Biology; Chemistry; Physics: Post your doubts here!

[sameersuleman]

Guys what to do when these generic questions come in BIO atp:
Extend the experiment
Improve accuracy
Improve reliability

for the 2nd and 3rd.... repeat exp. and take avg.. for accuracy look straight to avoid parallex error.... never seen the first one though

 

[princess Anu]

Q Where do we exactly show eye to avoid parallax errors
in physics ATP ?

 

[asadalam]

Q Where do we exactly show eye to avoid parallax errors
in physics ATP ?

Perpendicular to the thermometer or meter rule.

 

[princess Anu]

you mean if its an oscillating pendulum we should draw eye on the diagram 90 degree to the pendulum or on the string ?

 

[princess Anu]

Describe experiment for reflection and refraction of sound waves?

 

[princess Anu]

Guys what to do when these generic questions come in BIO atp:
Extend the experiment
Improve accuracy
Improve reliability

to extend the investigation we can carry out the experiment with different species of the organism , at different locations , at different times, using greater number of samples etc

 

[exploded diper]

This question....
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w03_qp_4.pdf

 

[exploded diper]

Awesome also give ur points for extending an experiment.........

 

[Awesome12]

Awesome also give ur points for extending a graph.......

Kera graph? The one you asked for in the convo?

 

[asadalam]

Q3.b)
Why do we have to reverse connections in box?

 

[Awesome12]

Q3.b)
Why do we have to reverse connections in box?

A diode will only conduct electricity in one cycle; biasing, and will not conduct in the other way. We do not know what has been connected to the circiut. If it is a diode, and the bulb does not glow, then it means there is reverse biasing. Thus if we reverse the connections, biasing will ocuur and the bulb will glow

 

[asadalam]

A diode will only conduct electricity in one cycle; biasing, and will not conduct in the other way. We do not know what has been connected to the circiut. If it is a diode, and the bulb does not glow, then it means there is reverse biasing. Thus if we reverse the connections, biasing will ocuur and the bulb will glow

But it asks the same question in the next part,of what we will see if a diode is inside.Isnt it the same thing?Why are we checking for diode first?

 

[princess Anu]

a curve of best fit , can it be a best fit straight line ?

 

[Awesome12]

But it asks the same question in the next part,of what we will see if a diode is inside.Isnt it the same thing?Why are we checking for diode first?

That is the observation. I just explained the way of testing, by mentioning the result ot you

 

[asadalam]

That is the observation. I just explained the way of testing, by mentioning the result ot you

I dont get it.Why are we checking for diode when it asks us for the next procedure?

 

[asadalam]

Q1

 

[Uchiha-Sasuke]

cool eyes.....i have seen many ppl having those eyes..they r just absolutely amazing.....

those are sharingan eyes .. do you even watch anime ?

a curve of best fit , can it be a best fit straight line ?

you're kidding right ? no.

Q1

1.Coil wire around ruler to make number of loops,the free ends are held by the help of plasticine
2.loops of wire must not be overlapping and are adjusted to remove the gaps between 2 neighbouring loops.
3. Width if coils "L" (u get that from ruler reading) represents sum of diameters.
4. to calculate diameter of one strand (actual diameter) divide L by number of loops
thats why you buy a micrometer >>

 

[exploded diper]

those are sharingan eyes .. do you even watch anime ?

Haha lol ... I don't watch Naruto

 

[princess Anu]

Each division on main scale of Micrometer screw gauge accounts for 1mm?

 

[Uchiha-Sasuke]

Each division on main scale of Micrometer screw gauge accounts for 1mm?

0.5 mm