Physics, Chemistry and Biology: Post your doubts here!

[shazmina]

wait...duznt it ask abt the slowest! sorry i dont get it either!

frnd u cn explain me again..it sys WHICH TYME IS DE GREATEST..!!!!!!!!!!

 

[Al-Anoud]

frnd u cn explain me again..it sys WHICH TYME IS DE GREATEST..!!!!!!!!!!

i have said tht previously....SCROLL UP FRIEND!

 

[Iridescent]

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

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

 

[shazmina]

wo

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

wooooooooow..Ahhmazing...tnxs a billion.. i gt it

 

[Iridescent]

wo
wooooooooow..Ahhmazing...tnxs a billion.. i gt it

You're welcome Shazmina

 

[shazmina]

You're welcome Shazmina

Cn u plz let me bt dis.... how is de thermal capacity linked with the time taken for heating...

 

[Gehad Mohamed]

Cn u plz let me bt dis.... how is de thermal capacity linked with the time taken for heating...

high thermal capacity object takes alot of time to heat up

 

[Iridescent]

Cn u plz let me bt dis.... how is de thermal capacity linked with the time taken for heating...

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.

 

[Gehad Mohamed]

Why do we use an a.c when transporting for long distance > q 35 http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w10_qp_12.pdf

 

[shazmina]

high thermal capacity object takes alot of time to heat up

tnxs a billion

 

[shazmina]

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.

tnxs a billion

 

[Gehad Mohamed]

tnxs a billion

Welcome

 

[Iridescent]

Why do we use an a.c when transporting for long distance > q 35 http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w10_qp_12.pdf

Because a.c can be stepped down for supplying to houses and factories at the required voltage while d.c cannot be stepped down.

 

[Iridescent]

tnxs a billion

You're welcome

 

[salma_69]

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...

 

[omaaaar]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s05_qp_1.pdf
I would like to know the name of the component in Q32 of the paper in the above link which has an arrow on the resistor.option (B)

 

[shazmina]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w05_qp_1.pdf could sum1 let me knw y is de answer A fr question no 31...plzzz

 

[shazmina]

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...

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

 

[shazmina]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s05_qp_1.pdf
I would like to know the name of the component in Q32 of the paper in the above link which has an arrow on the resistor.option (B)

yes its actually de anothr alternative frm of a variable resistor....hope u gt it

 

[salma_69]

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

it's C...