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Faris_Waleed:
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pentanol has four structural isomers that are primary alcohols.how many of these primary alcohols have a chiral carbon atom?
 updated one month ago
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Faris_Waleed:
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Solve for x , in the interval 0<x<360:
sin x + cos x = 0
 updated 5 months ago
 5 replies
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Faris_Waleed:
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Oxidation of an alkene Y gives a diol and further oxidation gives a diketone. What could be Y?
(a): CH3CHC(CH3)2
…
 updated 5 months ago
 3 replies
 1 Medal

Faris_Waleed:
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A salesman is paid commission of £10 per week for each life insurance policy that he's sold. Each week he sells one new policy so he's paid …
 updated 6 months ago
 1 reply
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http://papers.xtremepapers.com/Edexcel/Advanced%20Level/Mathematics/Subject%20Sorted/M1/M1%20200601.pdf
Can anyone help in question 6 (d…
 updated 7 months ago
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A cruiser C is sailing due east at a constant speed of 20 kmh1 and a destroyer D is sailing due North at a constant speed of 10 kmh1. At…
 updated 8 months ago
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A mountain rescue post O receives a call via a mobile phone from a walker with emergency. The walker says he is by a pipeline and he can als…
 updated 8 months ago
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Faris_Waleed:
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Calculate the standard enthalpy of formation of ethane using the following information:
Average standard bond enthalpies are CC= 348kJ/…
 updated 8 months ago
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At high speeds the resistive frictional force produced by air on a body moving with velocity v is given by the equation F=bv^2 where b is co…
 updated 9 months ago
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Can anyone help me to convert from degrees to radians because i tried solving: 392*cos60= 230 were 60 is in degrees and 392*cos60= 391.9 wer…
 updated 11 months ago
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Faris_Waleed:
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The forces acting on the body cause it to accelerate as shown. Find the magnitude of the unknown force P
 updated 11 months ago
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Faris_Waleed:
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A particle is projected vertically upwards from a point O with speed u ms^1. Two seconds later it is still moving upwards and its speed is…
 updated 11 months ago
 5 replies
 1 Medal

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A particle P is moving on the xaxis with constant deceleration 4m/s2. At time t=0, P passes through the origin O with velocity 14m/s in th…
 updated 11 months ago
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Faris_Waleed:
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A particle P is moving on the xaxis with constant deceleration 4m/s2. At time t=0, P passes through the origin O with velocity 14m/s in th…
 updated 11 months ago
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Faris_Waleed:
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http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_s09_qp_4.pdf
Question 11 (d) (i) and (ii)
 updated one year ago
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All of 60 different vitamin pills contain at least one of the vitamins A, B and C. Twelve have A only, 7 have B only, and 11 have C only. If…
 updated one year ago
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Faris_Waleed:
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Wire A has a resistance of 12 ohms. If wire B is twice the length of A and twice the diameter, what is its resistance? ( Assume that both wi…
 updated one year ago
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Faris_Waleed:
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Draw a distancetime graph with 2cm to 10 units for the yaxis :
Mrs Chuong leaves home at 08:00 and drives at a speed of 50km/h. After 1…
 updated one year ago
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Faris_Waleed:
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An object is supplied with 6000 J of heat energy and its temperature increases from 15 C to 18 C. Calculate the thermal capacity of the obje…
 updated one year ago
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Faris_Waleed:
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Find two solutions of the equation : ( cos x)square= 1/4 for x between 0 and 180 degrees.
 updated one year ago
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Faris_Waleed:
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An observer at top of a tower of height 15m sees a man due west of him at an angle of depression 31 degrees. He sees another man due south o…
 updated one year ago
 13 replies
 1 Medal

Faris_Waleed:
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Can somebody explain to me polymerisation and addtion polymerisation and condensation polymerisation?
 updated one year ago
 2 replies
 1 Medal

Faris_Waleed:
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Find an integer value of x such that:
2x7<8<3x11
 updated one year ago
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Faris_Waleed:
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W varies as square root (H). If W=6 and H=4, then calculate the value of W when H=9.
 updated one year ago
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3.2 g of iron is added to 50 cm3 of 1.0 mol/dm3 sulfuric acid: Fe+H2SO4= FeSO4+H2
(a): Calculate the number of moles of sulfuric acid prese…
 updated one year ago
 1 reply
 1 Medal

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An aircraft flies 400 km from a point O on a bearing of 025 and then 700 km on a bearing of 080 to arrive at B.
(a): How far north of O …
 updated one year ago
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Faris_Waleed:
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Cathode rays oscillsocope, can someone expalin that to me??
 updated one year ago
 14 replies
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Faris_Waleed:
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http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Physics%20(0625)/0625_w08_qp_03.pdf
First variant question paper
…
 updated one year ago
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Faris_Waleed:
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What is inertia??
 updated one year ago
 3 replies
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Faris_Waleed:
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Q9 (b): http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_w07_qp_3.pdf
HELP PLEASE
 updated one year ago
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