missing two activities
DESCRIPTION
Missing two activities. Post-Assessment 1: https://cnu.edu:8443/survey/entry.jsp?id=1171412917302. There is a link on the class web page. The password is nsci310 . It is case sensitive. - PowerPoint PPT PresentationTRANSCRIPT
Walking on Water
Butterfly Effect
Operation Oobleck
Fly Far! Habitat Hunters
Hovering Bubbles!
Missing two activities
Post-Assessment 1:https://cnu.edu:8443/survey/entry.jsp?id=1171412917302
There is a link on the class web page. The password is nsci310. It is case sensitive.
WISE TELS Activity (online part):If you can’t see the discussion or can only see your own principle, then go on to Activity 8 and complete it the best you can.
You may not be able to do the post-test. If it doesn’t appear after you complete Activity 8, don’t worry about it.
If you had a partner, you will both get the same grade.
The Rusty Nails: total mass of nails before, moist dish, open dish, dry completely, don’t let rust fall off, total mass of dry rusted nails after.
A. The mass of the dry, rusted nails will be more than the mass of the dry nails before they rusted.
B. The mass of the dry, rusted nails will be less than the mass of the dry nails before they rusted.
C. The mass of the dry, rusted nails will be the same as the mass of the dry nails before they rusted.
Material from which the exam will be drawn:
A. Text content readings.B. Handout content readings.C. Diagnoser assignments.D. Pre/Post-assessment.E. Classroom activities.F. Homework.G. Power Points from class.
The exam will have:
A. Short discussion questions.B. Multiple choice.C. Question (s) on a live
demonstration.D. Perhaps a performance part.
Classroom Activities:
A. Gravity On A RollB. Egg-tivityC. Level the LeverD. Puzzling PyramidsE. By Golly By Gum By TimeF. Gravitational and Potential Energy –
marble and cupG. ReactionsH. TELS: Heat and Temperature online at
WISE
Principles:
A. Newton’s LawsB. Simple machinesC. Energy ConservationD. Mass ConservationE. Thermal equilibriumF. Heat Flow
Formulas:
A. Net Force = Mass x AccelerationB. Mechanical Advantage = Load / EffortC. Gravitational Potential Energy is
proportional to HeightD. Kinetic Energy is proportional to the
square of the speedE. Stored spring energy is proportional to
the square of the stretch
Motion
is described by
has
Velocity
Change in position with time
andSpeed Direction
Acceleration
Change in velocity with time
andor
Change of speed
Change of direction
Position
Location in space
has
x
Simple Types of Motion
include
Uniform Velocity
Speed = constant Direction = constant Acceleration = 0 Velocity = position change divided by time
Constant Linear Acceleration
Acceleration = constant Motion along a line Constant change in speed Acceleration = velocity change divided by time
Position is fixed
Velocity = 0
Acceleration = 0
Velocity = slope of position vs. time curve
Acceleration = slope of velocity vs. time curve
in general
General Motion
can be shown by
Freely falling objects all accelerate at the same rate
freefall
All Motion
can be described using
Velocity = slope of position vs. time graph at point in time
Acceleration = slope of velocity vs. time graph at point in time
Plots or graphs
Slope is rise over run
rise
run
rise
run
rise
run
steeper slope shallower slope negative slope
Change in motion caused by net force
is described by
Newton’s Second Law
Net Force = mass times acceleration
Newton’s Third Law
Forces come in pairs
Body A Body B
Newton’s First Law
It takes a net force to change the motion
A on B
B on A
Simple Machines
is described by
The force of the effort can be smaller than the load. You can effectively multiply the effort.
The load can move farther than the effort. You can multiply the distance moved.
Mechanical Advantage = load divided by effort
Because energy must be conserved, you can’t do both with the same machine.
effort
load
Energy
is described by
In a closed system the total energy of all the forms stays constant. We say energy is conserved.
Energy can be transformed from one form into another. It can’t be created or destroyed
Energy has many forms. Examples are Gravitational Potential Energy and Kinetic Energy.
The Universe is the ultimate closed system. Small systems can be considered closed if you don’t let energy in or out.
Power is energy transferred, created
or consumed per time. It isn’t the
same thing.
Work in the simplest case is
force times distance. It is energy. Work can transfer energy
into or out of a system.
Matter
is described by
In a closed system the total mass of all the matter forms stays constant. We say mass is conserved.
Matter can be transformed from one form into another. It can’t be created or destroyed.
Matter has many forms. Examples are elements, molecules, compounds and mixtures.
The Universe is the ultimate closed system. Small systems can be considered closed if you don’t let matter in or out.
Matter also has many phases like solid, liquid, gas, plasma, amorphous, liquid crystal, etc.
Heat and Temperature
are described by
Temperature is the concentration of heat energy. If the heat energy is more concentrated, the temperature is higher.
All bodies in the same steady environment always come to the same temperature given enough time.
Heat is a form of energy. Heat flows from a warm to a cool body. Cooling is heat leaving. Warming is heat entering.
Analogy: saltiness of seawater. Temperature is an intensive property.
Analogy: total amount of salt in seawater. Heat is an extensive property.
Bodies at the same temperature can feel hotter or cooler because of the different rates at which they transfer heat.
Changes of phase are often accompanied be heat transfer.
Questions?
A. Motion and forceB. Simple machinesC. Energy and massD. Heat and temperature
Demonstrations:
A. Circular motionB. Energy transformationsC. Two identical balls?D. The Heat Solution
A
B
C
D
E
The old incorrect “impetus” theory presumed that the force applied to an object sticks with the object even after the force is no longer in contact with the object.
concrete
abstract
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