Terms in this set (58)
matter and energy
physics is the study of....
the ideas of physics extend into more complex sciences
physics is the most basic science because...
an educated guess that has yet be proven by experiment
a hypothesis is...
A unit of measurement that is obtained by combining other units is a ______unit.
SI is based on units of ___
To measure volume, you use a
A type of graph that is useful for showing trends or continuous change is a
SI unit of time
SI unit of length
SI unit of mass
temperature of most laboratory thermometers
acceleration can be measured in
the most common frame of reference is...
Suppose you are in a car that is going around a curve. The speedometer reads a constant speed 30 miles per hour. Which of the following is NOT true?
a. You and your car are accelerating.
b. Your velocity is constant.
c. Your speed is constant
d. Your direction is constantly changing.
As an object falls free in a vacuum, its
about 10 m/s
If a freely falling object were somehow equipped with a speedometer, its speed would increase each second by
A distance-time graph is a straight line for
A train travels 6 meters in the first second of travel, 6 meters during the second second of travel, and 6 meters again during the third second. Its acceleration is
frame of reference
The object or point from which movement is determined is called
Compared to its weight on Earth, a 50-kg object on the moon will weigh
Compared to its mass on Earth, the mass of a 50-kg object on the moon will be
motion when a balanced force acts on an object
Newton's first law describes
Motion when an unbalanced force acts on an object is described by Newton's
force that can give a 1-kilogram mass an acceleration of 1 m/s/s
The Newton is defined as the
F = ma
The equation that correctly expresses Newton's second law is:
opposite and equal
Balanced forces are
the sum of the forces
When two forces act on an object in the same direction, the resultant force is equal to
the difference between the forces
When two forces act in opposite direction, the resultant force is equal to
leave motion unchanged
An unbalanced force cannot
equal and opposite
For every action, the reaction is
An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the amount of force of the bug on the car is:
action and reaction forces are applied to different objects
Even though every action force has an equal but opposite reaction force, they do not cancel one
another and motion may still occur because the:
"Forces occur in pairs" is another way of stating Newton's:
increasing the time of collision
Air bags reduce injury in automobile accidents by:
Work may be measured using units of:
increases by four times
As the speed of a moving object doubles, the amount of mechanical kinetic energy that it possesses:
A collision in which the colliding objects become distorted and/or generate heat during collision
a collision in which there is no net loss in kinetic energy
distance, displacement, speed, velocity, acceleration, force, mass, momentum, energy, work, and power
what are examples of vectors?
speed, volume, mass, temperature, power, energy, and time
what are examples of scalars?
The relationship between a spring's change in length and the force it exerts is called:
Opposite to an object's motion
Friction is the force that always acts
Both moving and nonmoving objects
The law of inertia applies to
A temperature of 150C is equivalent to:
one Fahrenheit degree
The smallest change of temperature is represented by:
Heat travels from sun to Earth by
the sum of all the kinetic energy of the atoms or molecules measure the object's
The average random kinetic energy of atoms or molecules within an object is a measure of the object's
The temperature at which molecules in a substance have the lowest amount of energy possible is :
At high altitudes, the boiling point of water
stays the same
When heat is added to boiling water, the temperature of the boiling water
about the same mass and opposite charge
Compared to protons, electrons have:
a result of adding one neutron, one proton, and one electron
A quanta is best described as:
Which type of radioactivity leaves the atomic number unchanged?
Which of subatomic particle has the highest mass?