Science quiz

Yeah, Six Flags, it wasn't as fun as I expected... Bobbejaanland is better.

It doesn't depend on speed, either way you will fall, if you don't apply a reactional force to the ground. But which direction?!

How ya doing, buddy?

Originally Posted by Giro0001

Missed the point. When I mentioned the parabola I was speaking of the equation which is a function of the distance h from the top of the water at height H which represents the distance x from the canister where the stream of water hits the table. I didn't have the actual equation of the trajectory anywhere in my calculations.

Whoops, my bad. I had seen a slightly different question a few days ago and assumed you were going at it the same way that we had approached that one.

Here's a good one I heard today.

Quote:

Your dog is running away from you at 2 m/s. Every time you whistle for him he doubles his speed. How many times will he hear you whistle?

This thing is sticky, and I don't like it. I don't appreciate it.

How many times do I whistle, at which time intervals? Does echo reflection count? And how good is the dog's hearing?

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Dog can hear infinitely far, you can whistle as fast as you can in real life, and sound propagates infinitely far.

Just imagine as though you're on an infinite plane with nothing else there other than the dog and you.

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I suppose it's about 8 times (edit: more like 7 times - depends on how you count ;P *valid excuse* ) the dog will hear you -

Since it doubles its speed every time, you'll have to count 2^x - and I tried it out...

It reaches sonic speed (which is 343 m/s under normal conditions) at about 2^8.45 (349.706)

That's my guess here... =(

What kind of toxic man-thing is happening now?

Nope, neither guess is correct.

FELIPE NO

My guess would be 15
8 times till he's faster than the speed of sound at which time he'll overtake the sound waves of your previous whistles.

I'll assume he'll accelerate the same instance he hears the 8th whistle so he won't hear it twice.
Otherwise: 16

What, you don't want my bikini-clad body?

Yeah, 15 is the answer. Everyone I've told that one to had that, "Man, that's a great question" reaction upon hearing the answer. I liked it because it had a good trick.

Jam it back in, in the dark.

Hmm, intruiging.

When you use Doppler for a moving observer and standing source. You would see that the frequency will change.

This is the formular for an observer going away from the standing source:

f'=f(c-v)/c
c=sound velocity of source
v=velocity of observer moving away from source

Now for the dog problem we have something analogical:

f'=f(v-c)/v (not entirely sure)

v=velocity of the dog
c=velocity of the whistling sound

f'=1000(350-343)/350=20 Hz (approximately, assuming ideal temperature, pressure)

Too bad... the dog can hear this sound. So yeah 15 times. Unless the whistle is of a lower frequency, like the lower sol on a piano. ~400 Hz?

There's nowhere I can't reach.

Originally Posted by RacinReaver

I liked it because it had a good trick.

Yeah - that's a nice trick; Too bad I haven't thought about it that way!

... I need to learn thinking twice ... the right way.

This thing is sticky, and I don't like it. I don't appreciate it.

Try with this one, less physics more logical thinking.

You have two strings whose only known property is that when you light one end of string it takes exactly 5 minutes or 10 minutes to burn. The rate at which the strings will burn is completely random and each string is different. How to measure with them 7,5 minutes ?

I am a dolphin, do you want me on your body?

Hmmm, interesting question.

I'd try to light both strings at the same time.
When the 5 minute string is burnt up, light the other string also at the other end. When that string is wasted, it should be exactly 7.5 minutes?

I was speaking idiomatically.

Yes! The main idea was to light the string on both ends. Notice that it's even easier to burn the first one (lighting on both ends) which is 2,5mins, and then the second one on both ends, which gives 5 minutes, and a total of 7,5 minutes.

Next one:

Find the next object in the following sequence

o, t, t, f, f, s, s, e, n, t, ...

Good luck=D

What kind of toxic man-thing is happening now?

No!!! I got those tests on my assessment, and I'm still having nightmares about them...

Spoiler:

To be honest I didn't find it. After thinking about it for 10 minutes I went mad and searched it up. But I'm not American you know, it's less obvious. But yeah, my IQ is only 120... As a mathematician you search for logical series and numerical things and when you finally see it you feel so stupid.

And I hope they don't put this one in the assessments because it's so unfair.

Another one they used was this:

d, o, m, i, s, o,...

