Biology; Chemistry; Physics: Post your doubts here!

[Fate0]

do they last longer? isnt it cells run out fast?

Oh yeah mybad there. In series, they'll last longer

 

[Riding hood]

Hey could you please guide me how to draw normal in circular glass block?

 

[Fate0]

Hey could you please guide me how to draw normal in circular glass block?

Draw a tangent such that the angles formed with the circular glass block are equal. Place your protractor on that tangent and draw a 90 degree line.

 

[princess Anu]

make a tangent phele and then a normal to that tangent

 

[Riding hood]

Ohhh thankyouu! Jazak Allah!

 

[princess Anu]

when do we use newton meter in experiments? like to find force but isnt it just for spring extensions etc :/

 

[Maganius]

when do we use newton meter in experiments? like to find force but isnt it just for spring extensions etc :/

It's used for both purposes

 

[princess Anu]

Can somebody explain this:

• 
  
• : GIVE A REASON FOR MAKING THE LENGTH OF EACH NORMAL AT LEAST 6CM?
• Ans: This will help in measuring angles accurately as the radius of a protractor is normally 6cm.

 

[funky brat]

Oh yeah mybad there. In series, they'll last longer

They only ask about the Advantages in Parallel:
I) Less internal resistance so they don't heat up and more brighter
II) Last longer
III) If one blows, other keep working.

Cells in parallel last longer.

 

[ciesgetoveralready]

Can somebody tell me the experiments for the following :
1)Force on a current carrying wire
2)On a beam of charged particle in a magnetic field including the effect of reversing i) the current and ii) the direction of the field?

Thanking in advance

 

[Maganius]

when do we use newton meter in experiments? like to find force but isnt it just for spring extensions etc :/

We use it when we need to find force acting on a certain object.

 

[ciesgetoveralready]

Cells in parallel last longer.

I was wondering the same. Got me confused :/

 

[mohammad ahmed]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w13_qp_41.pdf

Q1 B i and ii
plzz helppp

 

[princess Anu]

We use it when we need to find force acting on a certain object.

but as in how? do we attach it to the object and then apply force? :S

 

[princess Anu]

I was wondering the same. Got me confused :/

bulbs are brighter in series or parallel?

 

[Maganius]

but as in how? do we attach it to the object and then apply force? :S

It's used for finding weight of the objects.
As Work=Force

 

[funky brat]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w13_qp_41.pdf

Q1 B i and ii
plzz helppp

It will travel down the table like a decreasing gradient and fall near the place mentioned floor. The distance from the table edge to the point where it lands is the horizontal distance.

 

[funky brat]

bulbs are brighter in series or parallel?

In parallel, because total resistance is less.

 

[ciesgetoveralready]

bulbs are brighter in series or parallel?

Parallel!

 

[princess Anu]

In parallel, because total resistance is less.

and why do cells last longer in parallel?