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I hate my life. I did that past paper, i think it was 2009 O/N. but i didnt check the answer. And that barometer was just dumb of me.
Hi, I want to ask u wat u chose for the pendulum one...I chose strain energyI chose 13 A for the fuse one, but I'm not sure whether it's right or not...
for the relay: it was a small current used to draw a larger current for the motor
Yea, for the water evaporation, highest energy particles leave and average speed of molecules decreases
For the hot water one, I don't remember the options, but I think i chose B for that!
It actually depends on the grade thresholds which change every year according to how well all the candidates do! So maybe if people don't do well in this exam, to get an A you might just need to get a 30 or something, but it all depends!
in which they say GP energy is converted into ________+KE +energy loses
i think that was internal (heat) thats when i chose for that one i think
copper side the most and wood least , whats with ur picture
I think u r right cauz friction between string and bob u mean?
Well....humans can only detect frequencies of 20Hz to 20KHz.
No, you were right. The hottest point was the wood one closest to the flame because wood is a bad conductor of heat. The question said "After 1 minute, which is the hottest and coldest area?" or something. So after one minute the copper would have cooled down already but not the wood. Heck, the wood may have even caught fire and become hot
Which would be hotter, the wood that's on fire, or the copper that's taking heat FROM the fire? *If* the wood caught fire, hypothetically, then the copper could only take heat from it, and since heat goes from a hot material to a colder (relatively) one the copper *should* be colder than the wood, or the same -- it cannot become any hotter than the wood since the wood would then receive heat from the copper, no matter how bad a conductor it is
u guys did which variant??Well....humans can only detect frequencies of 20Hz to 20KHz.
No, you were right. The hottest point was the wood one closest to the flame because wood is a bad conductor of heat. The question said "After 1 minute, which is the hottest and coldest area?" or something. So after one minute the copper would have cooled down already but not the wood. Heck, the wood may have even caught fire and become hot
Which would be hotter, the wood that's on fire, or the copper that's taking heat FROM the fire? *If* the wood caught fire, hypothetically, then the copper could only take heat from it, and since heat goes from a hot material to a colder (relatively) one the copper *should* be colder than the wood, or the same -- it cannot become any hotter than the wood since the wood would then receive heat from the copper, no matter how bad a conductor it is
I think you are absolutely correct, b/c the heat absorbed by copper gets conducted forward in the copper, however, th hea provided to wood doesnt get conducted, hence accumulates in that region causing it to be the hottest.
Well....humans can only detect frequencies of 20Hz to 20KHz.
No, you were right. The hottest point was the wood one closest to the flame because wood is a bad conductor of heat. The question said "After 1 minute, which is the hottest and coldest area?" or something. So after one minute the copper would have cooled down already but not the wood. Heck, the wood may have even caught fire and become hot
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