they? Answer: relativity and quantum mechanics
◉ Under what condition must we use relativity? Answer: When the
speed of the object is above 1% of the speed of light.
◉ Quantum Mechanics deals with objects that are how big? Answer:
objects smaller than can be seen with a microscope
, ◉ A [blank] is a property of an object that can be measured Answer:
Physical quantity
◉ A [blank] is a definite value of a physical quantity. Answer: Unit or
Unit of measure
◉ The list below contains physical quantities and units. Identify
which ones are physical quantities and which ones are units.
Distance
Kilogram
Mass
Meter
Second
Time Answer: Distance - quantities
Kilograms - units
Mass- quantities
Meter- units
Second- unit
Time - quantities
◉ There are two kinds of units, what are they called? Answer:
fundamental and derived
ANSWERS 2026 CERTIFICATION STUDY PACK
◉ The revolutionary discoveries made starting at the beginning of
the 20th century led to a collection of physics principles called
Answer: Modern Physics
◉ Classical physics is an excellent approximation as long as three
things are true. What are those things? Answer: 1. Matter must be
moving at speeds less than about 1% of the speed of light.
2. The objects dealt with must be large enough to be seen with a
microscope.
3. Only weak gravitational fields, such as the field generated by the
Earth, can be involve
◉ Modern physics is comprised of two revolutionary theories. What
are they? Answer: relativity and quantum mechanics
◉ Under what condition must we use relativity? Answer: When the
speed of the object is above 1% of the speed of light.
◉ Quantum Mechanics deals with objects that are how big? Answer:
objects smaller than can be seen with a microscope
, ◉ A [blank] is a property of an object that can be measured Answer:
Physical quantity
◉ A [blank] is a definite value of a physical quantity. Answer: Unit or
Unit of measure
◉ The list below contains physical quantities and units. Identify
which ones are physical quantities and which ones are units.
Distance
Kilogram
Mass
Meter
Second
Time Answer: Distance - quantities
Kilograms - units
Mass- quantities
Meter- units
Second- unit
Time - quantities
◉ There are two kinds of units, what are they called? Answer:
fundamental and derived
