## Search found 65 matches

April 16th, 2019, 7:44 pm
Forum: 2019 Question Marathons
Topic: Circuit Lab B/C
Replies: 154
Views: 14148

### Re: Circuit Lab B/C

Explain the mathematical difference between the Product of Sums and the Sum of Products procedures of Boolean expressions
`Think variables and complements`
April 16th, 2019, 7:00 pm
Forum: 2019 Question Marathons
Topic: Circuit Lab B/C
Replies: 154
Views: 14148

### Re: Circuit Lab B/C

https://i.stack.imgur.com/whAm7.png Suppose you find an LED whose datasheet contains the above graph. What value resistor should you put in series with this LED and a 5V power source in order to have a current of 20 mA going through the circuit. Answer|Is it 175 ohms? Not quite, but I see what you ...
April 16th, 2019, 5:50 pm
Forum: 2019 Question Marathons
Topic: Circuit Lab B/C
Replies: 154
Views: 14148

### Re: Circuit Lab B/C

wec01 wrote:
Suppose you find an LED whose datasheet contains the above graph. What value resistor should you put in series with this LED and a 5V power source in order to have a current of 20 mA going through the circuit.
`Is it 175 ohms?`
April 15th, 2019, 6:30 pm
Forum: 2019 Question Marathons
Topic: Circuit Lab B/C
Replies: 154
Views: 14148

### Re: Circuit Lab B/C

UTF-8 U+6211 U+662F wrote: I love this drawing
`8.36 kiloohms?`
Thank you, haha!
April 15th, 2019, 6:29 pm
Forum: The Polling Place
Topic: What is your favorite group of orchestral instruments?
Replies: 0
Views: 339

### What is your favorite group of orchestral instruments?

A recent discussion between my family about a recent orchestral viewing sparked this
April 15th, 2019, 6:06 pm
Forum: 2019 Question Marathons
Topic: Circuit Lab B/C
Replies: 154
Views: 14148

### Re: Circuit Lab B/C

C Only

Given this orientation of an operational amplifier, find the value of Rf (in kΩ) if the Vin = 20 mV, Rg = 3.8 kΩ, and Vout = 64 mV
(sorry for my bad drawing, haha)
April 15th, 2019, 4:40 pm
Forum: 2019 Question Marathons
Topic: Circuit Lab B/C
Replies: 154
Views: 14148

### Re: Circuit Lab B/C

UTF-8 U+6211 U+662F wrote:Restarting... what force is exerted between two protons one meter apart?
Using Coulomb's law and knowing protons are elementary charges.... F = (9x10^9)(1.6x10^-19)(1.6x10^-19) / (1)^2... Would the answer be 2.30x10-28 N?
April 14th, 2019, 12:09 pm
Forum: 2019 Study Events
Topic: Herpetology B/C
Replies: 239
Views: 29900

### Re: Herpetology B/C

dish123 wrote:Thanks, I have been mainly using ADW, do you recommend I go back to all the fact sheets and all the other websites?
That is completely up to you.
April 14th, 2019, 11:21 am
Forum: 2019 Study Events
Topic: Herpetology B/C
Replies: 239
Views: 29900

### Re: Herpetology B/C

On ADW, sometimes they give information onmore than one species for the genus, which species information should I use for the fact sheet? For example, for Sceloporus, there is information on both Sceloporus Undulatus, and Sceloporus Woodi...which one should I make my fact sheet on? Try to find the ...
April 14th, 2019, 6:26 am
Forum: General Chat