Quiz Definition and 168 Threads

Anyone ever talk introducing about a problem of the week. Where a user actually gets several attempts at an answer. I'm talking about a legitimate quiz type setup, complete with multiple choice automated system...not hidden responses. They did this at Brilliant and it was great engagement...

Here are faces of 20 classical scientists whose names are associated with physical units. Early 1600s to early 1900s. At first glance through, how many do you know for certain? Some physicsforum members will most likely know them all! (I only got 4.) Now, if you did not know them all at...

I do not know how to do that.

Hi, I want to write some interactive Physics lessons, where students can engage with Phet Simulations and then answer some quizzes to test their thinking along the way. Any of you did that, or similar? Please, let me know if anything is unclear. I sincerely hope you can have a great time...

Question: Where is an angle of 10.5π radians in standard position located? A. On the positive vertical axis B. On the negative vertical axis C. In the second quadrant D. In the fourth quadrant I thought I had to divide 10.50 by 3.14, which I thought yielded 3.34π. Then I subtracted 3.34π...

I utilized an Ultrashort Pulse Calculator on a website (https://www.rp-photonics.com/ultrashort_pulses.html) and got the bandwidth of 9.39nm with the specifications listed above. Then divided the wavelength by the bandwidth, and it came out 85(optical cycles). However, I am not sure if it is...

R = 1.22*700nm/(1.3+0.95) ≈ 380nm

1. $f(x)=(2x+1)^3$ and let g be the inverse function of f. Given that$f(0)=1$ what is the value of $g'(1)$? A $-\dfrac{2}{27}$ B $\dfrac{1}{54}$ C $\dfrac{1}{27}$ D $\dfrac{1}{6}$ E 6 2. given that $\left[f(x)=x-2,\quad g(x)=\dfrac{x}{x^2+1}\right]$ find $f(g(-2))$...

[mentor note: edited for clarity] The man weighs 100kg. All constructions, ropes, universal joints, rollers, fans, etc are massless. Friction between weight scale and feet or construction is enough to hold side forces... The red line is the rope. What will the weight scale show? <100kg...

Continue reading...

Greg Bernhardt submitted a new blog post Inventions and Inventors Quiz Continue reading the Original Blog Post.

Greg Bernhardt submitted a new PF Insights post Match the Scientist with the Story Continue reading the Original PF Insights Post.

https://scontent-arn2-1.xx.fbcdn.net/v/t1.0-9/31131486_10155149285526260_4418766605865975808_n.jpg?_nc_cat=0&oh=53840620f886c5dab249cc2a8ff1010b&oe=5B4E8CA6

Greg Bernhardt submitted a new PF Insights post Name the Science Book Author Continue reading the Original PF Insights Post.

You have a glass of water with a cork floating in it. The cork is attached by a spring under some tension that is also attached to the bottom of the glass so the cork is slightly pulled deeper in the water than just by its own weight thus the cork has a bit more buoyant force. The cork always...

Can anyone explain the behavior of light I came across as I sat in my lounge this evening having a nice cup of Mocha . Hint ( I am sitting in a room with some led ceiling lights on) can you: 1.Guess how many Led lights I have on 2.Explain the appearance of light which is looking like a typical...

TheAdmin submitted a new PF Insights post Name the Scientist Continue reading the Original PF Insights Post.

I've mentioned in another thread that I'm slowly reading through a bunch of books this summer on the general topic of "knowledge and expertise vs. ignorance and opposition to expertise." One of these books is The Knowledge Illusion: Why We Never Think Alone, by cognitive scientists Steven Sloman...

Would you consider yourself creative? http://www.testmycreativity.com

TheAdmin submitted a new PF Insights post PF Insight Scavenger Hunt 2 Continue reading the Original PF Insights Post.

TheAdmin submitted a new PF Insights post Test Your NASA Knowledge Continue reading the Original PF Insights Post.

TheAdmin submitted a new PF Insights post Think You Know Stephen Hawking Continue reading the Original PF Insights Post.

TheAdmin submitted a new PF Insights post Name the Science Photo Continue reading the Original PF Insights Post.

Airwolf (from the T.V show Airwolf) is a Mach 1+ helicopter capable of reaching speeds up to Mach 2. For it's time, it's weapons system was pretty farfetched (had fourteen weapons systems overall, including chaffe and flares) at it's time. I'm well aware of the limits of regular helicopters'...

Greg Bernhardt submitted a new PF Insights post The Moon Quiz Continue reading the Original PF Insights Post.

Hey, i have question, i am in a year to prepare us for us college life, and in our physics class the teacher say we should read a chapter then take a quiz in it then he gove us a lecture in it. So is it the system in the us?

http://www.chilimath.com/flash-quiz/algebra/intermediate/oef/odd-even-functions-quiz.html']<[/PLAIN] Mentor Note -- thread moved to HH from the technical math forums, so no HH Template is shown > http://www.chilimath.com/flash-quiz/algebra/intermediate/oef/odd-even-functions-quiz.html In this...

