Download potential energy?

T.E.D
Unit 5
Notes/EQ’s/Vocabulary
Lesson 1
Energy and Power
What is an alternating current?
Before even beginning to
transfer electricity over
long distances, it is
important to convert the
electricity to an alternating
current, which is an electric
current that reverses its
direction many times a
second at regular intervals,
typically used in power
supplies
In order to transfer electricity over long distances it most be first
converted in to which state:
In order to transfer electricity over long distances it
most be first converted in to which state:
A.
B.
C.
D.
Alternating current
Direct current
Varying current
Exponential current
What is petroleum?
Petroleum is a generic name
for hydrocarbons, including
crude oil, natural gas liquids,
natural gas and their products.
It can be classified as natural.
Petroleum can be classified as:
Petroleum can be classified as:
A.
B.
C.
D.
natural
synthetic
composite
man-made
How was human power replaced
during the industrial revolution?
• During the Industrial
Revolution, steam power
began to replace water
power and human power
as the primary source of
power in use in industry.
• Steam power was not
only used in engines but
also in locomotives,
furnaces and other
factory appliances that
were difficult to
implement prior to the
invention of steam power.
Rapid technological change occurred during the industrial revolution
because human power was replace by :
Rapid technological change occurred
during the industrial revolution because
human power was replace by :
A.
B.
C.
D.
nuclear power
steam power
solar power
electrical power
What is a heat sink?
A heat sink is a metal
conductor specially
designed to conduct
(and radiate) heat
A ribbed metal attachment that dispenses heat from a device is called a:
A ribbed metal attachment that dispenses heat from a device is called a:
A.
B.
C.
D.
transducer
heat sink
secondary cooling fan
air transmission system
What is potential energy?
Potential energy is the
energy possessed by a
body by virtue of its
position relative to
others, stresses within
itself, electric charge,
and other factors. An
object has potential
energy when it is sitting
still.
A slinky sitting still is an example of :
A slinky sitting still is an example of :
A.
B.
C.
D.
potential energy
kinetic energy
thermal energy
kinetic energy
What are non-renewable
resources?
Non-renewable
resources are natural
resources that can be
used up completely
or else used up to
such a degree that it
is economically
impractical to obtain
any more of them;
e.g., coal, nuclear
energy from uranium,
crude oil, and metal
ores.
Nuclear energy from uranium is a :
8.
Nuclear energy from uranium is a :
A.
B.
C.
D.
Non-renewable resource
renewable resource
fossil resource
sustainable resource
What is a series circuit?
A series circuit
is a circuit in
which current
has only one
path for
electrons to
follow.
Type of circuit that only has one path for electrons to flow:
Type of circuit that only has one path
for electrons to flow.
A.
B.
C.
D.
Series Circuit
Parallel Circuit
Open Circuit
Short Circuit
What are electrical insulators?
• An electrical insulator is a
material whose internal
electric charges do not flow
freely, and which therefore
does not conduct an electric
current, under the influence
of an electric field.
• A perfect insulator does not
exist, but some materials
such as glass, paper and
Teflon, which have high
resistivity, are very good
electrical insulators.
Materials like glass, dry wood, and rubber, are all examples of electrical:
Materials like glass, dry wood, and
rubber, are all examples of electrical:
A.
B.
C.
D.
insulators
semi-conductors
conductors
super-conductors
What is a DC circuit?
•Within electrical
engineering, a DC
circuit (Direct Current
circuit) is an electrical
circuit that consists of
any combination of
constant voltage
sources, constant
current sources, and
resistors.
•The flow of electrons
in a direct current
curuit travels from
negative to positive.
The flow of electron in a DC circuit travels from:
The flow of electron in a DC circuit
travels from:
A.
B.
C.
D.
negative to positive
positive to negative
positive to electron
negative to electron
How does a battery provide
electricity?
Batteries are a mix of
chemicals that cannot react
until a circuit is in place.
However, as soon as there is
a circuit in place they react
rapidly. This reaction
'produces' many spare
electrons that are no longer
needed by the chemicals,
these then flow freely round
the circuit (this is electricity
that is in the state of direct
current).
A battery provides electricity in the state of:
A battery provides electricity in the
state of:
A.
