Amazing video! thanks sir. I just wanted to let you know that the calculation you did in question 10 part A was maybe a bit off on the calculator, the answer is 24km/s rather 17.3km/s.
Onenote from microsoft office and inserted a print out of a picture of a protractor. There is also a free app called openboard where you can use all geometric equipment.
I’m confused when to convert to 2 decimal places or 3. In question 4c the answer is in 3 decimal places but in 5a the answer should be rounded to 2 decimal places. When do I know when to convert to 3 decimal places or 2?
according to the numbers given in the question you should use the minimum number of sig figs from the numbers in the question but it's allowed to add only one sig fig
I dont think so Surface area usually affects pressure and pressure is in no way related to floating or sinking in this case I was also confused at first but the marking scheme made it clear to me...i recommend you to check it The air kept below the ship is the major reason why the density of the ship became less than that of the water Hope you understood
23) if a wire or a coil is inside a magnetic field and there is already a current or connected to battery use Fleming's "Left" hand rule 24) if the question says induced current or emf or voltage use same rule but with the "right" hand 25) if there are no magnets at all, only a wire or coil and there is a magnetic field around them use right hand grip rule
You times 2 pie and the radius and you divide by time the mark scheme says 24 I think there is a problem in your calculator for calculations@@johnHeshmat
43) Planets are mercury Venus Earth Mars Jupiter Saturn Uranus Neptune in order 44) source of Sun energy is Hydrogen fusion energy released is electromagnetic radiation 45) galaxy is 100's of billions of stars ours is the Milky Way 46) Earth finishes one cycle around Sun in 365 days around itself in 24h and is tilted at 23.5 degrees 47) time of orbit and tilt causes seasons and time of rotation about Earth's axis causes night and day 48) When moon bet Earth and sun New moon (dark) 49) when Earth bet moon and Sun Full moon 50) Moon orbits Earth in 27.9 days and around itself in same time so only one side is visible 51) low mass star like Sun nebula-protostar-stable star-red giant-white dwarf and planetary nebula 52) High mass star nebula-protostar-stable star-red super giant-supernova-neutron star or black hole 53) red shift is the apparant increase in wavelength due to source of light moving away from observer 54) CMB cosmic microwave background is microwaves received from all directions showing heat from distant stars being red shifted 55) red shift and CMB prove that since all objects are moving away they must have all been in the same place at the same time at start of universe then expanded this is called the Big bang theory 56) light year is "distance" traveled by light in a year = 9.5x10^15 m 57) Hubble law is all light received from distant galaxies is red shifted so all of them are moving awa and theat their relative speed to earth is directly proportional to their distance v=Hd H is the hubble constant 2.2x10^-18 58) age of univers is calculated 1/H approx 14 billion years
orbital speed is incorrect, very useful video though, thank you sir, answer is 24 kms
check the description he told us the correction
Thank you very much for the video. Your videos are very helpful and your explanation clear.
Thank u sir … such a good explanation for each question
Amazing video! thanks sir. I just wanted to let you know that the calculation you did in question 10 part A was maybe a bit off on the calculator, the answer is 24km/s rather 17.3km/s.
thanks and yes I wrote that mistake and correction in the video description
thank you.!!!!
Sir please make a video on feb march 2023 P62 igcse physics
28:34 john if i draw lamp first and thermistor afterwards, would it make a difference?
no difference
@@johnHeshmat ok ty
let me know which application you use for teaching
Thanks
Could you say the app name you were using in question 5a)ii)
17:30
Onenote from microsoft office and inserted a print out of a picture of a protractor.
There is also a free app called openboard where you can use all geometric equipment.
I’m confused when to convert to 2 decimal places or 3. In question 4c the answer is in 3 decimal places but in 5a the answer should be rounded to 2 decimal places. When do I know when to convert to 3 decimal places or 2?
according to the numbers given in the question you should use the minimum number of sig figs from the numbers in the question but it's allowed to add only one sig fig
thanks for this btw
Hi! I wonder that if I use 10N/kg instead of 9.8😢will I be deducted mark because of this?
yes
they tell you what value to use for acceleration of free fall in the first page of the paper, for 2023 i believe it's 9.81
@@graiitex572yea lol
@@graiitex572it’s not 9.81, it’s 9.8… ig ur an A level student 💀
Sir in Q2 a , the answer could be wider base so it covers greater surface area making it float
I dont think so
Surface area usually affects pressure and pressure is in no way related to floating or sinking in this case
I was also confused at first but the marking scheme made it clear to me...i recommend you to check it
The air kept below the ship is the major reason why the density of the ship became less than that of the water
Hope you understood
No it’s always density
im always confused about when to use left hand rule and right hand rule, please tell me
23) if a wire or a coil is inside a magnetic field and there is already a current or connected to battery use Fleming's "Left" hand rule
24) if the question says induced current or emf or voltage use same rule but with the "right" hand
25) if there are no magnets at all, only a wire or coil and there is a magnetic field around them use right hand grip rule
Thank you sir
@@johnHeshmatty man
Is velocity a vector quantity according to this syllabus?
According to all syllabus’s
This does not change
nice pfp bro
Where can we get the pdf files for your answers.
Thanksin advance
I solve these live while I record them not prearranged
From when will this paper be available in websites
It should have already been available
they're late
@@johnHeshmat because refer the site
Hello, where can I find this paper?
dynamicpapers.com
Sir can u post the mark scheme of this paper
bruh can’t u search it urself
10a) i think shouldve been 24 km/s
yes u r right. thanks
the space questions it 24km/h it wrong but thanks for the whole video it was very good
can u please explain which part was wrong, thanks
You times 2 pie and the radius and you divide by time the mark scheme says 24 I think there is a problem in your calculator for calculations@@johnHeshmat
🤫
?
Denisty lol
thanks for pointing out the mistake i did when writing as fast as possible to post this for my students
@@johnHeshmat what do i need to know out of space physics please
43) Planets are mercury Venus Earth Mars Jupiter Saturn Uranus Neptune in order
44) source of Sun energy is Hydrogen fusion energy released is electromagnetic radiation
45) galaxy is 100's of billions of stars ours is the Milky Way
46) Earth finishes one cycle around Sun in 365 days around itself in 24h and is tilted at 23.5 degrees
47) time of orbit and tilt causes seasons and time of rotation about Earth's axis causes night and day
48) When moon bet Earth and sun New moon (dark)
49) when Earth bet moon and Sun Full moon
50) Moon orbits Earth in 27.9 days and around itself in same time so only one side is visible
51) low mass star like Sun
nebula-protostar-stable star-red giant-white dwarf and planetary nebula
52) High mass star
nebula-protostar-stable star-red super giant-supernova-neutron star or black hole
53) red shift is the apparant increase in wavelength due to source of light moving away from observer
54) CMB cosmic microwave background is microwaves received from all directions showing heat from distant stars being red shifted
55) red shift and CMB prove that since all objects are moving away they must have all been in the same place at the same time at start of universe then expanded this is called the Big bang theory
56) light year is "distance" traveled by light in a year = 9.5x10^15 m
57) Hubble law is all light received from distant galaxies is red shifted so all of them are moving awa and theat their relative speed to earth is directly proportional to their distance v=Hd
H is the hubble constant 2.2x10^-18
58) age of univers is calculated 1/H approx 14 billion years
@@johnHeshmat Where did you get these from?
@@Abdullah-sq4ws I'm a teacher!!!