Energy Transformations 1
A ball is sitting at the top of a ramp - as the ball rolls down the ramp. What happens to the energy?
Kinetic energy increases and potential energy decreases
True or False; Energy can be created?
False
Ture or False; Energy cannot be destroyed.
True
True or False; Energy can change forms.
True
How does a microwave cook food?
Using radiation; electromagnetic waves
How is energy transferred when a cold spoon is placed in a hot cup of tea?
The heat energy of the tea is transferred to the spoon until they are equal temperatures.
What energy transformation takes place in a car?
chemical to thermal to electrical to light to sound to mechanical (in varying orders)
What energy transformation takes place from water stored behind a dam when the dam is opened?
potential to mechanical to kinetic
Putting ice cubes into warm tea causes what energy transformation to happen?
thermal energy from the tea is transferred to the ice cubes and causes them to melt
I asking why a color is the best color in the world a good scientific question? If so or if not, why?
No - because it is based on opinion, not empirical evidence
On a drive you come upon an accident and have to slam on the brakes - as the car skids to a stop, what does the kinetic energy transform into?
Thermal energy
How does rubbing your hands together on a cold day explain the Law of Conservation of Energy?
mechanical energy (rubbing hands together) transformed by friction to thermal energy (warming up hands)
What position on a skateboard ramp does the skateboarder have 50/50 kinetic and potential energy?
just prior to the bottom of the ramp
If you put a plate of hot food on the table where does the heat energy transfer to?
table top, air surrounding the plate
How does an air popper heat popcorn?
Convection heat
What energy conversions take place with a battery powered flashlight?
Chemical energy to electrical energy to thermal and light energies
What describes the energy transformations that occur in a toaster?
Electrical energy, mechanical energy, thermal energy, chemical energy, light energy
How does the Law of Conservation of Energy play a role in the powering of a wind turbine?
kinetic energy from the wind is converted to mechanical energy of the turbine which is then transferred to electrical energy form the generator which runs through the grid to homes and businesses
A popsicle has a definite shape when frozen; what happens to the popsicle after you've left it outside in the sun?
Conduction of heat
What type of energy is stored in liquid fuel?
Chemical energy
Can the energy of a ball bouncing get transferred to the surroundings and if so, how and if not, why?
Yes, energy gets converted into sound and thermal energy and is transferred to the surroundings as the bouncing ball eventually comes to a stop
putting a warm can in a cooler of ice will do what to the total amount of energy in the cooler?
the total amount of energy will stay the same; because the amount of energy of the can of soda lost is equal to the amount of energy that the ice gained.
If a balloon diameter increases 20 cm with every 10 degree increase and has a diameter of 80 cm at 30 degrees celsius; what will the diameter of the balloon be at 50 degrees celsius?
120 cm
State the Law of Conservation of Energy
Energy cannot be created or destroyed only transformed from one form to another