Rattlehead15
Well-Known Member
For people who do physics, definitely including @scaryshark09 , do we need to know equation examples of alpha, beta and gamma decay off by heart? Can they ask us to give an example??
i would say it is best to learn these equations off by heart.For people who do physics, definitely including @scaryshark09 , do we need to know equation examples of alpha, beta and gamma decay off by heart? Can they ask us to give an example??
Thank you for your current physics student insight. Unironically, I will be memorising a couple nowi would say it is best to learn these equations off by heart.
they can ask to give an example
its good to go a bit beyond the syllabus and do your own research into the topics, having extensive knowledge wont only help u for short answers but more importantly long answer qs.Thank you for your current physics student insight. Unironically, I will be memorising a couple now
Yeah but what about actual like real world examples like uranium something -----> uranium something elselol i actually still did physics when i learnt this
these generic equations are something you should know
View attachment 41198
Anything to get a band 6 in this subject I want to finish the hsc on a high note so bad.its good to go a bit beyond the syllabus and do your own research into the topics, having extensive knowledge wont only help u for short answers but more importantly long answer qs.
tbh shouldnt be too hard, just know what to write and practice a lot before the paper so u familiarise with the structure and type of qs.Anything to get a band 6 in this subject I want to finish the hsc on a high note so bad.
74/100 but got 11/20 on multiple choiceIf anyone's done the parramatta hs trial 2023 lmk your mark, I got 75/100, screwed up the last question but feel pretty good about that mark
95 would definitely be at least a band 5How much yall reckon is gonna be good enough for a band 5 gonna be this year
Depends on how hard the paper is which is pretty unpredictable atpHow much yall reckon is gonna be good enough for a band 5 gonna be this year
I think for band 6 you actually have to write your own question in the spare page section and get it right to get over 100%95 would definitely be at least a band 5
HELP PLEASE!
View attachment 41236
View attachment 41233
View attachment 41234
View attachment 41235
Does anyone know how to solve these questions? They're from the 2023 parramatta high school trial paper
Below are their answers:
10: B
13: A
14: B
There might be an easier way to do 10 but you calculate the time of flight for all the launches then find the range for all the launches.HELP PLEASE!
View attachment 41236
View attachment 41233
View attachment 41234
View attachment 41235
Does anyone know how to solve these questions? They're from the 2023 parramatta high school trial paper
Below are their answers:
10: B
13: A
14: B
There might be an easier way to do 10 but you calculate the time of flight for all the launches then find the range for all the launches.
i got d for 13 so I can’t help you with that one.
Don’t over complicate 14.
thank you for this !for q10, you want to find a general formula for the range of a projectile. range occurs when the y displacement =0.
so from s=ut+1/2at^2, you let s=0. you also know that you can divide by t, because that is at the origin, we're looking for the t when it hits the ground again.
therefore, 0=usintheta+(1/2)(-9.8)t
hence t=2usintheta/9.8
now the range is the horizontal component multiplied by time travelled
so Range = Utcostheta
= 2U^2sinthetacostheta/9.8
= (u^2)sin2theta/9.8
now sub in all values given in options, and B should be the largest.
13. Use kepler's 3rd law, and remember that the r value that you find is the radius of the earth plus the altitude.
14. Remember that during uniform circular motion, the value of the centripetal accel is v^2/r. both v^2 and r are constant in this example, so accel is also constant hence B
you have to minus the radius of earth (6371km) from 6759.8, so 6759-6371km = 388.8 km and that's the answerThere might be an easier way to do 10 but you calculate the time of flight for all the launches then find the range for all the launches.
i got d for 13 so I can’t help you with that one.
Don’t over complicate 14.
Because E = mc^2 Energy is released as the smaller components always have more mass than the final larger product.View attachment 41243
Can someone explain why the answer is D and not C? (question from PHS)