2/29

Leaping into waves (sounds like we're at the beach!)


Objective:  SWBAT calculate harmonic frequencies.


Warm Up:  Get out your notes and spread out.  Pop quiz on wave basics.

2/28

Objective:  SWBAT determine the resultant wave that occurs when two waves meet at the same place at the same time.


Warm Up:  A wave traveling 2 m/s hits the shore of the bay once every 1.5 seconds.  The wave is 1 m high.  What is the amplitude, frequency and wavelength of the wave?

2/27

It's Melodious Monday- as we start our unit on Sound


Objective:  SWBAT calculate the frequency, wavelength, and period of a wave


Warm Up:  Pick up one syllabus for the unit.  What is the relationship between frequency and period.  How does this apply to waves?

Blogger doesn't support the school system's version of internet explorer anymore which is why there are no posts for earlier in the week.  BUT, there is always a work around.  I <3 Chrome!


Objective:  SWBAT review for tomorrow's test on magnetism and induction of current.


Warm Up:  Pick up two papers.  One is a reference page for the major equations of this unit.  Get out your magnetism and induction problems.  What is the direction of an induced current in a loop of wire oriented perpendicular to the ground that has a magnetic south pole below it that is moving further below the plane of the wire?

2/17

Objective:  SWBAT use Lenz's Law to determine the direction of the opposing magnetic field produced by an induced current.

Warm Up:  Get ready to take some notes.  Get out your right hand.  Time for some right hand rule practice!

2/16

Objective:  SWBAT build a simple electric motor.

Warm Up:  A wire of length 0.655 m carries a current of 21.0 A.  In the presence of a 0.470 T magnetic field, the wire experiences a force of 5.46 N.  What is the angle (less than 90 degrees) between the wire and the magnetic field?

2/15

Objective:  SWBAT determine the strength and direction of magnetic forces and fields due to current carrying wires.

Warm Up:  Get out your magnetism problems workshhet.
An electric power line carries a current of 1400 Ain a location where the Earth's magnetic field is 5.0 x 10^-5T.  The line makes an angle of 75 degrees with respect to the field.  Determine the magnitude of the magnetic force on a 120 m length of line.

2/14

Hey, for Valentine's Day, take the day off.  It's my gift to you ;-)

But if you are bored (and finished with your Magnetism problems) check out the physics of flying cupid pigs in Angry Birds.  http://www.wired.com/wiredscience/2011/02/angry-birds-and-the-valentines-pendulum/

2/13

Objective:  SWBAT determine the effect of a light bulb blowing out on the equivalent resistance of the circuit, as well as the current and voltage drop of the remaining light bulbs.

Warm Up:  Pick up two papers.  Find Req and I tot for the circuit on the board.  Then find V and I for each resistor.

2/10

Objective:  SWBAT determine the direction of the force that is the result of a magnetic field.

Warm Up:  A current carrying wire is carrying current upward.  What is the direction of the force south of the wire?  To the east of the wire?

2/9

Objective:  SWBAT map the fields of several different types of magnets using a compass.

Warm Up:  An alpha particle is moving in the +x direction when it encounters a magnetic field oriented into the floor.  What direction will the alpha particle feel the resulting magnetic force?  What will be the direction of the alpha particle's acceleration?

2/8

Objective:  SWBAT map the magnetic field around a magnet.

Warm Up:  A wire coil in a spaker has a diameter of 0.025m and contains 55 turns of wire.  It is placed in a 0.1 T magnetic field that is perpendicular to the wire.  The current in the wire is 2.0 A.  Determine the magnetic force that acts on the coil.

2/7

Objective:  SWBAT calculate the magnetic force on a charge and determine the direction of the force using the right hand rule.

Warm Up:  A proton is moving from left to right in the classroom and encounters a magnetic field directed from the front to the back of the classroom.  What direction will the magnetic force be on the proton?  What direction is the force if the particle were an electron instead of a proton?

2/6

Anyone who missed Friday's test needs to come in Tuesday A lunch to make it up.

Warm Up:  Did you pick up a Ch 20 and Ch 21 syllabus Friday?
Turn in your Ch 21 Outline.  Pick up one handout.
List the 4 fundamental forces of the Universe.  Of them, which is the weakest force?

2/2

Will Phil see his shadow.....

Objective:  SWBAT review for tomorrow's test on current and circuits.

Warm Up:  Turn in your homework now.  Class is meeting in Mr. Scopel's room so that they can use ours to do a lab.  AFTER the pledge and announcements, pick up your stuff and quietly move to his room.