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Physics Electric and Magnetic Fields
Physics Electric and Magnetic Fields
HS PS3-5
HS PS3-5
Biology
LS2-1 Factors Affecting Ecosystems
Page Under Construction
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PS2 1 Newton's Second Law
Project Zero THINKING ROUTINES
Phenomenon
Watching the direction a spinning wrench travels WIS
What did you see in the movie?
What are you curious about?
What questions do you have?
Motion:
Force and motion
Friction
Acceleration
EXTRA: PULLEYS
Pulley Inquiry activity
Aerospace applications: Pulleys WIS
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HS-PS2-1 Motion and Stability: Forces and Interactions
Analyze data to support the claim that Newton’s second law of motion describes the mathematical relationship among the net force on a macroscopic object, its mass, and its acceleration.
Performance Expectation
Grade: High School (9-12)
Prior Knowledge/Preview
Simple machine review Idaho Public TV
Newton's Law Review and the Hero engine WIS
Forces of Flight: Vertical Take off Smithsonian Learning Lab
Aerospace CONNECTIONS:
Applications and examples
Pulleys WIS
and part ii 120 ton lift start at 1 minute NASA
Newton's 2nd Law demo in Space NASA
Flight control including pulleys FAA
Measuring acceleration in coronal ejections NASA
Newton's Laws in Space Christa McAuliffe Lesson NASA
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Inquiry science
Printable activity
Energy for Life: Cell Respiration activity Go To Lessons 4.3 & 4.4 CK-12
On-line activity
Scroll to the questions in the Cellular Respiration Summary after seeing the videos Texas Gateway
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LAB activities
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Lab #1 Measuring forces
Lab #2 Launch forces
Lab #3 Projectile Motion
Lab #4 Pulley use: the bosun's chair WIS
Lab #5 Pulley inquiry lab--link will be added Washington International School
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EXTENSION material for the curious
PhET Forces and Motion
PhET simulation on projectile motion
Projectile motion with Barney WIS
Part ii Pulley calculations WIS
To discover the magnetic effect of a direct electric current
Newton's First Law
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An object either remains at rest or continues to move at a constant velocity, unless acted upon by a force
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Sum of forces = 0 Change in velocity dv/dt = 0
An object that is at rest will stay at rest unless a force acts upon it.
An object that is in motion will not change its velocity unless a force acts upon it.
The property where massive bodies resist changes in motion is called inertia
PS2 5 Electromagnetism
Project Zero THINKING ROUTINES
Phenomenon
Materials you might not thing of as magnetic--and an everyday use tsbrownie
What did you discover that was new about magnetic materials ?
What surprised you and why?
Prior Knowledge/Preview
Bitesize online activities BBC
Investigating electromagnets
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HS-PS2-5 Motion and Stability: Forces and Interactions
Plan and conduct an investigation to provide evidence that an electric current can produce a magnetic field and that a changing magnetic field can produce an electric current.
Performance Expectation
Grade: High School (9-12)
Car speedometer/Tachometer
Pixabay Logger Wiggler PD
This car speedometer shows 200,000 km driven--more than half of the distance to the Moon
Combining electric and magnetic fields
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Inquiry science
Printable activity
under development
On-line activity
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LAB activities follow safety guidelines above and in the activity
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Lab #1 Investigating solenoids WIS
Lab #2 Human-powered light a dynamo WIS
Lab #3 Use of electromagnetism--the electric bell WIS
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EXTENSION material for the curious
Mathematical relationship between current, length of wire and number of turns in the electromagnet:
The current strength, I
The number of coils, N
The length of the coils, l
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The strength of the magnetic field is proportional to the current, length of coils and number of coils. The equation can be adapted with an equal sign, =, and a constant of proportionality--here "the core material constant"
Aerospace CONNECTIONS:
Applications and examples
Electromagnetism applications in Space--Electromagnetic Induction NASA
Electromagnetism and Neural Cells NASA
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The Science of Electromagnetism
Investigating the magnetic effect of a direct electric current in a wire
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Using a compass
Using iron filings
Need to use direct current (DC) which involves a flow of electrons in one direction--the electron flow is opposite to the current direction because that was determined BEFORE the nature of the current and flow of electrons was known about
Earth's magnetic field discovered in the sixteeenth century by William Gilbert Philatelic origin CC0
Making a solenoid
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Using a soft iron core--an iron nail works well--DC electricity power supply, insulated wire that has the end 2 cm (~1 in) of insulation carefully scraped off with scissors, 2 alligator clips and paper clips
Questions
Using information from the graphs above:
How does increasing the current strength affect strength of the solenoid?
How does the number of coils on the core affect the strength of the solenoid?
How does the length of the coils affect the strength of the solenoid?
Have you produced an electromagnet? How will you know?
Even more . . .
The hand-cranked ball of sulfur on the 1760 electrostatic machine rubbed against a leather pad. The pins on the brass rod set close to the ball transferred the charge from the ball to the rod, called a prime conductor. Suspended from a frame by insulating silk threads, the charged prime conductor allowed a researcher to show electrical properties like attraction, repulsion, and strength of charge See 40 images SI Learning Lab
Joseph Henry (1797-1878), first Secretary of the Smithsonian Institution from 1846 to 1878, designed the most powerful electromagnets of his day SI Learning Lab
Do all materials make electromagnets? What would you test?
What materials would you be unsure about until you tested them?
