## Search found 109 matches

Sun Oct 13, 2019 8:44 pm
Forum: Properties of Light
Topic: Quick question on equations
Replies: 5
Views: 50

### Re: Quick question on equations

It is definitely better to know the equations and have them memorized but I believe that most equations will be provided in the first sheet of any test given.
Sun Oct 13, 2019 8:38 pm
Forum: Properties of Light
Topic: Photoelectric Effect
Replies: 7
Views: 72

### Re: Photoelectric Effect

Since a vacuum chamber is a rigid enclosure, less interference occurs and the results can be more accurate.
Sun Oct 13, 2019 7:58 pm
Forum: Einstein Equation
Topic: E=hv
Replies: 43
Views: 4673

### Re: E=hv

E in the equation represents energy but can also be used to find the energy needed to remove an electron!
Sun Oct 13, 2019 7:44 pm
Forum: DeBroglie Equation
Topic: DeBroglie Equation
Replies: 9
Views: 136

### Re: DeBroglie Equation

The DeBroglie Equation can not be applied to light because light has no mass.
Sun Oct 13, 2019 12:39 am
Forum: Properties of Light
Topic: Frequency vs. Wavelength
Replies: 15
Views: 187

### Re: Frequency vs. Wavelength

Frequency and wavelength are related to one another. Waves with higher frequencies have shorter wavelengths while lower frequencies have longer wavelengths.
Fri Oct 04, 2019 1:17 am
Forum: Molarity, Solutions, Dilutions
Topic: HW question G11
Replies: 3
Views: 43

### Re: HW question G11

As previously mentioned, we need to isolate the liters of the solution because that is what the question is asking for. Thus, we would manipulate the equation molarity = (moles solute/L solution) to become L solution = (moles solute/molarity). Then we plug in all the numbers that were given and solv...
Fri Oct 04, 2019 1:10 am
Forum: Limiting Reactant Calculations
Topic: M.11
Replies: 3
Views: 116

### Re: M.11

Everything is definitely correct up until you multiplied 0.040 mol O2. Your molar ratio is switched! You want to get ride of mol O2, therefore you want to multiply 0.040 mol O2 by (1mol P4O10/2molO2) Thus, both mol O2 cancel out and the answer becomes 0.020 mol P4O10. I hope this helps!
Fri Oct 04, 2019 1:04 am
Forum: SI Units, Unit Conversions
Topic: Sig Fig Rules
Replies: 7
Views: 118

### Sig Fig Rules

Is the rule for sig figs that same for both addition/subtration and multiplicatiopn/division or do they differ?
Fri Oct 04, 2019 1:01 am
Forum: Significant Figures
Topic: How many sig figs when in decimals?
Replies: 6
Views: 163

### Re: How many sig figs when in decimals?

I attended Step-Up session today and we went over sig figs. The UA told us to remember this:
1) Non-zero digits are always significant.
2) Any zero between two digits are significant.
3) Final zero or trailing zero in decimal portion ONLY are significant.
Hope this helps!