Physics, Chemistry and Biology: Post your doubts here!

[Ameena Eesa]

whats osmoregulation, pls rep quick

Osmoregulation is the active regulation of the osmotic pressure of an organism's fluids to maintain the homeostasis of the organism's water content; that is, it keeps the organism's fluids from becoming too diluted or too concentrated. Osmotic pressure is a measure of the tendency of water to move into one solution from another by osmosis. The higher the osmotic pressure of a solution, the more water tends to move into it. Pressure must be exerted on the hypertonic side of a selectively permeable membrane to prevent diffusion of water by osmosis from the side containing pure water.

 

[Thought blocker]

Osmoregulation is the active regulation of the osmotic pressure of an organism's fluids to maintain the homeostasis of the organism's water content; that is, it keeps the organism's fluids from becoming too diluted or too concentrated. Osmotic pressure is a measure of the tendency of water to move into one solution from another by osmosis. The higher the osmotic pressure of a solution, the more water tends to move into it. Pressure must be exerted on the hypertonic side of a selectively permeable membrane to prevent diffusion of water by osmosis from the side containing pure water.

Oye, Wikipedia hai kya tu ?

 

[Ameena Eesa]

I want Solution to this Part... in detail for three marks

take a a few mm of Aluminium metal , on one side of it keep the radioactive source, and on the other side a radiation detector. if radiation is detected, it means gamma rays are present bcoz alpha and beta wouldnt be able to penetrate it.

 

[Ameena Eesa]

Oye, Wikipedia hai kya tu ?

Galat kiya?

 

[Thought blocker]

Galat kiya?

Nai na, acha hi kiya

 

[Ameena Eesa]

Whats dependant variable, independant variable, controlled variable......? any other variables so pls tellllllllll.......

 

[Ameena Eesa]

what variable are found in this......?? how is temp indep var. ?

 

[Ameena Eesa]

Awesome12

 

[Mimick]

Link?

i need help in may june 2013 variant 63.in qstn no. 3 and 1 (ii) in the graph ....following is the link..i am unable to draw the graph!

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Biology (0610)/0610_s12_qp_63.pdf...

tomorrow i have exam pls help!

 

[Mimick]

View attachment 41316


what variable are found in this......?? how is temp indep var. ?

to get the reliable results!

 

[Ameena Eesa]

to get the reliable results!

??????

 

[Awesome12]

Whats dependant variable, independant variable, controlled variable......? any other variables so pls tellllllllll.......

Dependant variables are the variables we are testing and that are not changing in intervals (well it can but sometimes)
Independant variables are the variables that are not effected. For example, time. Time is usually measured in intervals
Controlled variable is the one which we are keeping constant. For example, while measuring resistance in a wire, we keep the temp. constant

View attachment 41316


what variable are found in this......?? how is temp indep var. ?

We are increasing the temp in intervals

 

[Ameena Eesa]

Dependant variables are the variables we are testing and that are not changing in intervals (well it can but sometimes)
Independant variables are the variables that are not effected. For example, time. Time is usually measured in intervals
Controlled variable is the one which we are keeping constant. For example, while measuring resistance in a wire, we keep the temp. constant


We are increasing the temp in intervals

so in the above experiment temp is independant var. ? bcoz its in ms........

 

[Ameena Eesa]

help with thissssssssssss

 

[slisjunknown]

I have a problem October November 2007 p6 question no. 1 c)
Please tell me the answer quickly cuz I've got my exams tomorrow

 

[Akshajistari]

I have a problem October November 2007 p6 question no. 1 c)
Please tell me the answer quickly cuz I've got my exams tomorrow

There IS no question 1 c)

 

[Akshajistari]

with thissssssssssss

You circle any cell that has two chromosomes at the edges for (i). For (ii) it is mitosis as this is not a process involved in the creation of gametes(in that case it would be meiosis).

 

[shoaib672002]

Whats Pyrogallol

 

[slisjunknown]

There IS no question 1 c)

Sorry I 4got to mention...it's Physics

 

[Prateek bhagchandani]

i have a problem with the linear expansivity of solids, plzz explain it and 1 one problem: explain specific latent heat!! plz rply as fast as possible.