# King Thando Mathe

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11

1. ## Doppler Effect In Sound

The Doppler Effect is accounting for relative movements of source and observer at constant velocity meaning changes in frequency are sudden but remain constant. Now can we also have source and observer moving at accellarations and frequencies changing at certain rates?

ok
3. ## Circular motion

A small bead of mass m is threaded on to a smoth circular wire of radius r and centre O fixed in the vertical plane.Bead is projected with speed u from its highest point, A, of the wire.Find the reaction on the bead due to the wire when at P,in terms of m,g,r,u and ￦;where ￦ is the acute angle AOP.
4. ## Bug on a Band

It will never reach the end Uf=Ui=1m/s for the band's end because we assume constant rates
5. ## LR puzzle

Every 2 seconds it makes a progress of 1ft.Thus 60.But isnt ther a Mathematical model or progression we can model for that
6. ## !!!!MOMENTUM COLLISION INELASTIC AND ELASTIC HELP!!!!

The momentum and KE are shared between the two bodies in any collision.But in the 'idealised' situation of perfectly elastic collisions,the approaching mass will donate all its KE to the other body or will impart some.The basic rule z ENERGY WILL NOG BE LOST AS OTHER FORMS.A body can thus continue to move (or after rebound) with a reduced velocity because it has shared its KE. The momentum and KE are shared between the two bodies in any collision.But in the 'idealised' situation of perfectly elastic collisions,the approaching mass will donate all its KE to the other body or will impart some.The basic rule z ENERGY WILL NOG BE LOST AS OTHER FORMS.A body can thus continue to move (or after rebound) with a reduced velocity because it has shared its KE.
7. ## Transfer of momentum problem

1)Working from tbe momentum eqtn will certainly have you assume that velocity of A is 0 after collision.Thus Pa will become equal to Pb and a ratio of 1 which therefore is less than 2. 2)Working from the conservation of Kinetic Energy,will Pa/Pb=Vb/Va.Vb cannot be twice Va[ That we all know] since Vb is influenced by Va. 3)One can also create: Pa = [-(Pa-Pb)] + Pb This will lead to Pa=Pb again.If one does not want to apply that A is stationary after collision then Pa after collision can be regarded as [-(Pa-Pb)].But thesevis somehow bizzarre.
8. ## Special Relativity

How does the experience of time differ for observers moving at different velocities (that approaching c)
9. ## Amateur pyrotechnics experiment: Puzzling results

Greater force was required to break up the tape,bearing in mind the pressure build up as well.This results in a greater amount of air being pushed outwards (expanding) and leads to louder sound since sound comes from rarefaction and contraction of air molecules! bang
10. ## Telepathy closer to becoming reality after rats’ brains ‘linked’ across continents

Thus spying of ideas of war,technology etc will bevome possible.With exponential advance as always happens with Science and Tech even "stealing of ideas" would be rife.This in turn will lead to social conflicts at community scale,academic environments even global scale.
11. ## Would it be possible to sustain life without electromagnetic waves?

Our bodies also have an electromagnetic feild around it
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