Biology; Chemistry; Physics: Post your doubts here!

[MuslimGirl]

Is it C?

yes i guess it is C

 

[SalmanPakRocks]

Yeah because lamp can't burn out because it is connected in Parallel, also that it can't be dimmer as the same amount of current flows. Furthermore there are more batteries so It will nauturally be lit for longer period of time.

 

[MuslimGirl]

Yeah because lamp can't burn out because it is connected in Parallel, also that it can't be dimmer as the same amount of current flows. Furthermore there are more batteries so It will nauturally be lit for longer period of time.

i totally agree with u

 

[Sweetsilly]

The fresh water ones have a contractile vacuole as in the fresh water the water outside the amoeba has high potential and that inside it has low potential so the water by osmosis has to go in amoeba but by putting more and more water in amoeba it will burst ! So to counteract this it has a contractile vacuole an adaption to its living place which helps to keep the excess water out by pressing against the water and not allowing it to enter it !
While those in sea water dont have it as sea water consists mostly of salts which makes the potential of water low and that inside amoeba high so water will leave amoeba by osmosis so the presence of a contractile vacuole reducing the amt of water inside amoeba is of no use,if its present it might not even allow Amoeba to have its normal water requirements !

Thanksssssssssss

 

[scouserlfc]

Thanksssssssssss

No problem ! ! !

 

[scouserlfc]

A lamp, designed to work at 1.5 V, is connected to a cell of electromotive force (e.m.f.) 1.5 V. The
lamp lights at normal brightness.
The lamp is now connected to four similar cells, each of e.m.f. 1.5 V, arranged in parallel.
What is the effect of connecting the extra cells in this way?
A The lamp burns out.
B The lamp is dimmer.
C The lamp produces light for a longer time.
D The lamp produces light for a shorter time.

Also another factor that helps the blb glow more in this set up is that in parallel connection the internal resistance of the cell is reduced as the total resistance is very low so the current is very high so the bulb lights for long and brightly !

 

[fatikhalid]

is IT C !

r su sure?

 

[SalmanPakRocks]

yes 100% sure.

 

[fatikhalid]

option C for ques 1 and A for question 6
correct me if i am wrong

no i also think its da same...tahnkyou!!

 

[fatikhalid]

yes 100% sure.

k thankyou!

 

[SalmanPakRocks]

np

 

[MuslimGirl]

no i also think its da same...tahnkyou!!

np

 

[scouserlfc]

can any 1 plz solve oct nov phy ppr 1 question 1 nd 6?? plzz

Which variant i am goin to solve Qp 12 since its pakistans \


1 C



6 The diameter and the length of a thin wire, approximately 1 m in length, are measured as
accurately as possible.
What are the best instruments to use?

......diameter/ length

A micrometer/ rule

B micrometer/ vernier calipers

C rule /tape

D vernier calipers/ rule

For this ill go with A !

 

[SalmanPakRocks]

It should be A or D.
The length will be measured with Ruler but diameter can be measured by vernier caliper or micrometer.

 

[scouserlfc]

Since its really thin so a micrometer might work but i think Vernier is correct so it shud be D !

 

[SalmanPakRocks]

But we also need accuracy. Either A or D

 

[abcde]

"as accurate as possible". The wording leads you to option A.

 

[fatikhalid]

Which variant i am goin to solve Qp 12 since its pakistans \


1 C



6 The diameter and the length of a thin wire, approximately 1 m in length, are measured as
accurately as possible.
What are the best instruments to use?

......diameter/ length

A micrometer/ rule

B micrometer/ vernier calipers

C rule /tape

D vernier calipers/ rule

For this ill go with A !

Thankyou!!!...

 

[fatikhalid]

thankyou evry 1 !!! i also think its wither A or D...

 

[SalmanPakRocks]

thankyou evry 1 !!! i also think its wither A or D...

its A conformed now.