I am looking for a question generator that adapts to a student's level, and continues to ask basic questions as new topics are learned. Khan Academy is close, but once a subject is mastered Kahn stops giving questions on the subject, and I then tend to forget the approach to the problem. Does...

I recently quizzed physicists in my workplace with the following question: The speed c in the second postulate refers to: a) the one-way speed of light b) the round-trip speed of light c) Both d) Neither I was surprised at the variety of answers. What do you say?

Does anyone know if it is possible to get on web an exam sample or quiz or exercises, on "Quantum cascade lasers"? Thank you.

Greg Bernhardt submitted a new PF Insights post The Isaac Newton Quiz Continue reading the Original PF Insights Post.

Here's a fun little quiz to test your problem solving skills. It's something I'd recommend all scientists or aspiring scientists take a shot at, as I learned a lot by taking the quiz: http://www.nytimes.com/interactive/2015/07/03/upshot/a-quick-puzzle-to-test-your-problem-solving.html It's...

Greg Bernhardt submitted a new PF Insights post It's Elemental! The Periodic Table Quiz Continue reading the Original PF Insights Post.

I've got a technical job interview tomorrow for a robotics related position. I have asked to prepare for questions as follows. "I would prepare to be comfortable answering questions on programming fundamentals and standard practices, including memory management, algorithms, and object-oriented...

Hello everybody. :) If any of you have seen the quiz show "The Chase", then you will understand the background to what I am about to describe. If not, here are wiki links for the original UK version and the similar US version. My question is inspired by the "head-to-head" or "individual chase"...

Homework Statement What is the acceleration due to gravity at an altitude of 1.00 x 10^6 above the Earth's surface, given that the radius of the Earth is 6.38 x 10^6 m?Homework Equations Using g = GMm/r^2 Fc = mv^2/r The Attempt at a Solution Fc = mv^2/r How can I solve this equation if I am...

Homework Statement If a particle moves in a plane so that its position is described by the functions x=Acosωt, and y= Asinωt, it is (A) moving with varying speed along a circle (B) moving with constant speed along a circle (C) moving with constant acceleration along a straight line (D)...

I've taken career quizzes and usually been disappointed. This one, however, got me really nicely and it correctly got my father as a mathematician/computer programmer. http://shobia.com/career-finder Any thoughts?

How are you at pub quiz es, i have just joined a team and an doing quite well but to be [good] i would have to improve significantly as the amount of knowledge needed is huge.

Homework Statement An unknown organic compound was analyzed in a carbon-hydrogen analyzer. The combustion of a sample of the compound produced 35.2 g of carbon dioxide and 18.0 g of water. The molar mass of the compound was found to be 116.28 g/mol. Determine the molecular formula of the...

Good evening. I'd like to first start by saying I am new to this forum, and I am a physics noob. I know that very fact will help people shy away from trying to help me answer this question. This problem (which an image is posted) is 1 of 5 questions on a take home kinematic quiz. I've managed to...

the variables X1,X2,... are independents and taking values 1 and -1 and their expected value E(Xj)=0 and we have Y=X1+X2+X3+...+Xn AND Z=X1+X2+X3+...+Xn+1 find the ρ(Y,Z) for n=46 i know that ρ(Υ,Ζ)=COV(Y,Z)/(σΥ*σZ) where σY = sqrt(varY) and σZ=sqrt(varZ) how i can find them because we...

I don't get it guys. 100% on all the quizes and homework. 42% on the final... Deptartment policy is that you have to get a 60% or above on the final to get a D no matter what your grade is. i understand integration by parts just fine, trig sub just fine, integration with trig functions...

In the expansion of ((x1 + x2 +... + x33) ^ 4) how many monomials are of the form (xi ^ 2)*(xj^2) with i not equal with j if we add the coefficients of all these mononymon what is the sum? E.g. the expansion of (x1 + x2 + x3) ^ 4 the requested number is 18 this is a probability quiz...

Good language "quiz" software I have -unsuccesfully for some reason- been trying to find a "quiz" type program for learning languages. The reason is that I have a 12 year old at home who struggles a bit when it comes to learning new words on his own. All I (well he) need is a program which...

i would like to have some help here.. it is a problem in probabilities i can not find anyway to start finding the functions any ideas and help will be apriciated. How many functions are there from the power set of all (0,1,2,...,9) with values in total (a,b,c)? The number is too large...

It's about time for a new quiz! :smile: http://psychcentral.com/quizzes/narcissistic.htm My results:

I am writing on this forum because I'm extremely troubled... I recently had a quiz in my "Project Lab" for which I just received my results. ...The entire course revolved around building a variable power supply. There was no theory class to support the lab. ...Before receiving the marked...

I hooked up a small circuit I found towards the bottom of this url and plotted the result in a spreadsheet (figure 1). Figure 2 shows the DC-coupled output waveform at 12V input. Only the frequency changes at different input voltages. So what's going on here? Figure 1: Figure 2: Hint 1...

Is water a pure substance? I had a question on a quiz and it said which is not correct. I answered "Water is a pure substance" and got it wrong. The correct answer was "Elements occur only in the form of atoms." Explanations please, thank you.