Physics, Chemistry and Biology: Post your doubts here!

[princess sofia]

but they are mixed!

evn if they r , due to heating all of the water ll b evaporated leaving behind only crystals

 

[OneOfAKind]

Please help me with this physics paper 6 question (O/N 2007)
Thanks in advance!

 

[Ameena Eesa]

Ameena Eesa for the rusting question you asked , the water level rise because the oxygen which is the second major reason and vital substance taking part in the rusting process is used up in the space where it was present at the begining of the reaction , so water took its place , shown by the increase in its level .

Yes there is a rule for both ionic and covalent compounds when they are lowered in water , ionic do dissolve because in the process of dissolving there must be a compound which is strong enough to break the bonds present in water , and in ionic because of the positive and negative charges in the compound and the also the opposite charges in water ( H AND OH) that they do attract and accomplish the dissolving process.

Because covalent bonds lack of this properties and also because they are of weak attraction forces that they donnot have the power to break the bonds of water thus fails to dissolve in water .
but again covalent compounds doesnt dissolve in a covalent coumpound

Check more about polarity and nonpolarity in water .

hope to have answered your questions

Tysm )))))))))

 

[Ameena Eesa]

Can you suggest any improvements for the experiments for measuring specific latent heat and capacity?

 

[DarkEclipse]

Can you suggest any improvements for the experiments for measuring specific latent heat and capacity?

That depends on what equipment you used to carry out the experiments the first time.

 

[Ameena Eesa]

That depends on what equipment you used to carry out the experiments the first time.

Something about minimizing heat losses, they say. Lagging and all........?

 

[Awesome12]

Please help me with this physics paper 6 question (O/N 2007)
Thanks in advance!

Can you suggest any improvements for the experiments for measuring specific latent heat and capacity?

Name the apparatus that you use for the experiment and then i can help you

 

[Ameena Eesa]

View attachment 40914


Name the apparatus that you use for the experiment and then i can help you

Crushed ice in a funnel, in which in a heater. Water drips from the funnel into a beaker.

 

[Awesome12]

Crushed ice in a funnel, in which in a heater. Water drips from the funnel into a beaker.

You must make sure that
1/3 of thermometer must be immersed
Bulb of thermometer must touch the ice
Ice must be crushed to increase surface area to volume ratio
Make sure stop clock is near the thermometer to ease in checking them both simultaneously
Tap needles of voltmeter and ammeter to reduce friction
Use voltmeter and ammeter that show a large deflection
Make sure to conduct experiment at room temp, so that external temp does not cause inaccuracy in readings

 

[Ameena Eesa]

You must make sure that
1/3 of thermometer must be immersed
Bulb of thermometer must touch the ice
Ice must be crushed to increase surface area to volume ratio
Make sure stop clock is near the thermometer to ease in checking them both simultaneously
Tap needles of voltmeter and ammeter to reduce friction
Use voltmeter and ammeter that show a large deflection
Make sure to conduct experiment at room temp, so that external temp does not cause inaccuracy in readings

Excellent!

 

[princess sofia]

cn any1 plz help me in Q1 part c
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w06_qp_6.pdf

 

[Karim Nabil]

cn any1 plz help me in Q1 part c
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w06_qp_6.pdf

assume that total volume of rods is not lesser than 7cm^3(b'coz rods are arranged close together with small air gaps b/w them)
e.g.: 7.83-0.8=7cm^3
then... calculate density using formulae provided

 

[Incartyyy]

i really want someone to check my work..please i'll be really thankful..
the pic quality might disturb..

 

[princess sofia]

cn any1 plz make a diagram dat how is set square used to c if something is at equal height / horizontal

 

[princess sofia]

i really want someone to check my work..please i'll be really thankful..
the pic quality might disturb..

r they frm any paper ?

 

[Awesome12]

How to identify zero error of vernier calipers? Notes here

 

[Stephanie Hyacinth]

i really want someone to check my work..please i'll be really thankful..
the pic quality might disturb..

when you measured the seedlings, did you include the roots?

 

[Stephanie Hyacinth]

Please help me with this physics paper 6 question (O/N 2007)
Thanks in advance!

use of a set square or protractor, place the set square side by side with the pin and make sure they are aligned or with the protractor, make sure the angle between the pin and the paper is 90

 

[qazmed]

use of a set square or protractor, place the set square side by side with the pin and make sure they are aligned or with the protractor, make sure the angle between the pin and the paper is 90

guys how to draw a histogram in bio p6
it gives eg 50-59 as the class width shud i do it 50-60 or wat??

 

[Stephanie Hyacinth]

guys how to draw a histogram in bio p6
it gives eg 50-59 as the class width shud i do it 50-60 or wat??

no take the figures directly so it should be 50-59 and it should touch