4/9 qod

How did we use marshmallows to measure the speed of light?

--ch

3/16 qod

What causes the Doppler effect?

--ch

3/15 qod

How does elasticity affect the speed of sound?

--ch

3/13 qod

How did you control the variables in the pendulum experiment?

--ch

3/12 qod

How did you control your variables in your pendulum experiment?

--ch

3/9 qod

What do you think were some of the biggest barriers to making the windmills lift more weight?

--ch

Mukherjee 3/8

At the beginning of class, we turned in the Section 4 lab and homework. Then, Mr. Ebersole went around to see if we did our homework, which was the equivalent resistance packet. We went over the answers in class and Mr. Ebersole did a few problems on the board. Afterwards, we took the Ohm's law and circuit quiz. When we were done with the quiz, we were supposed to complete a worksheet titled "The Swinging Pendulum." This worksheet needs to be done by Tuesday. There is no additional homework besides the windmill, which is due tomorrow.

Q: What variables affect how long it takes for a pendulum to swing back and forth?

A: I am not completely sure what variables cause a pendulum to swing longer, but I think pulling the bob back farther would cause the pendulum to swing more.

3/8 qod

What variables affect how long it takes for a pendulum to swing back and forth?

--ch

Mazzella 3/7

Today at the beginning of class we were originally supposed to turn in lab section 4 and homework section 4. the due date was pushed back until tomorrow so that we would be able to prepare ourselves for tomorrow's quiz over lab 3, lab 4, and today's class notes. the class was then reminded that windmills are due on Friday. today's notes were over ohm's law and equivalent resistance.
ohm's law is V=iR where V is the battery voltage, i is the current, and R is resistance.
the equivalent resistance of a series network is the sum of each resistor or Req=R1+R2+R3...
the equivalent resistance of a parallel network is the reciprocal of the sum of the reciprocal of each resistor or (1/R)=(1/R1)+(1/R2)+(1/R3)...
for each of these concepts we completed some of the example problems.
in the middle of the notes Jacob mentioned never wanting to talk about parallels again and the next slide was about the equivalent resistance of parallel networks.
at the end of class, we were given about ten minutes to work on our homework which was an electric circuits worksheet that is due tomorrow.
QOD: Use the mathematical equations for finding equivalent resistance to explain the results you observed for bulb brightness in the lab.
R=R1+R2+R3... can be used to explain bulb brightness because the resistance from each light bulb in a series adds up to a total resistance. when that total resistance was higher the current was decreased. in the equation V=iR, if voltage is kept the same and resistance increases, the current must decrease.
1/R=1/R1+1/R2+1/R3... can be used to explain bulb brightness in the same way except that parallels decrease resistance and therefore increase the current if the battery voltage is kept constant.

3/7 qod

Use the mathematical equations for finding equivalent resistance to explain the results you observed for bulb brightness in the lab.

--ch

3/7 qod

Use the mathematical equations for finding equivalent resistance to explain the results you observed for bulb brightness in the lab.

--ch

3/6 qod

Why is it better when Christmas tree lights are wired in parallel vs. series?

--ch

3/5 qod

If you add bulbs in parallel, what happens to resistance and flow through the battery?

If you add bulbs in series, what happens to resistance and flow through the battery?

--ch

3/2 qod

You have a circuit with multiple switches and bulbs.  You are asked to rank the bulbs in all possible switch positions.  Please describe how you should report your answer.


-ch

3/1 qod

There are two circuits.  One circuit has two bulbs in series.  The other circuit has two bulbs in parallel.  Which circuit has the brighter bulbs?  Explain why.

--ch