Physics Predictions/Thoughts (1 Viewer)

[liamkk112]

View attachment 41243
Can someone explain why the answer is D and not C? (question from PHS)

the question is screwed; nuclei heavier than iron will have an increase in mass in fusion reactions, as energy will need to be absorbed for the nuclei to combine. nuclei lighter than iron will have a decrease in mass as energy will be released as the nuclei combine. so technically C and D are both correct, depending on which nuclei are fusing.

btw, the heavier and lighter than iron is to do with the fact that iron nuclei are the most stable and hence have the most binding energy per nucleon. then all elements lighter release energy by fusion, all events heavier absorb energy by fusion (classic graph)

 

[salihaaaameeer]

Because E = mc^2 Energy is released as the smaller components always have more mass than the final larger product.

wouldn't that mean the answer its c, im so confused

 

[liamkk112]

wouldn't that mean the answer its c, im so confused

if i was u i would just ignore the q bc its janked lol

 

[abelsj01]

is anyone else severely underprepared for physics?

 

[Trippzy]

is anyone else severely underprepared for physics?

absolutely. all that chem stuff in mod 8 and the theory in mod 7 is gonna fk me, also idk why but I cant get beyond 14 in mcq

 

[The Wragg]

is anyone else severely underprepared for physics?

Honestly yea

thought i would use my time better but burn got the best of me lmao
These last couple of days of study have sure been a fine trudge to say the least

 

[Interdice]

Oh god. Module 8 is awful. The textbook is awful. Please give good resources

 

[carrotsss]

Oh god. Module 8 is awful. The textbook is awful. Please give good resources

i only just discovered now but the scienceready youtube channel is amazing, I’ve been using it to brush up on the content heavy things that I’m lacking in and it’s worked really well

 

[carrotsss]

is anyone else severely underprepared for physics?

aren’t we all

 

[liamkk112]

Pretty sure this is also why Stars become supernovas after they form iron core, because iron cant release energy to balance the inward gravity so the star collapses.

ye that would make sense

 

[Yueyue]

I hate history I didn’t pick it for a reason WHY is it appearing in physics

 

[abelsj01]

science ready is the most clutch channel ever now im confident i can learn 3 modules in one day

 

[scacredcat]

science ready is the most clutch channel ever now im confident i can learn 3 modules in one day

I believe in you, state rank here we come

 

[carrotsss]

Id rather history than magnets and special relativity

what’s it like being wrong

 

[CamdenCeccato]

What did aanyone get for NEAP trial 2023?

 

[Trippzy]

What did aanyone get for NEAP trial 2023?

can u send

 

[abelsj01]

is the definition of an ampere the one where two current carrying conductors of infinite length placed one metre apart blah blah blah or is it simply I = q/t? science ready says that the former is the old definition and the latter is the new one but ive been taught it as the former definition

 

[SB257426]

is the definition of an ampere the one where two current carrying conductors of infinite length placed one metre apart blah blah blah or is it simply I = q/t? science ready says that the former is the old definition and the latter is the new one but ive been taught it as the former definition

its the carrying conductors definition. Its required for us to know the relation between the ampere and newtons third law

 

[carrotsss]

its the carrying conductors definition. Its required for us to know the relation between the ampere and newtons third law

wait what I forgot about this can you explain

 

[SB257426]

wait what I forgot about this can you explain

Sure !

So basically the definition of the ampere is "A constant current magnitude which when flowing in 2 parallel conductors of infinite length, of negligible cross sectional area and placed 1 m apart, would produce a force of 2*10^-7 N/m between these conductors"

Its just linked to newtons third law because the magnitude of the force experienced by both conductors is the same. Thats pretty much it