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Physics: Post your doubts here!

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meko ni ata a part, sikhado...
A part is that we just use the graph to find the corresponding value of the temp given ..
As in they've given us 22.5 so the corresponding value is 1600 ohm
The reading in the voltmeter could be found by .. First finding the current un the circuit, that is 9/2000 then btw u got 2000 by adding the resistances present in the circuit ...
Now u'll get your current as 4.5*10^-3 .. Since u gotta find the voltage .. Multiply the current with the resistances of the resistors inside the A B loop ... That will give u 800
And the final answer would be 3.6 ..
Hope I helped :)
 
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Aoa,
Guys anyone please have some tips for solving physics paper 2?
Cuz I just can't finish the papers on time ...
Pulse share
Thank u :)
 
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for Y=92 -57
for Z =235- 148 - 3 cux 3 neutrons are there

well not sure about the ii) part
when a reaction occurs then energy is realease and due to release of energy mass can be lost too so thats y the mass is nt equal :/

But the mass is 236 on both sides. I'm so confused.
 
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We can answer this by thinking about the energy which is carried away by the particles (alpha or beta) and electromagnetic radiation (gamma) produced in the decay.Albert Einstein realised that we can think of energy as having mass. So if the mass of the nucleus decreases we must look around and find the energy which is carrying away this mass.The greater the apparent loss in mass the greater the amount of energy which is escaping.
To sum up we talk about "mass-energy" . In any closed system the total amount of mass-energy is conserved. If the mass goes down energy goes up and vice versa, but the total is constant
 
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We can answer this by thinking about the energy which is carried away by the particles (alpha or beta) and electromagnetic radiation (gamma) produced in the decay.Albert Einstein realised that we can think of energy as having mass. So if the mass of the nucleus decreases we must look around and find the energy which is carrying away this mass.The greater the apparent loss in mass the greater the amount of energy which is escaping.
To sum up we talk about "mass-energy" . In any closed system the total amount of mass-energy is conserved. If the mass goes down energy goes up and vice versa, but the total is constant

You are quoting this from the physics as level course book. I don't understand why the question is saying the sum of the masses is not equal when if you compare both sides, the masses seem to be equal to me.
 
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