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And more importantly, how do I look at it/use it? I need to do some homework with it...

The PhotoElectric Effect one where he got a spark or something... I just realised I know nothing about it.

I've looked all over the Board of Studies website but I can't seem to find solutions, only the past papers. It makes no sense that they'd just have the questions there but not the answers...

Mars is approximately 0.1x the weight of Earth, and has approximately 0.5x the diameter of earth. What is the approximate force due to gravity on Mars? Answer: 4m/s^2

When would an MRI be more desirable to use than a PET scan? Like, specifically what diseases would be diagnosed better by each? I figure since MRI works on detecting Hydrogen nuclei, it'd show things more clearly where there is a lot of water or something. So would these be totally useless for...

I'm trying to deduce differences in the diagnosing processes for each, but the only thing I have come up with so far is: PET identifies tissue function SPECT identifies organ function As for anything else, I can't find it. How would a single photon emission (SPECT) have such a different...

An FM radio station transmits at a frequency of 102.8 MHz (how many Hz in a MHz btw?). What is the energy, in joules, of each photon emitted by the transmitter?

Hey guys, Just wondering if you could help me remember all of the experiments which we have done and need to know for upcoming tests? (i.e. half yearly's) So from what I remember there's titration, brewing beer, heating fizzy drink...etc. Yeah, so any help remembering would be great. Thanks!

Hey guys, Just wondering if you could help me remember all of the experiments which we have done and need to know for upcoming tests? (i.e. half yearly's) Off the top of my head, there's the pendulum experiment, orbital velocity prac, the hanging coil on a swing thingo... Yeah, so any help...

Find the area bounded by the curves: y=sin^-1x, y=sin^-1(-x) and the line y=pi/4 I get to the working out stage, and apparently you have to multiply the found area by MINUS two instead of two (i know that you do this because the areas are symmetrical) but why minus two? Answer: 2-rt2 units...

If sin a = 3/4, 0 < a <pi/2 and sin b = 2/3, pi/2 < b < pi find the exact values of: i. tan 2a ii. cos (a - b) screw it, the question wont post properly

Show that (1+cos2A)/(sin2a) = cotA

My current understanding leads me to believe that it is always some point equidistant from two different equation-lines. But I know there are some questions which specifically state that the equidistance is a condition of the locus. So what is a locus, really? Also, can anyone tell me the...

? Also, take this scenario: A drill works because of the motor effect. A drill begins drilling into a hard piece of wood, and slows considerably. This can cause the motor to overheat. Explain why the drill may overheat in this situation.

Some physics students wanted to measure the path of a projectile launched from the top of a building. The building is 15m high. a) If the projectile is launched with a velocity of 10m/s at an angle of 60 degrees to the horizontal, calculate its maximum height above the ground. b) Calculate...

Two points P(2ap, ap^2) and Q(2aq, q^2) lie on the parabola x^2 = 4ay. i. Show that the equation of the tangent to the parabola at P is y = px - ap^2. ii. The tangent at P and the line through Q parallel to the y axis intersect at T. Find the coordinawtes of T. iii. Write down the...

P is a variable point (2t, t^2) on the parabola x^2=4y, whose vertex is O. M, N, are the feet of the perpendiculars from P on to the axis and directrix respectively. R is the midpoint of OP and L is the midpoint of MN. Find the locus of: i) R ii) L ...why must parametrics be so hard... :'(

...burettes AND pipettes are used in titration instead of just one or the other? Cause from what I know they perform pretty much the same function...

5.267 anhydrous sodium carbonate was dissolved in water in a volumetric flask and the volume made up to 250 mL. 10 mL of this solution was pipetted into a concial flask, and titrated with hydrochloric acid. 21.3 mL was needed to reach the equivalence point. Calculate the molarity of the...

Prove by mathematical induction that 12/(1x3x4) + 18/(2x4x5) + 24/(3x5x6) + ... + [6(n+1)]/[n(n+2)(n+3)] = 17/6 - 1/(n+1) - 1/(n+2) - 4/(n+3) I'm seriously so bad at these.