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Thanks!

arigato

i spent a hour reading text books and notes trying to find out where did i do wrong:)

on god preach

This question is also in the HL paper as question 23. The HL markscheme says C (1/4) is correct. I agree. The SL markscheme says A is the correct answer. I disagree.

In the IB markscheme, it says the answer is A. Is the markscheme wrong?

how did u get access to this paper?

tysm bro I rlly needed an explanation for this qn, thx a lot 🙏

Question: Surely C is also technically correct, because even below critical angle, we still get partial reflection, so a light ray could possibly take this path?

Can you please post long videos where you answer past paper questions? please

thank youu

If I am retaking for May 2025, do I need to also change my IA since there are new guidelines and requirements for the IA, thank you

Could you please explain what does "Topics with content that should be taught to all students plus additional HL content" @0:45 mean?

Thank u

Any chance to upload paper 2 questions?

thank you, keep posting

Question Timestamps: 0:15 | 1. A car has an initial speed of 16 m s-1. It decelerates at 4.0 m s-2 until it stops. What is the distance travelled by the car? 2:15 | 2. A block of mass 2.0 kg accelerates from a speed of 15 m s-1 to a speed of 20 m s-1 without changing its direction. What impulse acts on the block? 3:35 | 3. A net force of 8.0 N accelerates a 4.0 kg body from rest to a speed of 5.0 m s-1. What is the work done by the force? 5:20 | 4. A person stands in an elevator (lift). The total mass of the person and the elevator is 800 kg. The elevator accelerates upward at 2.0 m s-2. What is the tension in the cable? 7:40 | 5. An object is released from rest in a vacuum at a height H above the Earth’s surface. As the object falls it passes a point at a height of 0.75H above the surface. What is kinetic energy of the object at a height of 0.75 over the gravitational potential energy of the object at a height of H? 9:45 | 6. A bird of weight W sits on a thin rope at its midpoint. The rope is almost horizontal and has negligible mass. The tension in the rope is 12:25 | 7. The internal energy of a real gas is 13:15 | 8. The black-body radiation curve of an object at 600 K is shown. The intensity units are arbitrary. What is the radiation curve of the same object at 450 K? The original curve is shown with a dashed line. 14:30 | 9. Star X has a luminosity L and an apparent brightness b. Star X is at a distance d from Earth. Star Y has the same apparent brightness as X but is four times more luminous. What is the distance of Star Y from Earth? 17:05 | 10. Four identical resistors, each of resistance R, are connected as shown. What is the effective resistance between P and Q? 18:50 | 11. Conductor X is connected to a cell of emf E. A power of 16 W is dissipated in X. Conductor Y is made from the same material with the same diameter as X but is twice as long. A cell of emf 2E is connected to Y. Both cells have negligible internal resistance. What power is dissipated in Y? 21:20 | 12. Two containers, X and Y, are filled with an ideal gas at the same pressure. The volume of X is four times the volume of Y. The temperature of X is 327 °C and the temperature of Y is 27 °C. What is amount of substance in X over the amount of substance in Y? 24:25 | 13. An electromagnetic wave has a wavelength that is about the size of the diameter of an atom. What region of the electromagnetic spectrum does the wave belong to? 25:20 | 14. A particle undergoes simple harmonic motion of period T. At time t = 0 the particle is at its equilibrium position. What is t when the particle is at its greatest distance from the equilibrium position? 27:00 | 15. Diagram 1 shows the variation with position of the displacement of a standing wave formed on a string. Diagram 2 shows the variation with position of the displacement of a travelling wave moving to the right along a string. Points P, Q, R and S are points on the string. What is the phase difference between P and Q and the phase difference between R and S? 29:15 | 16. A mass of 0.25 kg hangs from a spring of spring constant 4.0 N m-1. What is the natural frequency of oscillation for this system? 30:45 | 17. Two long parallel wires P and Q are a distance d apart. They each carry a current. A magnetic force per unit length F acts on P due to Q. The distance between the wires is increased to 2d and the current in Q is decreased to I/2. 34:20 | 18. Planets X and Y orbit the same star. The average distance between planet X and the star is five times greater than the average distance between planet Y and the star. What is orbital period of planet X over the orbital period of planet Y? 36:15 | 19. A charged rod is brought near an initially neutral metal sphere without touching it. When the sphere is grounded (earthed), there is an electric current for a short time from the sphere to the ground. The ground connection is then removed. What are the charge on the rod and the charge induced on the sphere when the connection is removed? 37:55 | 20. A positive point charge of magnitude 1.0 mC and a point charge q are separated by a distance d. An electron is placed at a distance d from the +1.0 mC charge. The electric force on the electron is zero. What is q? 41:05 | 21. What is the sequence for the evolution of a main sequence star of about 2 solar masses? 42:05 | 22. The diagram shows the emission spectrum of an atom. Which of the following atomic energy level models can produce this spectrum? 42:55 | 23. Two radioactive samples X and Y have the same half-life. Initially the ratio activity of X over the activity of Y is 4. What is this ratio after 2 half-lives? 43:45 | 24. Three statements about a nuclear fission reactor are: Which statements about the reactor are correct? 45:10 | 25. The Hertzsprung-Russell diagram shows two stars, X and Y. What is radius of X over the radius of Y?

I thought u could use a calculator in paper 1 now or?

could you please leave a link to the question paper?

*When trying to find the fractional uncertainty, here is why we can "ignore" the constants in the area of the circle:* Suppose Q=αa where Q is some quantity dependent on a, α is a constant factor, a is the variable quantity, and Δa is the absolute uncertainty in a. The absolute uncertainty in Q is ΔQ=αΔa.When finding the fractional uncertainty, (ΔQ)/Q=(αΔa)/(αa)=(Δa)/a. Both Q and ΔQ are proportional to α. So, when we take their ratio, the α terms cancel out. Thus the ratio is independent of α.

This is total nonsense. The answer is a

My guy doing charity work fr 🎉. Staying tuned

More videos coming out ???

It’s not 4/pi ?? Isn’t that fractional uncertainty the uncertainty/value ?

I actually got it right then!!!

From where did you get the exam

Keep it up!!!

I chose B as a guess 😭

Isnt the fractional uncertainty of the circle 2d/(pie*(d^2/4)?

Thank you so much for posting!!!

te amo bro

te amo eres el mejor yutuber que conozco, infravalorado

Any chance for this year's paper 1 solving video?? Thanks!

couldn't have help us getting cooked by p1😍

Are you May 2024? paper 1 was horrible...

Thank you man

Good luck on your exams!

life saver....

one tip I feel is for paper 2 even if u dont understand the question or something write down the formula associated the questions atleast u will get a 1 rather than a 0

Please make tips for Math AA HL 🙏

Thank you for this

Ok so I was sick when I made this and only now am I realizing I was saying velocity... I actually mean volume. Whoops!

Quick clarification: III is incorrect because it is not causing the solar constant to vary with time.

another day... another slay

thank you! this was very useful