IGCSE Math - Bearing

[elemis]

Question 2

a) Looking at diagram 2 first add up the straight side lengths. 6 + 22 + 18 + 10 =  56

Then find the the arc length of the quarter circle in the top left hand corner. This is done by = 18.849 + 56 = 74.8 cm

b) Looking at diagram 2 again. 10 x 18+ 6 x 12 + 0.25 x pi x 12² = 365 cm²

c) Take the area previously calc. and multiply by the length (40 cm).

d) tomorrow. Have to go now.

[Galleria]

loooool thanks !
do you know physics/chem ?
Can you answer this question generally?
If there are two electrodes connected to a voltmeter and a circuit, then how do we ensure that the gap between them remains equal or how can we measure the gap without putting a ruler inside the beaker ? . lol

[Arthur Bon Zavi]

loooool thanks !
do you know physics/chem ?
Can you answer this question generally?
If there are two electrodes connected to a voltmeter and a circuit, then how do we ensure that the gap between them remains equal or how can we measure the gap without putting a ruler inside the beaker ? . lol

By Using Sensors connected to the computer!

[elemis]

loooool thanks !
do you know physics/chem ?
Can you answer this question generally?
If there are two electrodes connected to a voltmeter and a circuit, then how do we ensure that the gap between them remains equal or how can we measure the gap without putting a ruler inside the beaker ? . lol

I did Physics and Chem for my IGCSEs

I remember this question - from paper 6, right ?

I wrote separate the electrodes using a block of wood. My teacher said that would be an acceptable answer.

[Arthur Bon Zavi]

Q was - The student wishes to measure the height of the image on the screen in order to check
his result. However he finds that when he tries to do this his hand and the rule prevent
the light reaching the screen. Suggest briefly a method he could use to measure the
height of the image on the screen that would overcome this problem.


AND This Was the Answer as on the marksheet:

scale drawn on paper on screen/graph paper on screen/
mark on screen (then) measure/clamp ruler on scale/
use translucent screen and measure from other side 

 

[Galleria]

@ the only one .. that's not it -___-

and lool thanks! @ Ari . But it was for some other year lol . hmm but then how would the electrodes remain steady ? i mean they could move and stuff

[elemis]

@ the only one .. that's not it -___-

and lool thanks! @ Ari . But it was for some other year lol . hmm but then how would the electrodes remain steady ? i mean they could move and stuff

Does this answer your question ?

[elemis]

The wooden block would basically keep the electrodes separated by a certain distance (depending on how much you need) and the the clamps hold the electrodes steady.

By the way, the grey rectangles are the electrodes

[elemis]

This will answer your other question.

[Galleria]

Thank you sooooooo much! Are you doing your A Levels or something ? lol

[elemis]

Thank you sooooooo much! Are you doing your A Levels or something ? lol

Yeah, I just started my AS Levels.

[Galleria]

hey are you around ? i need some serious physics and chem help . lol

[astarmathsandphysics]

I will help. Post your questions.

[Galleria]

oh thaaaanks! wait a second . they're o level questions

[Galleria]

http://www.xtremepapers.net/CIE/Cambridge%20O%20Levels/5124%20-%20Science%20(Physics,%20Chemistry)/5124_s03_qp_3.pdf - Question 3
http://www.xtremepapers.net/CIE/Cambridge%20O%20Levels/5124%20-%20Science%20(Physics,%20Chemistry)/5124_w03_qp_3.pdf - Question 5
http://www.xtremepapers.net/CIE/Cambridge%20O%20Levels/5124%20-%20Science%20(Physics,%20Chemistry)/5124_w05_qp_3.pdf - Question 6
http://www.xtremepapers.net/CIE/Cambridge%20O%20Levels/5124%20-%20Science%20(Physics,%20Chemistry)/5124_w07_qp_2.pdf - Q 8 and 9
I just need to know the correct answers ... there are no mark schemes
I know they're O level questions but it's our homework ... marked out of 10 . i'm giving my igcse's.