Recent content by n_otesguy

If the question is finding the direction of force acting on a current carrying loop in the presence of an external magnetic field then: Look at the bars perpendicular to the magnetic field. Use the right hand palm rule with the fingers pointing in the direction of the magnetic field and the...

In terms of a historical context, physicists at that stage had achieved to: Understand mechanics and the conservation principle Had come up with the links between electricity and magnetism. This was due to Maxwell's equations And had come up with the three laws of thermodynamics. Despite...

Use: Vorb = √(GM/r). M=6.6 x 10^23kg r= 3.4 x 10^6+300 x 10^3 G=6.673 x 10^-11 I get v=3450 m/s but you should check that I haven't typed in the wrong numbers in the calculator.

Use F=ma to work out the acceleration: 15=3a -> a=5 ms^-2 We know that the "final" speed doubles, and the initial speed is 8m/s, so using one of the equations of kinematics we have: v=u+at 16=8+5t t=8/5 s.

4)a) Discuss whether an American hair dryer would work in Australia? b) Explain how you could observe an AC output a) An American hair dryer will probably not work because the rating is usually not at 240VAC@50Hz. From memory they work at the frequency of 60Hz and have a different power socket...

The solutions are attached.

For the purpose of the HSC, it's just best to write it the long winded way because most teachers/markers go by the textbooks written for the HSC.

richiew, step (iv) is something that BOS likes...probably to show that you know what proof by induction is. But if you go onto uni maths, lecturers don't like you writing essays about what proof by induction is. They would only expect you to write (By induction 5<SUP>2n</SUP> - 1 is true for...

Ext 2 maths is a good starting point for engineering because the integration topic will overlap with a significant part of the calculus strand for mathematics while the mechanics topic will set you up for the first few lectures for physics. So I recommend you do Ext 2 maths if you're good at it...

I always enjoyed demonstrations and pracs in high school physics, because showing something (such as the creation of beakman's motor or use of eddy currents in braking) makes it much easier to understand the theory behind it all. Calculation questions are also good, except HSC physics tends...