B.
C.
D.
Alternating current
Direct current
Varying current
Exponential current
What is a resistor?
A resistor is a
device having
resistance to the
passage of an
electric current, it
slows electron
flow.
Component in electronics that slows electron flow is :
Component in electronics that slows
electron flow is :
A.
B.
C.
D.
Resistor
Capacitor
Transistor
Battery
What is radiant heat?
Radiant heat
is heating a
building by
radiation from
panels containing
hot water or
electrical heaters
When the Lloyd family built their new home, they wanted a type of heating
system unconventional from traditional heating systems such as forced air.
They opted to install the heat supply beneath the floor. The effect is that the
warmth is felt throughout the room without the feeling of moving air. This type
of heat is called:
When the Lloyd family built their new home, they wanted a type of
heating system unconventional from traditional heating systems such
as forced air. They opted to install the heat supply beneath the floor.
The effect is that the warmth is felt throughout the room without the
feeling of moving air. This type of heat is called:
A.
B.
C.
D.
Electrical
Nuclear
Radiant
Thermal
How do you change potential
energy to kinetic energy?
• Potential energy
changes to kinetic
energy when an object
with potential energy
starts moving. Potential
energy decreases when
kinetic increases and
vice versa
Jesse is the star pitcher for his baseball team. His strategy is to hold on to the
ball, concentrate on the target, then release the ball in a powerful throw over
the batter's plate. This activity is a good example of changing :
Jesse is the star pitcher for his baseball team. His strategy is to
hold on to the ball, concentrate on the target, then release the
ball in a powerful throw over the batter's plate. This activity is a
good example of changing :
A.
B.
C.
D.
energy in motion to energy in movement
mechanical energy to potential energy
static energy to potential energy
potential energy to kinetic energy
What happens when the
mechanical advantage of a
machine is greater than 1?
When the mechanical
advantage of a
machine is greater than
one, effort required to
move mass decreases
and the distance the
mass moves with each
push also decreases.
If the mechanical advantage of a machine is greater than 1, the effort required to
move a mass ________ and the distance the mass moves with each push
_________.
If the mechanical advantage of a machine is greater than 1, the effort
required to move a mass ________ and the distance the mass moves
with each push _________.
A.
B.
C.
D.
increases, decreases
increases, increases
decreases, increases
decreases, decreases
What is the Law of the
Conservation of Energy?
• The Law of the
Conservation of
Energy states that
energy cannot be
created or
destroyed; it can
only be changed
from one form to
another.
Energy cannot be created or destroyed, it can be _____ from one form to
another.
Energy cannot be created or destroyed,
it can be _____ from one form to
another.
A.
B.
C.
D.
optimized
converted
synthesized
communicated
What is an unidirectional flow?
• An unidirectional flow
is an electric charge
that flows in a
constant direction
(Direct current, DC),
distinguishing it
from alternating
current (AC).
The unidirectional flow of electrical charge is known as:
The unidirectional flow of electrical
charge is known as:
A.
B.
C.
D.
Direct current
Alternating current
Varying current
Exponential current
What does LED stand for?
• LED stands for
light-emitting
diode, a
semiconductor
diode that glows
when a voltage is
applied
What does LED stand for?
What does LED stand for?
A.
B.
C.
D.
Light emitting diode
laser encoding device
Light encoding diode
Laser emitting diode
What is the mechanical advantage
ratio?
• The ratio of the force
produced by a
machine to the force
applied to it, used in
assessing the
performance of a
machine.
The ratio of the output force (load) produced by a working force applied
to the effort.
The ratio of the output force (load) produced by a
working force applied to the effort.
A.
B.
C.
D.
Mechanical Advantage
Efficiency
Work
Power
What is thermal energy?
• A heat-sourced
energy, measured in
Btu, that can be used
or transformed, into
electrical energy. It’s
not possible to build
an engine that
doesn’t exhaust
thermal energy.
It is not possible to build an engine that does not exhaust what type of
energy into the surrounding environment?
It is not possible to build an engine that does not
exhaust what type of energy into the surrounding
environment?
A.
B.
C.
D.
Radiant
Thermal
Mechanical
Nano
What is a strength to weight ratio?
