Search found 18 matches

by Eric Tam 2D
Sun Oct 25, 2020 9:53 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Format
Replies: 12
Views: 94

Re: Midterm Format

Do we have to scan any work done on scratch paper? My Ta said that we do not have to turn in or scan our scratch paper that the only thing that will be graded is the online exam (the multiple questions). Thank you for your answer! I heard rumors from other posts that we may be penalized for using t...
by Eric Tam 2D
Sun Oct 25, 2020 9:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm scratch work
Replies: 8
Views: 49

Re: Midterm scratch work

What will happen in a situation where I don't know how to solve a specific problem, but get select the correct answer? Will there be a steep penalty?
by Eric Tam 2D
Sun Oct 25, 2020 9:43 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Format
Replies: 12
Views: 94

Re: Midterm Format

Do we have to scan any work done on scratch paper?
by Eric Tam 2D
Sun Oct 25, 2020 9:37 pm
Forum: Balancing Chemical Reactions
Topic: Periodic Table
Replies: 50
Views: 484

Re: Periodic Table

Is there a breakdown of the types of questions on the midterm exam? How many questions will come from each lesson?
by Eric Tam 2D
Sun Oct 25, 2020 9:25 pm
Forum: Student Social/Study Group
Topic: Midterm Prep
Replies: 10
Views: 48

Re: Midterm Prep

Does anyone know what the format of the midterm exam is? (Is it multiple choice, free response, or both?)

Also, are points deducted for demonstrating the wrong process while solving a problem but coming up with the correct answer?
by Eric Tam 2D
Sun Oct 25, 2020 9:16 pm
Forum: Administrative Questions and Class Announcements
Topic: Where can I buy a webcam for a reasonable price?
Replies: 60
Views: 1101

Re: Where can I buy a webcam for a reasonable price?

Does anyone know what angle the external webcam or phone needs to be pointing from? In discussion sections, I heard that the camera needs to show my workspace. How is this achieved?
by Eric Tam 2D
Sun Oct 18, 2020 11:56 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg Indeterminacy Principle Assessment #23
Replies: 2
Views: 23

Re: Heisenberg Indeterminacy Principle Assessment #23

My guess is that a small ∆v would imply that there is unlikely to be a significant error despite the level of uncertainty. Therefore, a small ∆v would not help support the argument in the problem that the speed was measured in error.
by Eric Tam 2D
Sun Oct 18, 2020 11:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Where can I buy a webcam for a reasonable price?
Replies: 60
Views: 1101

Re: Where can I buy a webcam for a reasonable price?

Is it technically possible to take the test beside a mirror to get a similar effect to having an external webcam? If positioned correctly, most angles would be covered.
by Eric Tam 2D
Sun Oct 18, 2020 11:24 pm
Forum: Ionic & Covalent Bonds
Topic: Is ionic or covalent stronger?
Replies: 31
Views: 391

Re: Is ionic or covalent stronger?

From reading the posts, the consensus seems to be that ionic bonds are usually stronger than covalent bonds. Are there examples of special cases where covalent bonds are stronger than ionic bonds? Also, why are some compounds represented as an aqueous solution in some chemical equations, and why doe...
by Eric Tam 2D
Sun Oct 18, 2020 11:01 pm
Forum: DeBroglie Equation
Topic: Measurable Wavelike Properties
Replies: 3
Views: 45

Re: Measurable Wavelike Properties

I was wondering if there was a clear cut off of what wavelength is officially too small to be measured or should we just stick with the idea that anything smaller than around a picometer to 10^15 is too small, like discussed in the de Broglie module video? I think it's a matter of context. Maybe th...
by Eric Tam 2D
Sun Oct 18, 2020 10:40 pm
Forum: DeBroglie Equation
Topic: Wavelike Properties [ENDORSED]
Replies: 9
Views: 147

Re: Wavelike Properties [ENDORSED]

I was also wondering whether a very large object (with a high mass) traveling at an extremely low speed could have a noticeable wavelength. However, I believe that since the velocity would have to be so low, the wave properties of that object are not really taken into account. This would be why a c...
by Eric Tam 2D
Sun Oct 18, 2020 3:32 pm
Forum: Significant Figures
Topic: Sapling HW #4
Replies: 31
Views: 324

Re: Sapling HW #4

I don't understand why a trailing zero isn't a significant figure. If 950000 is different from 950001, then shouldn't all the digits be significant figures? Perhaps I misunderstand the purpose of significant figures. 950000 only has 2 significant figures because it's only precise up to the ten thou...
by Eric Tam 2D
Sun Oct 11, 2020 11:59 pm
Forum: SI Units, Unit Conversions
Topic: Kg to g
Replies: 13
Views: 138

Re: Kg to g

You should look up conversion factors. Try watching this video: https://www.youtube.com/watch?v=jqmIbcId3B0
by Eric Tam 2D
Sun Oct 11, 2020 11:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 103
Views: 7148

Re: Accessing the E-textbook [ENDORSED]

Tiffanny_Carranza_2D Does anyone know where to find a physical copy of the textbook? I bought the e-book but I would really like a physical copy. thank you (: The online UCLA Store is selling physical copies. I believe it does come with a code for the e-book, so you can use it to extend the licensi...
by Eric Tam 2D
Sun Oct 11, 2020 11:32 pm
Forum: Significant Figures
Topic: Sapling HW #4
Replies: 31
Views: 324

Re: Sapling HW #4

I don't understand why a trailing zero isn't a significant figure. If 950000 is different from 950001, then shouldn't all the digits be significant figures? Perhaps I misunderstand the purpose of significant figures.
by Eric Tam 2D
Sun Oct 11, 2020 11:25 pm
Forum: DeBroglie Equation
Topic: Wavelike Properties [ENDORSED]
Replies: 9
Views: 147

Re: Wavelike Properties [ENDORSED]

I understand that larger mass may make wavelengths less noticeable, but so would a lower velocity. Does that technically mean that wavelengths can be observed in objects with large mass and low velocity? Or, must it be a small mass and high velocity as the professor said?
by Eric Tam 2D
Sun Oct 11, 2020 11:18 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Standard Number of Digits for Avogadro's Number?
Replies: 5
Views: 64

Re: Standard Number of Digits for Avogadro's Number?

I also read a version of Avogadro's Number that is 6.02214*10^23 mol-1. I know it's more precise than the previous numbers given, but does it make any difference? Will there ever be a situation in this class where more precision than 6.022x10^23 mol-1 is necessary?
by Eric Tam 2D
Wed Oct 07, 2020 1:22 am
Forum: Significant Figures
Topic: Integers in calculations
Replies: 6
Views: 46

Re: Integers in calculations

I found resources from Saddleback College and Rice University that contain a variety of scenarios that may be encountered. I attached two .pdf files.

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