Kinetic Energy
When kinetic energy increases, what also increases?
Thermal energy
What is work?
Transfer of energy from one object to another through the application of force
What is the law for energy conservation?
Energy cannot be created or destroyed, but transferred from one form to another
Thermal energy is measured by the amount of _______
kinetic energy
Friction converts mechanical energy into ____________
thermal energy
What is kinetic energy?
The energy of motion
What is potential energy?
Stored energy
Explain how a dryer works?
It converts electrical energy to mechanical energy and thermal energy
What kind of energy fuses or splits atoms to release immense levels of energy?
nuclear
Why is friction important for cars?
It helps cars steer
Does a 2 ton car, a 20lb bicycle, or a person walking have more kinetic energy if they are going the same speed?
The 2 ton car has more kinetic energy
- More weight * same speed= more force
What kind of energy requires a medium?
What kind of energy does a lightbulb use and what does it convert it to when on?
+100 for the byproduct
electrical is converted to radiant
Byproduct: thermal energy
When throwing a baseball up in the air, when is the potential energy the greatest?
at the top, before it comes back down
Can an object do work
yes
When dropping something from a cliff, when is the kinetic energy the highest?
Just before it hits the bottom
What is a medium?
substance that allows passage
Explain how a hydroelectric dam converts kinetic energy into electric energy.
It spins when the water hits the generator, the spinning generates usable electrical energy that is delivered to homes.
How do you use the energy in chemical bonds?
break the bonds
What is the goal of aerodynamics?
Designing things to reduce friction
Why does the ball stop at some point before coming back down when throwing it up?
Because there is no kinetic energy for a brief moment. It converted to potential energy.
What is an exothermic reaction?
a reaction that results in loss of heat as a byproduct
How does a combustion engine in a car work?
_________ energy > ___________ energy > ________ energy
chemical/thermal/mechanical
What chemical process in plants converts electromagnetic energy into stored chemical energy that is then converted to sugars and oxygen
photosynthesis
What does DNA stand for?
a) deoxyribose nucleic acid
b) double nanoacid
c) nucleic double amino acid
a) deoxyribose nucleic acid