Types of Energy
What type of energy is stored in food we eat?
Chemical Energy
Create an energy transfer diagram for a lightbulb being turned on
Electrical -> Thermal + Radiant
Give two examples of Non-renewable resources
Coal, Oil, Natural Gas
What is work in physics?
When a force is applied on an object who's displacement is changed.
What is one difference between magnets and electromagnets?
2. they can also be turned on and off while magnets always work
Name three types of potential energy
Chemical, Gravitational, Nuclear, Elastic
Create an energy transfer diagram for a battery turning a fan on
Chemical -> Electrical -> Mechanical + Sound
Give 3 examples of Renewable Energy resources
Solar, Wind, Hydroelectric, Geothermal, Tidal, Biomass, Wave
(W=Fd)
How much work has been done if you pushed on a box with 10N of force and it moved 20 meters across the floor?
W=?
F=10N
d=20m
W=10(20) = 200 Joules
Chemical potential energy has to go through a ________________ to release it's stored energy
Name four types of Kinetic Energy
Radiant, Thermal, Mechanical, Electrical, Sound
Create an energy transfer diagram for the fish in the fish tank using energy from their fish flakes to swim around
Chemical -> Mechanical
What's one advantage and disadvantage of using Non-renewable Energy resources
Advantages: more efficient, they always work, cheap, etc.
Disadvantages: hurt our environment, eventually will run out
(P=W/t)
How much power has been exerted if you did 100 Joules of work over 25 seconds?
P=?
W=100 Joules
t=25 seconds
P=100/25 = 4 Watts
insulator
Why is Thermal Energy a type of Kinetic Energy?
Because Thermal Energy (heat) is talking about how fast molecules are moving.
Create an energy transfer diagram for your car using gasoline to move.
Chemical -> thermal + radiant + sound -> mechanical
What's one advantage and disadvantage of using Renewable Energy resources
Disadvantages: not efficient, only works under specific conditions
What is the label for power and work?
watts and joules
What is the law of conservation of energy?
Energy is never created or destroyed, only transformed.
When heat is released during a chemical reaction, it is called exothermic.
Create an energy transfer diagram for someone that jumps off a ledge, hits a trampoline, and flies back onto the ledge
Gravitational -> mechanical -> elastic -> mechanical -> gravitational
How do Renewable Resources create electricity?
The renewable resource turns a turbine that generates electricity
(W=Fd)
(P=W/t)
How much force was exerted on a box if it took 100 watts of power over 2 seconds, and it ended with a displacement of 4 meters?
P=100, t=2, d=4
100=W/2 = 200
W=200
200=F(4) = 50
F=50N
Explain why windows that have a space between two panes of glass filled with air is a good insulator
We learned that less-dense materials are good insulators and gas is not dense at all.