## Midterm 1

$\Delta p \Delta x\geq \frac{h}{4\pi }$

Lusin_Yengibaryan_3B
Posts: 101
Joined: Wed Sep 30, 2020 9:33 pm

### Midterm 1

Will the Heisenberg indeterminacy equation be a focus on midterm 1? Will there be more than one question on it? How well do we need to know it for the purposes of midterm 1?

Anil Chaganti 3L
Posts: 99
Joined: Wed Sep 30, 2020 9:52 pm

### Re: Midterm 1

Hey, I believe Heisenberg will be there since it was covered on the modules. Things to know related to this: 1) There is an indeterminacy in smaller objects as their momentum and velocity is unknown when interacting with light. For an object like a baseball, we can determine their position and momentum using distance, time, and they path they traveled. However, for an object like an electron, its position and momentum is unknown as its path is uncertain.
2) The equation for the Heisenberg Indeterminacy Principle is (delta p)(delta x) is greater than or equal to h/4pi where p is momentum (mv) and x is position.

Keerthana Sundar 1K
Posts: 92
Joined: Wed Sep 30, 2020 9:52 pm

### Re: Midterm 1

Just as a general rule for what's going to be on the midterm, everything that was covered in the lectures up until and including today (Wednesday Week 3) will be assessed on the midterm. Heisenberg Uncertainty is one of the concepts covered, so it should be on the Midterm. I hope this helps!

Lisa Wang 3B
Posts: 102
Joined: Wed Sep 30, 2020 9:51 pm

### Re: Midterm 1

I think no one knows for sure if there's going to be more than one question on it until we take the exam. For me at least, it seems to be remembering the formula and then know when to use the components of the equation in the context of the word problem!

Marianna_Shand_3H
Posts: 12
Joined: Thu Oct 08, 2020 12:16 am

### Re: Midterm 1

I don't think anyone knows for sure, but I would study and be ready for it anyways. Also I'm wondering if there is a list of materials we are allowed to use during the midterm?

Nhu Pham-Dis3G
Posts: 50
Joined: Wed Feb 26, 2020 12:15 am

### Re: Midterm 1

I think you should know how to apply the formula to solve certain problems and also know which variable in the formula stands for so that you can plug in the numbers. However you don't have to memorize it or anything like that because a formula sheet will be provided!

Binyu You
Posts: 54
Joined: Wed Sep 30, 2020 9:37 pm

### Re: Midterm 1

I believe this will be covered in Midterm, but I don't think it will be the main focus of Midterm. For the Heisenberg Indeterminacy, you just need to understand only small things such as electron, because their momentum is lower than light, it makes them go to other pathways. This makes their pathway unknown, which makes the distance unknown. This provides an uncertainty in velocity, and thus give the equation of delta p=Mass of electron-delta v

Simer_Shera_2D
Posts: 104
Joined: Wed Sep 30, 2020 9:58 pm
Been upvoted: 1 time

### Re: Midterm 1

Marianna_Shand_3H wrote:I don't think anyone knows for sure, but I would study and be ready for it anyways. Also I'm wondering if there is a list of materials we are allowed to use during the midterm?

According to his email and information we receive from TAs, I think we're limited to the periodic table, constants sheet, and maybe some scratch paper?

Kristina Krivenko 3I
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### Re: Midterm 1

Marianna_Shand_3H wrote:I don't think anyone knows for sure, but I would study and be ready for it anyways. Also I'm wondering if there is a list of materials we are allowed to use during the midterm?

In his last email, Dr. Lavelle said that we are allowed to use periodic table, the constants and equations sheet as well as a scientific calculator. He said that we should print out the periodic table and constants and equations sheet and can use the back of those as scratch paper. Also, although Dr. Lavelle stated that we need a scientific calculator, I've heard from my TA and some of the UAs that for this midterm, it doesn't matter whether we use scientific or graphing calculator. Hope this helps :)

FionaHunter21
Posts: 87
Joined: Wed Sep 30, 2020 9:37 pm

### Re: Midterm 1

I think Dr. Lavelle specifically changed the order of questions on the Sapling homework so that problems 1-19 were wat would be on the midterm, so I would study those topics to the extent they are talked about in the homework.

Kayla Booker 1F
Posts: 86
Joined: Wed Sep 30, 2020 9:43 pm

### Re: Midterm 1

I believe it would be on the midterm. Since my TA said that everything from week 1 to Wednesday of week 3 is free game.

Charmaine Ng 2D
Posts: 92
Joined: Wed Sep 30, 2020 9:37 pm

### Re: Midterm 1

Yep, I'm pretty sure I remember my TA mentioning that Heisenberg could be on the test, since it was covered before today! I don't know how many will be on the midterm, but it's always good to familiarize yourself with it!

Posts: 55
Joined: Wed Sep 30, 2020 9:55 pm

### Re: Midterm 1

Anil Chaganti 2C wrote:Hey, I believe Heisenberg will be there since it was covered on the modules. Things to know related to this: 1) There is an indeterminacy in smaller objects as their momentum and velocity is unknown when interacting with light. For an object like a baseball, we can determine their position and momentum using distance, time, and they path they traveled. However, for an object like an electron, its position and momentum is unknown as its path is uncertain.
2) The equation for the Heisenberg Indeterminacy Principle is (delta p)(delta x) is greater than or equal to h/4pi where p is momentum (mv) and x is position.

Thank you so much for these !

Posts: 113
Joined: Wed Sep 30, 2020 9:51 pm

### Re: Midterm 1

Yea this will be on the exam

Xavier Herrera 3H
Posts: 87
Joined: Wed Sep 30, 2020 9:37 pm

### Re: Midterm 1

Some of the conceptual points we would probably have to know about the Heisenberg equation is that delta x and delta p represent the indeterminacy in momentum and position for an electron, and there is a limit to how certain you can be of either.

605291562
Posts: 86
Joined: Wed Sep 30, 2020 10:07 pm

### Re: Midterm 1

I think because we covered it in our lectures before when he indicated it's fair game for the midterm.

Kyle Dizon 3A
Posts: 91
Joined: Mon Oct 05, 2020 12:16 am

### Re: Midterm 1

I think you should master the equation just in case it will show up on the midterm. Since it was on the lecture, it is a possibility that it will be an equation that we may require to use during the midterm.

Lillian
Posts: 69
Joined: Wed Sep 30, 2020 9:48 pm

### Re: Midterm 1

You will definitely need to know it for the midterm, but I wouldn't stress too much over it to the point of not studying for other topics. It's only one topic out of many we've covered so make sure that you know the basics of it I guess.

Jerry_T
Posts: 89
Joined: Wed Sep 30, 2020 9:46 pm

### Re: Midterm 1

The Heisenberg Indeterminacy concept will most likely be on the exam since he said anything up till 10/21 lecture would be on exam.