• The strength to weight
ratio is a material's
strength (force per unit
area at failure) divided
by its density.
• Engineers use this ratio
for a number of things,
including to find the best
materials to use when
building structural
elements.
Aeronautical engineers prefer aluminum over steel for structural elements of
aircraft because aluminum has:
Aeronautical engineers prefer aluminum over steel for
structural elements of aircraft because aluminum has:
A.
B.
C.
D.
a higher strength to weight ratio
a higher ultimate strength
a higher strength to volume ratio
lower elastic and plastic limits
How are forms of energy found in
nature?
• Forms of energy
are found in various
places in nature.
One example could
be a from sitting on
a lily pad then
leaping into water.
This shows how it
moves from
potential energy to
kinetic energy.
A frog sitting on a lily pad then leaping into the water is an example of:
A frog sitting on a lily pad then leaping into the
water is an example of:
A.
B.
C.
D.
potential energy changing to kinetic energy
Kinetic energy changing to mechanical energy
Kinetic energy changing into potential energy
Mechanical energy changing into kinetic energy
What are problems regarding
nuclear energy?
• Issues with nuclear
energy include:
• Nuclear Waste
• Environmental
Degradation
• Accidents (such as
explosions)
The governor is struggling with conflicting advice on whether to begin an
evacuation that might affect more than 500,000 people. Engineers fear that the
reactor's fuel will melt out of its thick steel and cement encasement, or that a
hydrogen gas bubble in the core will explode. This scenario relates to a crisis
regarding which type of energy?
The governor is struggling with conflicting advice on whether to begin an
evacuation that might affect more than 500,000 people. Engineers fear
that the reactor's fuel will melt out of its thick steel and cement
encasement, or that a hydrogen gas bubble in the core will explode. This
scenario relates to a crisis regarding which type of energy?
A.
B.
C.
D.
nuclear energy
molecular energy
mechanical energy
hydroelectric energy
How is chemical energy stored?
• Energy cannot be
created or
destroyed, but it can
be saved in various
forms. One way to
store it is in the form
of chemical energy
in a battery. When
connected in a
circuit, a battery can
produce electricity.
The most common storage for chemical energy is:
The most common storage for chemical
energy is:
A.
B.
C.
D.
steel tubes
batteries
silos
wooden crates
What type of energy is found in a
lake behind a dam?
• Lakes found behind
dams are considered
to have
potential energy bec
ause it is still, in a
position to move.
When the dam
breaks it converts to
kinetic energy.
Lake Mead, the lake behind Hover dam, is an example of what type of energy?
Lake Mead, the lake behind Hover dam,
is an example of what type of energy?
A.
B.
C.
D.
Potential energy
Kinetic energy
Mechanical energy
Electrical energy
What is kinetic energy?
• Kinetic energy is
the energy
possessed by an
object because of
its motion, equal
to one half the
mass of the body
times the square
of its velocity
A slinky in motion is an example of:
A slinky in motion is an example of:
A.
B.
C.
D.
potential energy
kinetic energy
thermal energy
kinetic energy
How is electric power created?
• Electricity is most often
generated at a power
station by
electromechanical
generators, primarily driven
by heat engines fueled by
chemical combustion or
nuclear fission but also by
other means such as
the kinetic energy of flowing
water and wind. Fuel cells
consume hydrogen and
oxygen and only emit water
when creating electric
power.
Fuel cells consume hydrogen and oxygen and emit only water while creating
what type of power?
Fuel cells consume hydrogen and oxygen and emit
only water while creating what type of power?
A.
B.
C.
D.
Hydrogen
Steam
Hydrocarbon
Electric
How is an electrical current
produced?
• Current is the flow of
electrons through a
conducting substance. Each
electron carries an electric
charge - so as electrons
pass through a substance,
such as a metal to a
magnetic, then we say an
electric current (made up of
the electric charges that
each electron carries)
passes through that
substance.
An electrical current is produced by:
An electrical current is produced by:
A.
B.
C.
D.
Passing a coil of wire past a magnetic
Passing a coil of wire past a coil of wire
Passing a ceramic rod past magnetic
Passing a glass plate past a coiling wire