AC HPAT Physics EXAM Questions AND Correct Answers
A force - ✔✔a force is any interaction that, when unopposed, will change the
motion of an object. A force can cause an object with mass to change its velocity
(which includes to begin moving from a state of rest), i.e., to accelerate. Force
can also be described intuitively as a push or a pull
Absolute Pressure - ✔✔· Absolute pressure is a pressure that is relative to the
zero pressure in the empty, air-free space of the universe. This reference
pressure is the ideal or absolute vacuum. It is denoted with the subscript "abs":
Pabs.
Acceleration - ✔✔· Acceleration is the rate of change of velocity with time.
Alternating current vs direct current - ✔✔· AC vs. DC (Alternating Current vs.
Direct current) The difference between AC and DC lies in the direction in which
the electrons flow. In DC, the electrons flow steadily in a single direction, or
"forward." In AC, electrons keep switching directions, sometimes going
"forward" and then going "backward."
Atmospheric pressure - ✔✔· Atmospheric pressure is a force in an area pushed
against a surface by the weight of the atmosphere of Earth, a layer of air. ... This
is because high places do not have as much air above them, pushing down.
Barometers can be used to measure atmospheric pressure. There is the same
atmospheric pressure from all directions.
Bernoulli's Principle - ✔✔· Bernoulli's principle is an idea of fluid dynamics. It
says that as speed of the fluid increases, pressure decreases. For a steady flow,
the amount of fluid entering the pipe must equal the amount leaving the pipe,
so the fluid speed in the thin part must increase.
, Boyles Law - ✔✔· Boyle's law is a gas law, stating that the pressure and volume
of a gas have an inverse relationship. If volume increases, then pressure
decreases and vice versa, when temperature is held constant.
Chemical Energy - ✔✔· Chemical energy is energy stored in the bonds of
chemical compounds, like atoms and molecules. This energy is released when a
chemical reaction takes place. Usually, once chemical energy has been released
from a substance, that substance is transformed into a completely new
substance.
Coefficient of friction - ✔✔· A coefficient of friction is a value that shows the
relationship between two objects and the normal reaction between the objects
that are involved. ... The coefficient of friction depends on the objects that are
causing friction. The value is usually between 0 and 1 but can be greater than 1.
Conventional current - ✔✔· assumes that current flows out of the positive
terminal, through the circuit and into the negative terminal of the source. ...
Electron Flow is what actually happens, and electrons flow out of the negative
terminal, through the circuit and into the positive terminal of the source
Density - ✔✔· Density is a measure of mass per volume. The average density of
an object equals its total mass divided by its total volume. An object made from
a comparatively dense material (such as iron) will have less volume than an
object of equal mass made from some less dense substance (such as water).
Displacement - ✔✔· Displacement is a vector quantity that refers to "how far
out of place an object is"; it is the object's overall change in position.
A force - ✔✔a force is any interaction that, when unopposed, will change the
motion of an object. A force can cause an object with mass to change its velocity
(which includes to begin moving from a state of rest), i.e., to accelerate. Force
can also be described intuitively as a push or a pull
Absolute Pressure - ✔✔· Absolute pressure is a pressure that is relative to the
zero pressure in the empty, air-free space of the universe. This reference
pressure is the ideal or absolute vacuum. It is denoted with the subscript "abs":
Pabs.
Acceleration - ✔✔· Acceleration is the rate of change of velocity with time.
Alternating current vs direct current - ✔✔· AC vs. DC (Alternating Current vs.
Direct current) The difference between AC and DC lies in the direction in which
the electrons flow. In DC, the electrons flow steadily in a single direction, or
"forward." In AC, electrons keep switching directions, sometimes going
"forward" and then going "backward."
Atmospheric pressure - ✔✔· Atmospheric pressure is a force in an area pushed
against a surface by the weight of the atmosphere of Earth, a layer of air. ... This
is because high places do not have as much air above them, pushing down.
Barometers can be used to measure atmospheric pressure. There is the same
atmospheric pressure from all directions.
Bernoulli's Principle - ✔✔· Bernoulli's principle is an idea of fluid dynamics. It
says that as speed of the fluid increases, pressure decreases. For a steady flow,
the amount of fluid entering the pipe must equal the amount leaving the pipe,
so the fluid speed in the thin part must increase.
, Boyles Law - ✔✔· Boyle's law is a gas law, stating that the pressure and volume
of a gas have an inverse relationship. If volume increases, then pressure
decreases and vice versa, when temperature is held constant.
Chemical Energy - ✔✔· Chemical energy is energy stored in the bonds of
chemical compounds, like atoms and molecules. This energy is released when a
chemical reaction takes place. Usually, once chemical energy has been released
from a substance, that substance is transformed into a completely new
substance.
Coefficient of friction - ✔✔· A coefficient of friction is a value that shows the
relationship between two objects and the normal reaction between the objects
that are involved. ... The coefficient of friction depends on the objects that are
causing friction. The value is usually between 0 and 1 but can be greater than 1.
Conventional current - ✔✔· assumes that current flows out of the positive
terminal, through the circuit and into the negative terminal of the source. ...
Electron Flow is what actually happens, and electrons flow out of the negative
terminal, through the circuit and into the positive terminal of the source
Density - ✔✔· Density is a measure of mass per volume. The average density of
an object equals its total mass divided by its total volume. An object made from
a comparatively dense material (such as iron) will have less volume than an
object of equal mass made from some less dense substance (such as water).
Displacement - ✔✔· Displacement is a vector quantity that refers to "how far
out of place an object is"; it is the object's overall change in position.
