# HP Cycle 33

## 3/28 - 3/31

M 3/28

T 3/29

W 3/30

Th 3/31

### π’ 6: M 3/28, π΅ 8: M 3/28 - electroscope lab observations

Today, we will try to describe what is happening when we operate a gold leaf electroscope.

Watch the following video and record your observations on the Electrostatics Lab hand-out. See the example for #1 for how to record your observations.

If you finish early, start watching homework videos.

Handout: Electrostatics Lab

Homework: LAB QUIZ on Forensic Physics on Wednesday, March 30th. Finish drawing in your observations to the Electrostatics Lab. Then watch the following videos. Make a good effort to understand these videos because we will be using that knowledge in class next time.

### π©β 6: W 3/30 - Forensic Physics Lab Quiz

Pd 6 - LAB QUIZ on Forensic Physics Today.

Homework: Finish watching any of the above videos from last time. Also, complete the Electrostatics Charging Worksheet (PH) that was distributed in class.

### π¦ 8: T 3/29 - electroscope charges

Today, you will visualize and draw where excess positive and negative charges appear while charging an object. We will utilize our knowledge from the videos by collectively trying to complete Electrostatics Charging Worksheet (PH).

Then, based on the what we've learned about charging in the last two classes, we will attempt to explain what is happening inside the electroscope during the Electrostatics Lab . Try to draw excess charge by drawing positive and negative signs in your Electrostatics Lab and annotate with new vocabulary. (Let's assume that plastic becomes negative and acetate becomes positive for uniformity.) For example, here's what I'd expect to see for number 1.

If there are no positive and negative signs, that does not mean that there aren't any positive or negative charges in that location (of course you know there will be protons and electrons there), but rather it just means that there are an equal number of those positive and negative charges. Add you charges and annotations to Electrostatics Lab handout from last time. Check the resource below for more explanations.

Resource: The Physics Classroom - Electrostatics - review lessons 1 & 2

Handouts: Electrostatics Charging Worksheet (PH), Electrostatics Lab (last time)

Homework: Finish drawing in electroscope charges on Electrostatics Lab due next class.

### π 6: Th 3/31 - electroscope charges

Today, you will visualize and draw where excess positive and negative charges appear while charging an object. We will utilize our knowledge from the videos by collectively trying to complete Electrostatics Charging Worksheet (PH).

Then, based on the what we've learned about charging in the last two classes, we will attempt to explain what is happening inside the electroscope during the Electrostatics Lab. Try to draw excess charge by drawing positive and negative signs in your Electrostatics Lab and annotate with new vocabulary. (Let's assume that plastic becomes negative and acetate becomes positive for uniformity.) For example, here's what I'd expect to see for number 1.

### πβ 8: W 3/30 - Forensic Physics Lab Quiz

Pd 8 - LAB QUIZ on Forensic Physics Today.

With any remaining time, we'll go over the Electrostatics Lab charges.

Homework: Finish drawing the charges in the Electrostatics Lab, and make sure it all makes sense to you.

If there are no positive and negative signs, that does not mean that there aren't any positive or negative charges in that location (of course you know there will be protons and electrons there), but rather it just means that there are an equal number of those positive and negative charges. Add you charges and annotations to Electrostatics Lab handout from last time. Check the resource below for more explanations.

Resource: The Physics Classroom - Electrostatics - review lessons 1 & 2

Handouts: Electrostatics Charging Worksheet (PH), Electrostatics Lab (last time)

Homework: Finish drawing in electroscope charges on Electrostatics Lab due next class.

### ππ OPTIONAL for everyone - β©οΈ Pivot electrostatic repulsion

You can elect to do an optional lab in β©οΈ Pivot Interactives called "Exploring Electrostatic Repulsion." In this activity, we'll qualitatively explore what happens when two balloons with like charges repel. Think about what the charge diagrams would look like for the balloons as it relates to the electroscope lab.

Homework: β©οΈ Pivot Interactives "Exploring Electrostatic Repulsion" due on Friday at 10pm. No late work will be accepted. No exceptions.