Exam (elaborations)
PHY 111 Midterm Exam Questions With Complete Solutions
- Course
- PHY 111
- Institution
- Rio Salado Community College
PHY 111 Midterm Exam Questions With Complete Solutions
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PHY 111 Midterm Exam Questions With CompleteSolutions
an example of a unit in the English or metric system which is a
mass unit Correct Answers English- slug
Metiric- kilogram
are metric units more accurate than English units? Why is the
metric system more preferred over the English system? Correct
Answers the metric system is viewed as being easier than
English units, but not more accurate
Can an object with a constant velocity be accelerating? Correct
Answers No because constant velocity means your speed is not
changing
Can an object with constant speed be accelerating? Correct
Answers Yes because acceleration is the time rate of change of
velocity
Describe Newtons three laws of motion Correct Answers 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
Give an example of the unit which describes a weight Correct
Answers English- pound
Metric- newton
, How are the stars distributed in the universe? Correct Answers
An entire set of stars that are held together by gravity is a galaxy
How did Aristotle's concept of celestial motion differ from that
of Copernicus and Kepler? Correct Answers Aristotle believed
that earth was at the center of the universe and move in a
circular motion
Copernicus and Kepler believe that the sun was the Center of the
universe and that the motions were epicycles
How did the theories of Copernicus and Kepler differ? Tycho
Brache? Correct Answers Copernicus believe planets move in a
circular motion
Kepler and Brahe believed in epicycles
How do you comets move? Correct Answers Around the sun in
elliptical orbit; follow Kepler's laws the closer they are to the
sun the faster they move
How does an increase in the mass of one or both masses
influence the force between the two masses? Correct Answers
If the mass of one object is doubled the force of gravity between
the two objects is also doubled
How does the concept of mass differ from the concept of
weight? Correct Answers 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? Correct Answers The object will float if it's
density is greater than the density of the liquid it is put in
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