gr 10- physics (unit 3.1) Flashcards
what are the key concepts of the properties of energy?
- Energy can produce change in a system.
- There are different forms of energy.
- Energy can be transferred or transformed.
- Physical quantities contribute to different forms of energy.
What’s a perpetual motion machine?
a machine that runs forever
how can energy present itself?
the air, walking, a conversation, etc…
can energy be directly seen?
no
equation to find the velocity
distance/ time
equation to find average speed/velocity
distance final- distance initial/ time final- time inital
equation to find distance
velocity. time
kinetic energy
is the energy of motion. Anything that is moving has kinetic energy.
potential energy
is the stored energy an object has as a result of its
condition or position.
mechanical kinetic energy
Any object that is moving has mechanical kinetic energy, from the smallest bacteria to
the largest galaxies.
radiant kinetic energy
-Radiant energy is the energy of electromagnetic waves that travel or “radiate” from an
energy source.
-For example, light bulbs radiate ultraviolet radiation, visible light, and infrared radiation, which are transformed into thermal energy when they are absorbed by
matter.
sound energy
sound
electrical kinetic energy
this is the energy of electrons moving along a wire or other conductor
electrical kinetic energy
this is the energy of electrons moving along a wire or other conductor
chemical potential energy
- This energy is stored in chemical bonds
- Some animals, like a firefly can transform chemical potential energy to produce light.
elastic potential energy
-This energy is stored in a stretched or compressed object.
-Elastic potential energy does not just apply to an elastic band or a spring.
-It applies to any object, like the soles of your shoes when you walk, or the tennis ball
and racquet.
gravitational potential energy
when something is about to fall or drop
nuclear energy
-This energy is stored within the nucleus
of an atom
-Nuclear processes can release an
an enormous amount of energy
magnetic potential energy
-A compass needle moves because it’s magnetic and is
attracted by Earth’s magnetic field.
-If you prevent the needle from moving, it has
magnetic potential energy, as it now has the potential
to move.
types of systems (open, closed, and isolated)
- An open system can exchange both energy and matter with its surroundings
- A closed system can exchange energy, but not matter, with its surroundings
- An isolated system cannot exchange energy or matter with its surroundings
whats non-useful energy describes as?
lost energy
example of an open, closed and isolated system
opened system: an uncovered pot of boiling potatoes
closed system: a boiling pot with a closed lid
isolated system: a pot of potatoes closed In a container (in theory it would still have some change of energy because its hard to completely isolate a system but it was still reduced a lot)
