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Wednesday 3 April 2013

PROGRAM MENCERAP BINTANG 2013

PROGRAM BERKENALAN DENGAN ILMU FALAK SEMPENA TAHUN SAINS & TEKNOLOGI 2013, SMSKP Bahagian Falak, Jabatan Mufti Pulau Pinang

2013 National Science Challenge - Preliminary Level

2013 NATIONAL SCIENCE CHALLENGE 9.30 - 11.30 AM ALL FORM 4 STUDENTS WERE INVOLVE THANK YOU FOR YOUR PARTICIPATION..

Monday 1 April 2013

ISU SAINS DAN TEKNOLOGI : Malaysia perlu sedia perancangan lebih teliti MALAYSIA bercadang mendapatkan tenaga elektrik daripada loji nuklear dan dua reaktor pertama dijadual beroperasi pada 2021. Namun, kejadian pencemaran radioaktif di Fukushima, Jepun dan isu penyimpanan sisa nadir bumi dari kilang Lynas di Kuantan mengubah pandangan masyarakat negara ini. Jika pihak berkaitan berjaya menangani isu Lynas, tugas memperkenal loji kuasa nuklear di Malaysia menjadi lebih mudah. Ketua Pengarah Agensi Nuklear Malaysia (Nuklear Malaysia), Dr Muhamad Lebai Juri, berkata selepas tragedi nuklear Fukushima Dai-ichi, penerimaan masyarakat terhadap teknologi itu berubah kepada isu keselamatan bahan radioaktif. “Isu Lynas juga berkaitan dengan pengurusan sisa buangan kerana orang ramai belum dapat diyakinkan dengan teknologi penyimpanan sedia ada,” katanya. Beliau berkata demikian dalam perbincangan bertajuk Penggunaan Tenaga Nuklear: Adakah Malaysia Bersedia Dari Segi Keselamatan sempena Seminar Tenaga Nuklear anjuran Majlis Profesor Negara. Nuklear Malaysia ditubuhkan pada 1972 untuk memulakan proses penjanaan kuasa nuklear sebagai sumber tenaga elektrik tetapi diabaikan selepas negara menemui minyak dan gas. Agensi itu kemudian bertukar sebagai institusi penyelidikan yang menggunakan aplikasi radiasi. Muhamad Lebai berkata, jika fungsi Nuklear Malaysia diubah daripada institusi penyelidikan kepada organisasi sokongan teknikal (TSO), agensi itu perlu berfungsi untuk meneroka nadir bumi seperti torium dan urainium. Nuklear Malaysia juga perlu membabitkan kepakarannya dalam kejuruteraan bahan api nuklear, teknologi reaktor dan pengurusan sisa radioaktif serta bahan api terpakai. Beliau berkata, program tenaga nuklear adalah satu industri yang besar kerana selain TSO untuk melakukan penyelidikan dan pembangunan, industri itu memerlukan industri kecil dan sederhana untuk mengeluarkan serta memproses semua komponen yang diperlukan dalam rantaian reaktor nuklear. “Ini bukan saja memerlukan kewangan yang besar tetapi juga memerlukan ramai graduan dalam bidang kejuruteraan nuklear dan fizik nuklear. “Kita tidak boleh bergantung pada universiti luar negara untuk melatih tenaga pakar ini tetapi institusi tempatan mesti memulakan program berkaitan. “Adakah kita bersedia?” katanya. Sumber : http : //www.bharian.com.my/

paper2 scheme physics sbp2007 mid year

PAPER2 SCHEME PHYSICS FORM4 SBP 2007 MID YEAR by ruslawati

paper1 scheme physics form4 sbp 2007 mid year

PAPER1 SCHEME PHYSICS SBP2007 MID YEAR by ruslawati

paper2 physics form4 sbp2007 mid year

PAPER 2 PHYSICS FORM4 SBP 2007 MID YEAR by ruslawati

paper1 physics form4 sbp 2007 mid year

PAPER 1 PHYSICS FORM4 SBP 2007 MID YEAR by ruslawati

Sunday 24 February 2013

MARKING SCHEME TRIAL PHYSICS SBP 2008

Marking Scheme Paper 1, 2 by ruslawati

TRIAL SPM PHYSICS PAPER 2 SBP 2008

Paper 2 Trial Spm Sbp 2008 by ruslawati

TRIAL SPM PHYSICS PAPER 3 SBP 2008

Paper 3 Trial Spm Sbp 2008 by ruslawati

MARKING SCHEME TRIAL PHYSICS SBP 2009

Marking Scheme Paper Trials Bps Pm 2009 by ruslawati

TRIAL SPM PHYSICS PAPER 2 SBP 2009

PHYSICSPAPER2TRIALSPMSBP20092.1 by ruslawati

TRIAL SPM PHYSICS PAPER 1 SBP 2009

Physics Paper 1 Trial Spm Sbp 2009 New2 by ruslawati

TRIAL SPM PHYSICS PAPER 3 SBP 2009

PHYSICSPAPER3TRIALSPMSBP20092.2 by ruslawati

MARKING SCHEME TRIAL PHYSICS PAPER 2 SBP 2011

Trial SPM_Fiz K2 Marking Scheme by ruslawati

MARKING SCHEME TRIAL PHYSICS PAPER 3 SBP 2011

Trial SPM_Fiz K3 Marking Scheme by ruslawati

MARKING SCHEME TRIAL PHYSICS PAPER 1 SBP 2011

Trial SPM_Fiz K1 Marking Scheme by ruslawati

TRIAL SPM PHYSICS PAPER 2 SBP 2011

Trial SPM_Fiz K2 SBP 2011 by ruslawati

TRIAL SPM PHYSICS PAPER 3 SBP 2011

Trial SPM_Fiz K3 SBP 2011 by ruslawati

TRIAL SPM PHYSICS PAPER 1 SBP 2011

Trial SPM_Fiz K1 SBP 2011 by ruslawati

Sunday 20 January 2013

2.1 : Linear Motion :     Motion along a straight line.

