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AS Physics P1 MCQs Preparation Thread.
14. (cos45)^2. 28. Mass=F/a. F=Eq, so mass=Eq/g. Charge=q. Charge/mass=q/Eq/g=qg/Eq. q cancels out, g/E is left. -
AS Biology P1 MCQs Preparation Thread
1. That's just something you have to memorise. 11. A glycogen molecule has 1,4 and 1,6 bonds. 30. The stroke volume will increase when the ventricular end-diastolic volume increases, but not proportionally because not all the blood will leave the systole. -
P1 MCQ's preparation thread for chemistry ONLY!!!!
You have to know the reaction that takes place when NH3 is added to AgCl. AgCl + 2NH3 = [Ag(NH3)3]+ + Cl-. It doesn't act as a base because there's no NH4+ formed. It doesn't act as a reducing agent because nothing is reduced. A ligand is just a complex ion. Now all you have to do is decide... -
P1 MCQ's preparation thread for chemistry ONLY!!!!
Because a polymer is made of many monomers. So 1 mole of polymer needs more than just 1 mole of monomer; it needs probably hundreds or thousands. So 1 mole of monomer will yield any number of moles LESS THAN 1 of polymer. -
Chemistry: Post your doubts here!
Draw CCl3CF3 and CCl2FCF3. What's the difference? A Flourine atom. Free radical substitution. -
Chemistry: Post your doubts here!
Multiply by Avogadro's constant. -
Chemistry and Physics AS paper 12 MCQS
1 C=C double bond with take 1 mole of H2. Count the number of C=C bonds initially present in the molecule, and then the number of C=C left after the reaction. Minus the second from the first to get the number of H2 moles. -
Chemistry and Physics AS paper 12 MCQS
The profile shown is for an Sn1 mechanism reaction, i.e. a 2-step reaction, one in which only tertiary alcohols/halogenoalkanes/etc. will take part. -
Chemistry and Physics AS paper 12 MCQS
Construct a balanced equation. -
Chemistry: Post your doubts here!
Draw an ICE chart, i.e. initial concentration, change in concentration and equilibrium concentration for all the reactants and products. -
AS Physics P1 MCQs Preparation Thread.
12. You have to consider the angles between T1 and R1 and T2 and R2. T1 cos(angle) gives you R1. What happens to cos(angle) if the angle decreases? 14. At the highest point of a parabolic trajectory, the vertical component of the velocity = o. So the K.E. can come only from the horizontal... -
As physics p1 MCQS YEARLY ONLY.
11. M1v1=M2v2, so v1/v2=M2/M1. 21. A mass of a liquid of density ρ is thoroughly mixed with an equal mass of another liquid of density 2ρ. No change of the total volume occurs. So the volume of the first liquid = m/ρ. The volume of the second liquid = m/2ρ. Add the volumes to get 3m/2ρ. So ρ of... -
Physics: Post your doubts here!
No, the generator is supplying this power because of the power generated by the water. -
Physics: Post your doubts here!
1. Draw a free-body diagram on the 8 kg mass. The force to the right will be the weight of the 2 kg mass. The force backwards will be 6 N. a=F/m, and m=8+2 kg. -
Physics: Post your doubts here!
28. Use lambda=ax/D. Eliminate whatever's not mentioned in the question. -
AS Physics P1 MCQs Preparation Thread.
I put in numbers for this. Say V = 6 V and the resistance of each resistor = 2 ohms. The PD across the combination QR = 1/3 x 6 = 2 V. The Power through resistor R = (2^2)/2=2. -
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Physics: Post your doubts here!
The question says 'the generator SUPPLIES a current of 32 A at a voltage 230 V'. -
Physics: Post your doubts here!
12. The relative velocities of approach are u1--u2=u1+u2. The relative velocities of separation are v1+v2. 18. (32 x 230)/(200 x 9.81 x 8). -
Physics: Post your doubts here!
15. mg-kv=o because the velocity is constant so the resultant force = o. Make v the subject and use 1/2m(v^2) to find the K.E. 25. The fundamental frequency in tube X will be when lambda = 1/4, and in tube Y when lambda = 1/2. 26. v=fxlambda. Find the wavelength (it's twice the distance between...