Daniel2590 wrote: » Joules law, conservation of momentum, speed of sound in air and snells law were the experiments. Q6 had derivation of F=ma, difference between vectors and scalars, then the calculation was based on a golf ball being hit (find initial speed and Max height)
Daniel2590 wrote: » Did anyone who does applied maths use projectiles for Q6 actually? I used max height when Vy = 0 and all that craic :pac:
LifeasaPigeon wrote: » Yeah, and I usually avoid mechanics but it was too lovely not to do applied maths finally came in handy for something!
qweerty wrote: » Why do you avoid Mechanics considering you do AM?
b0gg3r wrote: » Such a paper. Delighted. Only thing I know now that I got wrong was the last part of question 11, the formula about the momentum of a particle in a cyclotron. Hoping the marking scheme isn't too rough, but most of the guys in my school found it easy enough, one nutter even did every question!
aleatorio wrote: » Was that mv = qBr ?
AtomicKoala wrote: » Yeah, I assume you should write p = qBr, as p is momentum (p = mv)
Daithi MacG wrote: » My friend did it that way and said he got something like 53m, whereas I got something around 13m. What did you get?
FatRat wrote: » What a test! So unbelievably easy. Suspiciously too easy tbh... Something's up with how easy it was.
aleatorio wrote: » Ok so I scribbled down a majority of my calculations answers: Q2: n=1.175 Q3: v= 339 Q4: Temp = 25.5 Q5: (b) 6.563 x 10^23 (d) 75.6J (h) 2.1627 x 10^-19 Q7: Energy of photon = 2.8036 x 10^-19 Number of lines = 400 Q8: 7.628 x 10^24 nuclei Q9: Charge = 3.6 x 10^-5C Energy = 2.16 x 10^-4 New capacitance: 4 x 10^-6F Q10: speed = 29.025 Resistance = 17.36 ohms Q11: Frequency = 2.4177 x 10^14Hz Decay constant = 5.77622 x 10^-4 Q12: (A) Length = 4.13cm Period = 0.2565s (C) Mass = 0.014375kg Temp = 21.45 (these are wrong, just realized I only did it for 1 ice cube )
CL987 wrote: » got the exact same for every q, including the wrong ice calculation haha
Daithi MacG wrote: » Think I got n=1.475 for Q.2...whoops I remembered to multiply by three for three ice cubes and got an answer of around 16 degrees for the temp.
2thousand14 wrote: » I got 1.475 too
aleatorio wrote: » I could be wrong idk :pac: Did you remember to take it away from the initial temp? It asked for the temp of the water not the change in temp Does anyone know if I got the wrong mass for the icecubes how will that impact the marking for the rest of the q?
