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If I hit a 100g bottle with a speed of 10m/s using a 10kgs stick, why would the bottle go further than If I hit it at the same speed using a 5kg stick?
 
You mean X and Y plates? Used to deflect the electron beam I think
Nope, it says X shift and Y shift.

Wait, I think you use them to provide the X and Y plates voltages... :/
I meant stating facts that you know lool, but hey asking questions might work as well.
I can use it any way I want. :D
Yeah.
X plates deflect the e-beam horizontally and Y plates deflect vertically.

Yes, got that.
 
If I hit a 100g bottle with a speed of 10m/s using a 10kgs stick, why would the bottle go further than If I hit it at the same speed using a 5kg stick?

The force created by the 10kg stick is greater due to greater mass and F=ma?
 
If I hit a 100g bottle with a speed of 10m/s using a 10kgs stick, why would the bottle go further than If I hit it at the same speed using a 5kg stick?

First off, you'll probably destroy the bottle with that stick. :P

I think it has to do with the mass. F=ma.
 
The force created by the 10kg stick is greater due to greater mass and F=ma?
indeed...using the laws of momentum, the higher the mass the higher the force.
This is why its good to be fast rather than strong and bulky as you can improvise to make your fists heavier(gloves or something) whilst having a greater speed which equals a greater momentum which equals stronger striking power...therefore quicker people are more dangerous than strong people.
 
Time to start some Maths revision :danish If any of you have any Maths questions (preferably, differentiation/ integration - trigonometry) i'd appreciate it of you post it here.
 
The critical angle is the angle of incidence in the optically denser medium for which the refracted ray is 90 degrees.

Yes! :108:
 
do the guys who are good at physics...generally, why is friction the centripetal force when a car goes around a roundabout...I don't understand this...Makes sense for tension or gravity but not friction
 
do the guys who are good at physics...generally, why is friction the centripetal force when a car goes around a roundabout...I don't understand this...Makes sense for tension or gravity but not friction

I did absolutely no revision for Physics, had 2 exams that day :facepalm: Have you done the June 2012 Paper?
 
do the guys who are good at physics...generally, why is friction the centripetal force when a car goes around a roundabout...I don't understand this...Makes sense for tension or gravity but not friction

The centripetal force comes from friction between the car tires and the road. Friction causes the car to maintain its circular motion. The car would maintain forward motion instead of circular motion if the frictional force wasn't present.1

Footnote:-
1) For example, the car is hard to turn on ice because the frictional force is less.
 
The centripetal force comes from friction between the car tires and the road. Friction causes the car to maintain its circular motion. The car would maintain forward motion instead of circular motion if the frictional force wasn't present.1

Footnote:-
1) For example, the car is hard to turn on ice because the frictional force is less.
getting schooled by a 14yo lol...Cheers and this is what i was asking mamoon
 
I just remembered this biology question - why do humans have a high and constant respiration rate, and why does the respiration rate of plants vary widely?
 
Found a good way to revise, do a question then come on PP for 2/3 mins, then do a question.
 
Honestly... I'd murder Haz, Ikball and even Afridi96 for this. :97:
Junaid-Khan-and-Esteban-Granero-separated-at-birth-Funny-Picture87833272_201311122258.jpg

something different lol..I've found a way where both u and 083 can share
 
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I just remembered this biology question - why do humans have a high and constant respiration rate, and why does the respiration rate of plants vary widely?
Somebody please answer this. :facepalm:

I think I messed up. :(
 
Because plants respire at night mostly not during the day I believe

The respiration rate of plants is constant throughout the day, whereas it varies for humans because it depends on our activities and how much energy we need.

So your answer doesn't fit. :/
 
The respiration rate of plants is constant throughout the day, whereas it varies for humans because it depends on our activities and how much energy we need.

So your answer doesn't fit. :/

No- don't plants photosynthesise during the day and respire at night? In the day they give out oxygen, in the night they take on oxygen for respiration.
 
The respiration rate of plants is constant throughout the day, whereas it varies for humans because it depends on our activities and how much energy we need.

So your answer doesn't fit. :/

Your answer contradicts the question :s
 
No- don't plants photosynthesise during the day and respire at night? In the day they give out oxygen, in the night they take on oxygen for respiration.

The photosynthesize during the day, but respire at night and during the day. The rate of photosynthesis overtakes the rate of respiration during the day, which is why they give out oxygen.

Do you have biology?
 
My answer is correct- just verified it via Google and all sites say that plant respiration happens more during the night because during the day they're photosynthesisising.
 
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The photosynthesize during the day, but respire at night and during the day. The rate of photosynthesis overtakes the rate of respiration during the day, which is why they give out oxygen.

Do you have biology?

I had biology in O levels.
Rate of respiration overtakes rate of photosynthesis at night. :D
 
My answer is correct- just verified it via Google and most sites say that plant respiration happens more during the night because during the day they're photosynthesisising.
I never said you were wrong, but plants respire the same throughout the day... At least that's what all my books say.

The only thing that changes is the rate of photosynthesis, which affects the taking in and giving out of oxygen.
 
I wanted to log in a while before, but all the physics talk gave me a headache ..

Please bacho, ab tou koi aur baat karlo..
 
I never said you were wrong, but plants respire the same throughout the day... At least that's what all my books say.

The only thing that changes is the rate of photosynthesis, which affects the taking in and giving out of oxygen.

Exactly!
At night more oxygen is taken in for respiration!
 
Yes, but ONLY because the rate of photosynthesis falls. The rate of respiration is still the same.
I dunno whether its right or not but in humans, we need a constant environment-ion, water, sugar content due to homeostasis but in plants it varies..at times there's more Glucose levels than CO2 levels. As a result of this at certain points there will be less...
 
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