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[deleted]

Dr. D, I have a problem.. 😕 I saw this 97-dirham shirt in a dept. store and I wanted to buy it, but I had no cash at that time. So I borrowed 50 each from my 2 friends who was with me- now I have 100. I bought the shirt and my change was 3. I gave my friends 1 dirham each so now I owe them just 49 each, while I still have the remaining 1 dirham. Now comes the problem.. I owe my friends 98 dirhams (49+49), while I still have the remaining 1 dirham, that makes it 99 dirhams in all (I owe them 100). Where did the 1 dirham go? 😕

This question was answered before. Sorry.

There is no extra/missing dirham, you have a shirt buddy!

pinoy1

oh well.. 😁

Palkid7

Dr. D, I've got a good one !!! I used to be addicted to Coffee really bad, and now all that traffic, stress is making me go back to the old habbit !! any suggestion to prevent me falling into the addiction loop again !!! 😢

When you say addicted, how many cups of coffee a day?

an average of a mug every 1-2 hours !!!

[deleted]

Dr. D, I've got a good one !!! I used to be addicted to Coffee really bad, and now all that traffic, stress is making me go back to the old habbit !! any suggestion to prevent me falling into the addiction loop again !!! 😢

When you say addicted, how many cups of coffee a day?

an average of a mug every 1-2 hours !!!

So assuming you get 6 hours sleep (if you drink that much coffee), you have between 7 to 9 cups of coffee a day.

That's a lot, but not too excessive.

I would suggest you chew gum or smoke.

Palkid7

So assuming you get 6 hours sleep (if you drink that much coffee), you have between 7 to 9 cups of coffee a day.

That's a lot, but not too excessive.

I would suggest you chew gum or smoke.

Smoking !!! Dr. D !! it is worse than coffee ma8 !!! Gum, not a big fan of it !!

[deleted]

So assuming you get 6 hours sleep (if you drink that much coffee), you have between 7 to 9 cups of coffee a day.

That's a lot, but not too excessive.

I would suggest you chew gum or smoke.

Smoking !!! Dr. D !! it is worse than coffee ma8 !!! Gum, not a big fan of it !!

Oh right, well, chew gum then 🙂

Palkid7

Ok DR D. is it true that 1=2 ???
here is how ?!?!

X=Y

Multiply both sides by X:

X2 = XY

Subtract Y2 on both sides:

X2 - Y2 = XY - Y2

By factoring:

(X+Y) (X-Y) = Y(X-Y)

Multiplying both sides by 1 / (X-Y):

X+Y = Y

Let: X=1 and Y=1

1+ 1 = 1

Therefore:

2 = 1 ------ Not equal!!!!! yet it is true ?!!? how come !!??! 😈 😈

[deleted]

Ok DR D. is it true that 1=2 ??? here is how ?!?! 2 = 1 ------ Not equal!!!!! yet it is true ?!!? how come !!??! 😈 😈

It's just bad math.

Palkid7

Come on Dr. D is that the best u can say !?!!? bad math ?!!? 😂 😂 😂 😂
u r the science man !!! explain why it is bad ?!!?

[deleted]

Come on Dr. D is that the best u can say !?!!? bad math ?!!? 😂 😂 😂 😂 u r the science man !!! explain why it is bad ?!!?

I would but I'm not in the office today. I'm at home with a cold.

Math questions are kind of boring and uninteresting, I prefer physics questions and the like.

Palkid7

Ok I have a physics question,
What's the loss factor of human flesh ?!?! i spent like a year looking for an answer and now working on a research to find it !!! if u have an answer u'll make my day !! 😂

[deleted]

Ok I have a physics question, What's the loss factor of human flesh ?!?! i spent like a year looking for an answer and now working on a research to find it !!! if u have an answer u'll make my day !! 😂

LOL!

Nosferatu

Ok DR D. is it true that 1=2 ??? here is how ?!?!

X=Y

Multiply both sides by X:

X2 = XY

Subtract Y2 on both sides:

X2 - Y2 = XY - Y2

By factoring:

(X+Y) (X-Y) = Y(X-Y)

Multiplying both sides by 1 / (X-Y):

X+Y = Y

Let: X=1 and Y=1

1+ 1 = 1

Therefore:

2 = 1 ------ Not equal!!!!! yet it is true ?!!? how come !!??! 😈 😈

since X = Y, X - Y = 0. So you cannot multiply by 1 / (X-Y)

Do you get what i mean?

Palkid7

and we have a winner !!
I know that Dude !! I am an engineer !! so math is my salt in life !!! 😎
Dr. D !! Shame on u not knowing this !!! 😂 😂

[deleted]

and we have a winner !! I know that Dude !! I am an engineer !! so math is my salt in life !!! 😎 Dr. D !! Shame on u not knowing this !!! 😂 😂

You win a mickey mouse badge.

I'm sorry to hear you're an engineer, hopefully one day they will find a cure.

Nosferatu

i have a physix question... its something i have thought about a lot... one of my cousins asked me this one and i cudnt think of an answer...

consider a fly and a train coming from opposite directions..... they collide with each other.... after the collision the fly sticks onto the train and moves in the same direction as that of the train.... but at the point of contact, the direction of the fly's motion is reversed.... so that means its velocity has to be reduced to zero and then it shud increase in the opposite direction.... so my question is if at the time of contact the velocity of the fly is zero, shouldn't the velocity of the train also be zero? after all they r in contact with each other....

Palkid7

that's simple, the energy of movement transformed to the energy of collision !! therefore no need for the train velocity to be reduced to zero unless the mases are equal !!! then u will notice it !!! 😂 😂

[deleted]

that's simple, the energy of movement transformed to the energy of collision !! therefore no need for the train velocity to be reduced to zero unless the mases are equal !!! then u will notice it !!! 😂 😂

This is the correct answer.

The velocity of the train would be decreased every so slightly, but barely measurable to a significant place.

Nosferatu

that would be correct if i am talking abt the momentum conservation thing... but think abt it this way.... do u agree thgat the velocity of the fly has to become zero before its direction of motion can be reversed? if u dont think so then no need to answer... but in case u do, then think abt it again... at the point and time of contact, the velocity of the fly is zero.... suppose two bodies are in contact and the velocity of one of them is zero... then it follows that the velocity of the other should also be zero, if only for a very small onterval of time.... so if the velocity of the fly is zero then the train should also be at a standstill...

[deleted]

that would be correct if i am talking abt the momentum conservation thing... but think abt it this way.... do u agree thgat the velocity of the fly has to become zero before its direction of motion can be reversed? if u dont think so then no need to answer... but in case u do, then think abt it again... at the point and time of contact, the velocity of the fly is zero.... suppose two bodies are in contact and the velocity of one of them is zero... then it follows that the velocity of the other should also be zero, if only for a very small onterval of time.... so if the velocity of the fly is zero then the train should also be at a standstill...

On a time verses velocity graph it would indeed pass through the zero point at some stage, but only for an infitismally small amount of time... an instant.

A similar different scenario could be a wheel on a truck travelling down SZR. The truck is doing 90 k (in the far left lane) and each one of its 16 wheels is spinning at 90k an hour. What speed is the dead centre of the wheel spinning? (Assume the wheels are 21" in diameter).

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