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Author Topic: IGCSE PHYSICS DOUBTS HERE !!!!  (Read 54463 times)

Offline SauD~

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #195 on: May 11, 2011, 05:21:26 am »
Quote from: AboD on May 10, 2011, 04:54:48 pm
outer space?
wouldn't it be better to feed many hungry people, than wasting money on correct disposal of radioactive.. :-\
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Offline NotAbod

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #196 on: May 11, 2011, 09:53:44 am »
Quote from: $~SauD~$ on May 11, 2011, 05:21:26 am
wouldn't it be better to feed many hungry people, than wasting money on correct disposal of radioactive.. :-\
true, but its better than making them live with mutations!!!
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Offline SauD~

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #197 on: May 11, 2011, 10:04:41 am »
Quote from: AboD on May 11, 2011, 09:53:44 am
true, but its better than making them live with mutations!!!

true true... but if just leave the radioactive material in the outer space what are chances if it may come back? due to gravity? :-\
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Offline NotAbod

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #198 on: May 11, 2011, 10:08:40 am »
Quote from: $~SauD~$ on May 11, 2011, 10:04:41 am
true true... but if just leave the radioactive material in the outer space what are chances if it may come back? due to gravity? :-\

they will take care of it and make sure it wont come back due to gravity
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Offline SauD~

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #199 on: May 11, 2011, 10:35:39 am »
Quote from: AboD on May 11, 2011, 10:08:40 am
they will take care of it and make sure it wont come back due to gravity
would that be a lot expensive?
Going to space/planet to bury a small quantity of radioactive substance almost every year or half year? :-\
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Offline NotAbod

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #200 on: May 11, 2011, 10:39:03 am »
Quote from: $~SauD~$ on May 11, 2011, 10:35:39 am
would that be a lot expensive?
Going to space/planet to bury a small quantity of radioactive substance almost every year or half year? :-\
yes it is!
they have to find a better way of disposal.
if i will dispose radioactive material near ur house, u wont like it.
this should be moved to the debates section
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elemis

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #201 on: May 11, 2011, 10:56:34 am »
Can we please remain on topic over here ? This thread is for Physics doubts not debating.
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Offline SauD~

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #202 on: May 11, 2011, 11:32:10 am »
Quote from: Ari Ben Canaan on May 11, 2011, 10:56:34 am
Can we please remain on topic over here ? This thread is for Physics doubts not debating.

yes, sorry
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Offline ~ Miss Relina ~

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #203 on: May 11, 2011, 08:08:05 pm »
hello anybody expalin this plz
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Offline Vin

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #204 on: May 11, 2011, 09:16:57 pm »
Least count = 0.01 cm
Vernier scale reading(division) = 4 (4th division's coinciding)
main scale reading = 0.10 cm (the 0th division's right after 0.1 and before 0.2, so in between two values you always take the lower value )

Total reading = main scale reading + (vernier scale division x least count)

TR = MSR + (VSR x LC)

= 0.10 + (4 x 0.01)
= 0.10 + 0.04
= 0.14 cm
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Offline ~ Miss Relina ~

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #205 on: May 11, 2011, 10:02:13 pm »
Quote from: Vin on May 11, 2011, 09:16:57 pm
Least count = 0.01 cm
Vernier scale reading(division) = 4 (4th division's coinciding)
main scale reading = 0.10 cm (the 0th division's right after 0.1 and before 0.2, so in between two values you always take the lower value )

Total reading = main scale reading + (vernier scale division x least count)

TR = MSR + (VSR x LC)

= 0.10 + (4 x 0.01)
= 0.10 + 0.04
= 0.14 cm

thank you very much  :D

ah i wanna ask also does this also apply for the micrometer or it does not have zero error and if itt does is it by the same method u showed to me
Thanks in advance
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Offline SauD~

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #206 on: May 12, 2011, 09:16:34 am »
Quote from: Vin on May 11, 2011, 09:16:57 pm
Least count = 0.01 cm
Vernier scale reading(division) = 4 (4th division's coinciding)
main scale reading = 0.10 cm (the 0th division's right after 0.1 and before 0.2, so in between two values you always take the lower value )

Total reading = main scale reading + (vernier scale division x least count)

TR = MSR + (VSR x LC)

= 0.10 + (4 x 0.01)
= 0.10 + 0.04
= 0.14 cm
Good doubt relina.. and i guess micrometer and calipher are same things :-\

Vin i didn't understand :(
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Offline Master_Key

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #207 on: May 12, 2011, 01:50:40 pm »
Quote from: $~SauD~$ on May 12, 2011, 09:16:34 am
Good doubt relina.. and i guess micrometer and calipher are same things :-\

Vin i didn't understand :(
Vernier Calliper.
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elemis

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #208 on: May 12, 2011, 02:17:17 pm »
Quote from: Relina on May 11, 2011, 10:02:13 pm
thank you very much  :D

ah i wanna ask also does this also apply for the micrometer or it does not have zero error and if itt does is it by the same method u showed to me
Thanks in advance

Are you sure you understand what a zero error is ?
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Offline Vin

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Re: IGCSE PHYSICS DOUBTS HERE !!!!
« Reply #209 on: May 12, 2011, 03:28:45 pm »
Quote from: $~SauD~$ on May 12, 2011, 09:16:34 am
Good doubt relina.. and i guess micrometer and calipher are same things :-\

Vin i didn't understand :(

okay, there are certain methods to go about on the calculations for both the instruments.

you have to understand first WHY do you actually use those instruments rather than a regular ruler. The simple and primary reason being they provide more accuracy. There are others as well - they can calculate the diameter accurately etc.

vernier callipers (vc) and micrometer gauge (mg) are NOT the same thing however the theoretical calculation is similar.

VC has a least count of 0.01 cm so it can calculate the diameter of an object to 3 sfg.
MG has an LC of 0.001 cm
^ These are standard least counts for instruments. This can vary too.

Google the rest please because theres a lot to learn and i cannot possibly type everything because i have to go study chemistry.

http://www.tutorvista.co.uk/content/physics/physics-i/measurement-and-experimentation/vernier-callipers-animation.php

http://www.tutorvista.co.uk/content/physics/physics-i/measurement-and-experimentation/screw-gauge.php

^ These should cover pretty much everything up including the calculation for LC and zero error.
« Last Edit: May 12, 2011, 03:38:05 pm by Vin »
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