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papers.xtremepapers.com/CIE/Cambridge International O Level/Chemistry (5070)/5070_s11_qp_22.pdf. qu A6(b) please helpppppp please
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When a cyclist cycles uphill the energy conversion is from the chemical energy in his body to Gravitational Potential Energy due to upper position on the Hill top. But as s/he moves uphill , some chemical energy is also converted to kinetic energy. But it is not mentioned in the Mark Scheme. Could u plz explain?
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w05_qp_2.pdf
question11 part b (ii) part 2
A bistable circuit is a sort of electronic switch: it may use fancy logic, but ultimately it is just a switch that has two 'states', like on and off, or bright and dim. And there is a way that the circuit can be set to one 'state' or the other. So maybe when it is dark in the room, the switch is set make the television screen dimmer, and when it is light, the screen gets brighter. Or a night-light comes on when it is dark in the room. Some condition has to change to make anything happen. Maybe a person throws a switch. A light-switch is a simple bistable circuit.whats the diference between bistable and astable circuit?
Plz ask specific questions here: [email protected]Can anybody help please? Resources n tips needed on the following subjects:EnglishMathsPhysicsChemistryComputer StudiesUrduO-Levels student goin to appear in May/June 2K14May Allah bless u n grant us success in this world n the hereafter
Could u plz give me the question papers before 2000 ? Thank u so much.Re: Biology,Chemistry & Physics Help Available Here !
sorry about mixing it up.... i was in a hurry.... and yes. i did get but i was a little stuck on a 87 past paper question.... so no biggie. =) thanx btw.
Can anybody send me the May 2013 Cambridge O Level QP AND MS for Physics, Chemistry, Maths D, Add Maths and Biology? IT'S URGENT!!!!!!!!!!!!!!!!Re: Biology,Chemistry & Physics Help Available Here !
Wassalam!
Topic made sticky.
Wasnt this speed of the neutrino recorded wrong due to some loose wire connections? What i heard later was that, it has been proven that these neutrinos are fast- but still slower than the speed of light. Do correct me if i am mistaken!Studies are still taking place – there has been this ‘Faster-than-light neutrino anomaly’ discovery, recently – this particular neutrino travels faster than the speed of light – BUT analysis are still taking place – we can’t hands down say anything about it.
Also, is that even in our syllabus?
Wasnt this speed of the neutrino recorded wrong due to some loose wire connections? What i heard later was that, it has been proven that these neutrinos are fast- but still slower than the speed of light. Do correct me if i am mistaken!Studies are still taking place – there has been this ‘Faster-than-light neutrino anomaly’ discovery, recently – this particular neutrino travels faster than the speed of light – BUT analysis are still taking place – we can’t hands down say anything about it.
Also, is that even in our syllabus?
Wasnt this speed of the neutrino recorded wrong due to some loose wire connections? What i heard later was that, it has been proven that these neutrinos are fast- but still slower than the speed of light. Do correct me if i am mistaken!Studies are still taking place – there has been this ‘Faster-than-light neutrino anomaly’ discovery, recently – this particular neutrino travels faster than the speed of light – BUT analysis are still taking place – we can’t hands down say anything about it.
Also, is that even in our syllabus?
Hey guys. Any one know where i can learn about anion reactivity series? I tried using Google but i couldn't find anything useful. Help me please?! Thanks a ton!
Sahana
As far as I know there is no such reactivity series. You can only remember the anions in order of increasing ease of their discharge at the anode during electrolysis namely, Sulfate, Nitrate, Chloride, Bromide, Iodide, Hydroxide. If I can find any mnemonic or memory aid I'll let u know later.Hey guys. Any one know where i can learn about anion reactivity series? I tried using Google but i couldn't find anything useful. Help me please?! Thanks a ton!
Sahana
Kinetic Energy is the energy related to Movement.
Gravitational Potential Energy is related to the position of the object, it's height from the ground.
As the Cyclist moves up the hill, the stored Chemical Energy in his body, is used to cycle and move uphill. As he moves up, we say the Chemical Energy is converted into Gravitational Potential Energy.
But, in O-Level we deal with the relation between Kinetic and G.P Energy, when we talk about moving upwards.
Whenever we talk about an object, moving up to a certain height. The gravitational potential energy will be maximum at the top height, and it will be zero, when the object is at the ground. Likewise, the Kinetic Energy will be zero at its maximum height, and maximum, just before the object hits the ground.
As an object moves upwards, we say its Kinetic Energy is being converted into Gravitational Potential Energy.
As the object descends to the ground, its Gravitational Potential Energy is being converted into Kinetic Energy, and the object Accelerates.
So, when the Cyclist is moving up the hill, his Kinetic Energy is being converted into Gravitational Potential Energy as he elevates from the ground. No Chemical Energy is converted to Kinetic. Hope you get my point.
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