Biology; Chemistry; Physics: Post your doubts here!

[pinkywinkypuffy]

mohdumar

Please Post some of your Special Notes on Physics... If you have any!

 

[passion hunter]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w12_qp_22.pdf......Q6 (b)..help

 

[KWIKIW]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w12_qp_22.pdf......Q6 (b)..help

First find the total charge per second using I=Q/t, the n divide that charge by the charge of an electron to find the number of electrons.

 

[passion hunter]

First find the total charge per second using I=Q/t, the n divide that charge by the charge of an electron to find the number of electrons.

could you please solve it for me?

 

[KWIKIW]

Can somebody explain how to find the resultant magnetic field in several different cases, such as two current carrying wires into the page which are closer to one another.

 

[Muaztsu]

how to use the C.R.O?

 

[KWIKIW]

Current means charge per second, therefore charge per second is 5.6 × 10–3 C.
Then divide that by the charge of an electron, 5.6 × 10–3 /1.6 × 10–19,
Answer will be 3.5×10^16.

 

[Zuhsid]

could you please solve it for me?

As the values given are for one of the particle emitted, therefore by using the formula; T=Q/I, you can find the time taken for one particle to travel to the screen...... Therefor, if u then divide "1" by the answer u get, u will get as to how many particle can reach in one second.... .. Hope it helps...

 

[Zuhsid]

Can somebody explain how to find the resultant magnetic field in several different cases, such as two current carrying wires into the page which are closer to one another.

u just need to know the two following v\basic...
https://markto1970b.thruhere.net.nz...current in a ships electrics_files/fig5-4.gif

 

[salma_69]

can someone plz help in this paper 1 physics question

A 100g mass is suspended from a spring next to a vertical metre rule. The top of the spring is
level with the 0.0cm mark. The bottom of the spring is level with the 27.2cm mark
The 100g mass is replaced with a 600g mass. The length of the spring is now 89.7cm. The
spring has not reached the limit of proportionality.
The 600g mass is replaced with a 200g mass. What is the length of the spring?

A 29.9cm
B 33.4cm
C 39.7cm
D 54.4cm

 

[Zuhsid]

can someone plz help in this paper 1 physics question

A 100g mass is suspended from a spring next to a vertical metre rule. The top of the spring is
level with the 0.0cm mark. The bottom of the spring is level with the 27.2cm mark
The 100g mass is replaced with a 600g mass. The length of the spring is now 89.7cm. The
spring has not reached the limit of proportionality.
The 600g mass is replaced with a 200g mass. What is the length of the spring?

A 29.9cm
B 33.4cm
C 39.7cm
D 54.4cm

According to me, it should be C....

 

[salma_69]

it's correct but can u tell me how??

 

[Zuhsid]

it's correct but can u tell me how??

You see, since we do not know the length of the spring when there is no load, so we are going to take length when 100g is attached to the spring as the initial point(like ASSUME that there is no load attached to the spring, and 100g is mass of the the spring, thus, its original length is 27.2cm)...... keeping this in mind, when u apply the 600g load.... and put the values into the formula "Load=K x extension", Load here would be 500g(subtract the original 100g), and extension would be 89.7-27.2.
So once u find the value of K(constant), u can find the extension such that the new load is 100g, but keep in mind that when u find the extension, add 27.2cm into it, as it was the initial length of the spring...
Hope it helps...

 

[TheStallion-Reborn]

what happens to the temperature of a gas if it's volume is decreased/increased?

 

[mohdumar]

mohdumar

Please Post some of your Special Notes on Physics... If you have any!

Im afraid they are not in electronic format!

 

[Zuhsid]

what happens to the temperature of a gas if it's volume is decreased/increased?

Temperature is directly proportional to volume, thus it increases/decreases with volume.....

 

[TheStallion-Reborn]

Temperature is directly proportional to volume, thus it increases/decreases with volume.....

thnku...and thus inversely proportional to pressure..right?

 

[Zuhsid]

thnku...and thus inversely proportional to pressure..right?

There are basically 3 formula, Temp is directly proportional to pressure, Temp is directly proportional to volume... and the third is that Pressure is inversely proportional to volume... Hope it helps..

 

[TheStallion-Reborn]

There are basically 3 formula, Temp is directly proportional to pressure, Temp is directly proportional to volume... and the third is that Pressure is inversely proportional to volume... Hope it helps..

dude...ur denying ur ownself. pressure is inversely proportional to volume. agreed. so that means if temperature is directly proportional to volume, it has to be inversely proportional to pressure. usama321 ur thoughts??

 

[passion hunter]

As the values given are for one of the particle emitted, therefore by using the formula; T=Q/I, you can find the time taken for one particle to travel to the screen...... Therefor, if u then divide "1" by the answer u get, u will get as to how many particle can reach in one second.... .. Hope it helps...

thank you man