what is stored energy and the energy of position called? potential energy
TRANSCRIPT
Why does the bi-metal bar curve when heat is
applied to it?
Different metals expand at different rates
Give an example of an object going from
potential energy to kinetic energy
A book falling off a shelf
Someone turns on a switch to turn on a fan =
100 joules of electrical energy in 70 joules of motion energy out
20 joules of heat energy out 10 joules of sound energy out
How much of the energy is wasted?(not used for its intended purpose)
30 joules = heat + sound
Elastic forces in which a force is applied can be described as what type of energy – be specific
Stored mechanical - potential
Describe the amount of potential and kinetic
energy of a roller coaster at the top right before
going downPotential – mucho Kinetic - little
One egg is dropped from a 3 story building and another
egg is dropped from a 1 story building, which has the most gravitational potential
energy?
3rd story building
Apple battery lab: Pushing the same kind of
metal deeper into the apple resulted in this?
No electrical current.
Apple battery lab: Pushing different kinds of
metals deeper into the apple resulted in this?
More electrical current.
Apple battery lab: Pushing different kinds of
metals deeper into the apple resulted in this?
More electrical current.
What happened when two different metals touched in the apple
batteryElectrons jump from metal to metal
taking the path of least resistance
Why is there an energy benefit to some dark
colored animals?Dark colors absorb thermal energy and can keep them
warm in cold weather
State the Law of Conservation of EnergyEnergy cannot be created or
destroyed. It can only be converted from one form to another
Give an example of an energy conversion from our labs that goes from
chemical energy to thermal energy
Calcium chloride & water
I am the name given to the process in which light energy is used to make a
new substance with chemical energyPhotosynthesis
Give three different energy examples in which electrical
energy can be produced.
Motion (windmills)Radiant (solar panel)
Chemical (battery)
Paul Konerko hits one out of the park. Describe the energy
conversions that take place starting from the sun/nuclear
Sun / nuclear Chemical (him / from plants) motion (swinging bat) thermal & sound (collision – hitting the ball) motion (ball going out of park) thermal (friction in the air)