Paper 6(2) Physics

[Lost_Life]

there's a question i'd like to ask...

 

[EpicLol]

ummm then ask? I can try to help

 

[Lost_Life]

) The cylinder completely covers the marks on the metre rule. Describe, with the aid of
a diagram, how you would judge that the centre of the cylinder is directly above the
10.0 cm mark.

HOW CAN WE DO THIS? MY SUGGESTION IS THAT,

 

[JOEJOE]

I think u gotta measure the thickness and then adjust ur calculations.. what does ur ms say bro

 

[Lost_Life]

I think u gotta measure the thickness and then adjust ur calculations.. what does ur ms say bro

i dunno it says correct diagram :S and explanation :O

 

[Ritter]

Mark Scheme Says:

Any two from:
Readings taken at either side/diameter of cylinder
Position of mid point found
Mark position of centre

June 2009 no.5 (b)

 

[Lost_Life]

Mark Scheme Says:



June 2009 no.5 (b)

so is it right??:S

 

[JOEJOE]

Ok then nice

 

[Ritter]

so is it right??:S

Well, I think Yes

 

[Lost_Life]

kay then, um what about the thickness of a cylinder

 

[JOEJOE]

Both of our answers are correct

 

[Lost_Life]

kay then, um what about the thickness of a cylinder

???

 

[JOEJOE]

Find the diameter look at the front reading to the left of the cylinder and the reading to the right of the cylinder

Half the diameter

Add it to the left reading it should give 10cm since the mark is in the half of it.. u get me?

Use a ruler to get the diameter!

 

[Lost_Life]

Find the diameter look at the front reading to the left of the cylinder and the reading to the right of the cylinder

Half the diameter

Add it to the left reading it should give 10cm since the mark is in the half of it.. u get me?

nope not a thing...........

 

[Lost_Life]

which paper is this

2008 mj

 

[darwish salma]

) The cylinder completely covers the marks on the metre rule. Describe, with the aid of
a diagram, how you would judge that the centre of the cylinder is directly above the
10.0 cm mark.

HOW CAN WE DO THIS? MY SUGGESTION IS THAT,
View attachment 11324

yeah its totally accepted , actullay its the easiest and the only one

 

[Lost_Life]

To produce more accurate or reliable results:• Repeat experiment, to calculate average reading.
• Avoiding parallax error, look perpendicular to the ruler.
• If accuracy in measurement was asked, check for zero error.
Improvements that could be done to the experiment (temp. cooling):• Same initial temperature.
• Same volume of water.
• Same shape of beaker.
• Beakers of same surface.
• Same room temperature.
• Stirring the water in the beakers.
• Same time intervals.
• Same surface area. (Unless given different containers)
• Adding water or cooling effect at regular intervals.
Heat loss could be reduced by:
• Insulation of beaker.
• Covering beaker with a lid.
For 2 values to be directly proportional,• The graph of the values must be a straight line from the origin.
• As value 1 increase, value 2 increases.

For images produced from lenses on screens, precautions taken:
• Use of a darkened room for the experiment.
• Avoiding parallax error in measurement, and look perpendicular to the ruler.
• Object and lens at the same height from bench.
• Object/lens/screen is perpendicular to the bench.
To draw an image created from lens:
• Inverted from the original object.
• Sides are multiplied by the magnification.
*If values have difference by 0.1 or 0.01, that is the limit of experimental accuracy, so answers are about the same.
For spring extension experiment, variables that should be constant in the experiment:
• Number of coils.
• Diameter of spring.
• Selection of loads.
• Mass of spring.

for improving the accuracy of the results (for experiments):
Minimizing heating effect of a current:• Lower current
• Increase voltage
• Add a lamp
• Increase resistance of a resistor
To increase accuracy of ray diagrams
• View bases of pins since pins may not be vertical
• Keep pins further apart
• Use more pins
• Avoid parallax, explain action and reason
• Repeats and average
Adjustments made to experiments will be made to increase accuracy
Improvement made to experiments about heating effect and insulation• Lids
• Repeats
• Stirring
• Record max. Temperature
• Add insulation
• Keep constant room temperature
• Avoid heat loss
How to check if a rule is vertical:• Protractor
• Use of set square
• Plumb line
• Spirit Level

Periodic time (T) is measured by timing a number

of oscillations, then divide the time taken for all the oscillations by the number of oscillations

 

[JOEJOE]

Please explain spirit level and set square please... also plumbline!! thanks

 

[Lost_Life]

 

[Mustafa omar]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_s09_qp_6.pdf
Question 1 a iii I need the answer fast can someone draw it to me