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Physics, Chemistry and Biology: Post your doubts here!

Iridescent

Iridescent

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shazmina said:
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w03_qp_1.pdf could sum1 help me wid question no 3...nd btw y de answer A...TNXS
Click to expand...

Speed = distance/time. As the car starts to accelerate, the speed is less in the beginning and keeps on increasing as the car accelerated. As the distance between the poles is constant, the time taken will be greatest Between pole 1 and pole 2 because the speed willl be least between pole 1 and pole 2.
Hope you got it :)
 
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shazmina

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wo
Iridescent said:
Speed = distance/time. As the car starts to accelerate, the speed is less in the beginning and keeps on increasing as the car accelerated. As the distance between the poles is constant, the time taken will be greatest Between pole 1 and pole 2 because the speed willl be least between pole 1 and pole 2.
Hope you got it :)
Click to expand...
wooooooooow..Ahhmazing...tnxs a billion..:) i gt it
 
Iridescent

Iridescent

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shazmina said:
Cn u plz let me bt dis.... how is de thermal capacity linked with the time taken for heating... :)
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More thermal capacity means that it takes more energy to increase the temperature of the substance by 1K, compared to substance with less thermal capacity. As it takes more energy (heat), it will take more time to increase the temperature.
 
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shazmina

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Iridescent said:
More thermal capacity means that it takes more energy to increase the temperature of the substance by 1K, compared to substance with less thermal capacity. As it takes more energy (heat), it will take more time to increase the temperature.
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tnxs a billion :)
 
salma_69

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A radioactive isotope has a half-life of 6000 years.
How much time passes before the rate of emission from a sample of this isotope falls to 1/16 of its
original value?

A 6000 years
B 18000 years
C 24000 years
D 96000 years
can someone plz help me with this p1 physics question...:(
 
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shazmina

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salma_69 said:
A radioactive isotope has a half-life of 6000 years.
How much time passes before the rate of emission from a sample of this isotope falls to 1/16 of its
original value?

A 6000 years
B 18000 years
C 24000 years
D 96000 years
can someone plz help me with this p1 physics question...:(
Click to expand...

frst of all my i knw de answer plzz....:)
 
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