Misc 1
What is an example of elastic potential energy?
Stretching a rubber band, compressing a spring, bending a fresh stick, etc.
What is the energy transformation of a falling object?
What is a way electrical energy can transform?
Into lights in lightbulbs, into heat in stoves, into mechanical energy in washing machines.
Yes?
Yes?
What is an example of Gravitational Potential Energy?
Describe the energy of a projectile.
Teacher approval.
How could chemical potential energy be transferred?
A plant could take in radiant energy from the sun, convert it into chemical potential energy, and then an organism might eat the plant transferring that chemical potential energy.
What is energy from food often measured in?
Calories
What is an example of Chemical Potential Energy?
Unburned gasoline, fats in our body, food
When your leaders talk about conserving resources, what are they talking about?
Conserving fossil fuels
What is the formula for power?
Power = Energy/ Time
What is one calorie of food equal to?
4,000 Joules of Energy
Look at Mr. Breitenfeld's drawing on the board, label the three boxes.
Kinetic energy, potential energy, kinetic & potential energy
Describe the energy of a swingset.
Teacher approval.
What are the correct labels for a power calculation?
Power = Watts
Energy = Joules
Time = seconds.
How much energy is in one gram of fat in food?
10C or 40,000 Joules
When riding a roller coaster, eventually you will come to a complete stop, why?
Your kinetic energy will turn into friction and slow you down.
What kind of energy transformation occurs when you you have friction?
Kinetic energy is turned into thermal energy.
You transform 950J of chemical energy into mechanical energy to push a sofa. If it took you 5.0s to move the sofa, what was your power?
950Joules / 5.0s = 190 Watts
If a runner’s power is 400W as she runs, how much chemical energy does she convert into other forms in 10.0 seconds?
400Watts = (x)/(10s)
400 x 10
4,000 Joules