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    Multiple Choice

    How about the indicator question ? How to do that ? I got C but apparently its D
  2. N

    Multiple Choice

    I thought the Cl have more priority over F since the alphabetical order. So I put D.
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    What are you going to do the moment you finish your HSC ?

    one year not playing LoL. can't wait
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    Trapped gas bubbles in ice-cores in Antarctica.

    I am confused as to whether other oxides of nitrogen and sulfur is also present int the Antarctic ice-core drilling's findings. I thought only carbon dioxide was involved. Some sample answers related this to oxides of nitrogen and sulfur. I am confused. Can anyone clarify whether oxides of N and...
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    General Thoughts: Physics

    Has anyone ever got 100 for physics or any science subjects ?
  6. N

    Has anyone came across this dot point in the far right column- production of material

    process information from secondary sources to summarise the processes involved in the industrial production of ethanol from sugar cane.
  7. N

    General Thoughts: Physics

    I got the same. I used v^2 = u^2 +2as and then use pythagoras.
  8. N

    Anyone up for a Astrophysics Marathon?

    White dwarfs have a solar mass of less than 1.4 (Chandrasekar Limit). This means that the electron degeneracy pressure can hold back its gravitational collapse, causing it to be more denser and no longer undergoes fusion reaction. Correct me if I am wrong.
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    Anyone up for a Astrophysics Marathon?

    When a newly formed protostar acquires an equilibrium such that its gravitational collapse is balanced by an outward pressure from the heat by its core. The protostar then accretes more material from the cloud surrounding it which then blows off the rest to reveal itself which was previously...
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    Physics marathon (hsc)

    Prediction for an 8/7 marker ?
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    Projectile motion on Ideas to Implementation question.

    Thank you. I checked the marking guidelines now and they seem to have a reference to horizontal component of the velocity. Can you have a look at that too? Thanks again.
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    Projectile motion on Ideas to Implementation question.

    That's how I done it, but the sample answers uses somehow horizontal component of the velocity and their answer is 2.9x10^-8 seconds.
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    Projectile motion on Ideas to Implementation question.

    This is from 2009. I don't get it why they use horizontal component instead of vertical. Can someone explain part b ?
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    Physics marathon (hsc)

    A 1.0 W beam of light transfers 1.0 J per second from one point to another. With reference to the particle model of light, contrast a 1.0 W beam of red light and a 1.0 W beam of blue light. 2 marks (2011)
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    Physics marathon (hsc)

    This image is good.
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    What does the 85 raw mark scale to?

    92-93 according to 2010 and 2009. Depends this year.
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    Physics marathon (hsc)

    Impulse you mean ?
  18. N

    Physics marathon (hsc)

    This question came up in my trial: With an aid of a diagram or otherwise, explain how a solar cell works. (5marks)
  19. N

    Physics marathon (hsc)

    Explain how J.J Thompson calculated the charge to mass ratio of the cathode rays (3/4 marks)
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    Anyone up for a Shipwrecks Marathon?

    The early ships contained iron as the main metal for most of its counterparts. Due to the fact that aquatic environment are salty, it accelerate the process or rusting. This meant that the iron in ships were rusting overtime and incapable of lasting a long time at the marine environment. By the...
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