I mean, that's just lame... people who don't play music can't possibly know this answer. I hate those consultants who make these tests.

FELIPE NO

Does o-f-f-s-e-t have anything to do with the answer?

What, you don't want my bikini-clad body?

No, 'offset' has nothing to do with it. The answer is incredibly simple, but requires an idea.

btw I ensure you that the answer doesn't require any major knowledge.

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Originally Posted by Lambert

Yes! The main idea was to light the string on both ends. Notice that it's even easier to burn the first one (lighting on both ends) which is 2,5mins, and then the second one on both ends, which gives 5 minutes, and a total of 7,5 minutes.

Next one:

Find the next object in the following sequence

o, t, t, f, f, s, s, e, n, t, ...

Good luck=D

e

That I got that as soon as I looked at it possibly says something about how my brain works.

There's nowhere I can't reach.

Excellent. Next one:

A man entered a pub. He sat at the bar and started a talk with the bartender. After a few minutes bartender said he had three sons. "How old are they?" asked the man at the bar. "Product of their ages is 72." replied bartender. The man started thinking. "I need more information" he said. "The total of their ages equals the number on the building which is opposite to my bar." said bartender. The man left, saw the number on the building and came back to the bar. "I still need more information" he said to the bartender. "The youngest one LOVES ice cream" said bartender. "Now I know the answer" said the man and smiled.

Yes.. what is the answer?

This thing is sticky, and I don't like it. I don't appreciate it.

6, 6, and 2 yo?

Am I supposed to put how I thought about it?:

Prime factorization of 72: 2*2*2*3*3, so the three ages are combinations of the products of these. Take the possibilities, and add them:

18+2+2 = 22
6+6+2 = 14
9+4+2 = 15
12+3+2 = 17
8+3+3 = 14

If the building number across the street was 22, 17, or 15, the guy would be done, but he needed more info. So he learned there was a youngest: 6, 6, and 2.

I am a dolphin, do you want me on your body?

Can you explain how you get to the answer, either Shin or Lambert? You just moved right on to the next question without any explanation. Some of us aren't geniuses.

I was speaking idiomatically.

Originally Posted by Maico

Can you explain how you get to the answer, either Shin or Lambert? You just moved right on to the next question without any explanation. Some of us aren't geniuses.

Answer Method:

One
Two
Three
Four
Five
Six
Seven
Eight
Nine
Ten
Eleven

What kind of toxic man-thing is happening now?

Nice=) I have another one:

Fish breeder Peter bought three ponds: one with silver carps, one with rudds and wone with both of them silver carps and rudds. Th previous owner put wrong all the signs (saying which spieces are in a corresponding pond). Now Peter would like to put them back in a correct order, but he don't want to fish to much fishes. He came up with an idea how to do that fishing only one fish at all. How? =)

FELIPE NO

neat!

Spoiler:

Go fish one fish in the pond where the signs says "carps and rudds".

Assume you catch a rudd. You know all signs are wrong now, so the only option here is that there are only rudds in it. Place the sign rudd here.
Then replace the "rudd" sign with the "carp" sign. Finally replace the "carp" sign with the "carps and rudss" sign

Same logic if you get a carp out of it.

Next one:

Assume you're in front of two doors. One door leads to a treasure and the other one to instant death. The doors are guarded by twin brothers. One of the two brothers always speaks the truth and one of them always lies. Since they're identical twins you don't know which one is honest and which one a liar. Which question will you ask to know which door you should take? (to the treasure of course!)

What, you don't want my bikini-clad body?

"Hey, shorty, what door does your brother day is the one leading to death?"

And you walk into the that one.

Additional Spam:

Duh.:

Oh, method: Alright, so by asking one twin to give you the answer from the other you know it will always be wrong. Why? Either way the answer goes through the liar, thus you can count on it being the wrong one.

How ya doing, buddy?

This is a common warmth transfer question:

I'm making some tea and I have to add cold milk and sugar to it. So I boil the water and put it in my cup. But suddenly someone is calling me on the telephone (for approximately 10 minutes) and I don't want my cup of tea to be cold when I come back. What do I do?

1) poor the milk in it now
2) poor the milk in it after 10 minutes

If you know the answer, don't tell it too fast, let other people discuss first.

There's nowhere I can't reach.