1.  Distance
  • The distance travelled by an object is the ______________ that is traveled by that object.
  • Distance is a ________________.
  • The SI unit of distance is ___________ .
2.  Displacement

  • Displacement of an object from a point of reference, O is the _____________ of the object from point O in a _____________ direction.
  • Displacement is a _____________ quantity.
  • The SI unit of displacement is _______________.


Distance
Displacement
Total path length travelled from one location to another
The distance between two location measured along the ______________ path connecting them in specific location

Scalar quantity
Vector quantity
Has magnitude only
Has magnitude and direction
SI unit meter
SI unit meter


   Speed

1.      Speed is defined as the …………………… travelled in a certain interval of time or the …………………............ of distance traveled with time.

                                         Speed = Distance traveled
                                                             Time taken

2.      The speed of an object is a ……………………… quantity. The SI units for speed is …………………..

 Velocity

1.      Velocity is defined as the …………………….. travelled in a given  interval of time in a ………………………………….. or the rate of change of …………………….. traveled with time.
                                         Velocity = Displacement
                                                            Time take
2.      The velocity of an object is a …………………….. quantity. The SI units for speed is ………………..

Acceleration

1.      Acceleration is defined as the rate of change of velocity.

                                   Acceleration = Change of velocity
                                                               Time taken
                                                     a = v - u
                                                              t
                                                     v - the final velocity
                                                     u – the initial velocity
                                                     t – the time taken

1.      The ticker timer as shown  in figure is used in the laboratory to study motion.
2.      It can print dots on a tape at a steady rate.
3.      It is connected to an a.c . power supply of 50 Hz.
4.      The time taken to make 50 dots on the ticker tape is 1 s. Hence , the time interval between 2 consecutive dots ( 1 tick) is 1/50 = 0.02 s.
Calculation involved ticker tape :

What is the speed of the trolley ?


The ticker-tape charts constructed with 5-tick lengths is shown in the Figure  above. What is the velocity of the trolley if the ticker-timer was connected to a 50 Hz power supply?










quotes of the day


Tuesday 15 January 2013

CHAPTER 2 : FORCE AND MOTION_ definition list


Linear Motion is the motion of an object in a straight line.

Kinematics is the study of the of motion objects without considering the forces that cause the motion of the object.

Distance is the total length of the path covered by a moving object.

Displacement is distance from one point to another in a particular direction.

Speed is rate of change of distance. Unit m s-1

Velocity is the rate of change of displacement.

Average speed is total distance moved divided by total time taken.

Average velocity is total displacement divided by total time taken.

Acceleration is rate of change of velocity. Unit m s-2
                                                                                                                       a = v - u
                                                                                                  t


Equations of linear motion with  uniform acceleration are as follows :
                                                      v = u + at

                                                     s = ut  + ½ at2

                                                   v2  =  u2  + 2 as       

Dynamics is the study of the motion and of the forces that cause the motion of that body.

Inertia is the resistance of an object to change of its motion. Inertia is non-physical quantity.

Mass of an object is the quantity of matter in that object.

Newton’s First Law of motion states, if no external force is acting on an object, it will, if stationary remain stationary, if moving keep moving at a steady speed in a straight line.

Momentum of an object is defined as a product of mass and its velocity. Unit kg m s-1
 p = mv

Principle of conservation of momentum states that when two or more objects act on each other, their total momentum remains constant, provided there are no external forces acting on the system. 
(m1u1 + m2u2 = m1v1 + m2v2)

Force acting on an object can cause changes to its size, shape, and state of rest, velocity, and direction of motion of the object.
 
Newton’s second law of motion states that force acting on an object is directly proportional to the rate of change momentum of the object in the same direction. F = ma

Impulse is the product of force and time for which the force acts during collision

Impulsive force is the force that acts on an object within a very short time such as during a collision.

                   F = mv – mu
                                t


Gravitational attractive force is the pull (force) of the earth on objects and it acts towards the centre of the earth

An object is in free fall when it falls under the influence of gravitational attractive force without the influence of other forces. (A free fall is situation whereby an object falls under the influence of gravitational attractive force only).

Gravitational acceleration is the acceleration of an object which falls freely.
Weight of an object is the gravitational force acting on it. Or
W = mg (m = mass, g = gravitational acceleration)
An object is in equilibrium if the resultant of forces acting on it is zero.
Newton’s Third Law of Motion states that for every force there is an opposite an equivalent  force against it.
A resultant force is a single force that represents in magnitude and direction two or more forces acting on an object.
Resolving a force is replacing a single force by a pair of perpendicular forces provided that the resultant of the two forces is equivalent to the single force.
Work done by constant force to move an object is equivalent to the product of the magnitude of its displacement and the components of the force, which is in the direction of the displacement.
W = F x s

Energy is defined as the capacity of a system to do work.
Gravitational Potential Energy is defined as energy obtained by an object due to its position.
                                                      Ep = W = Fs
                                                           = mg x h
                                                           = mgh

Elastic Potential Energy is defined as energy obtained by object due to its state (extension or compression)
                                                         Ep = ½ F x  

Kinetic Energy is defined as energy attained by an object due to its motion.
W = Ek = ½ m v2  

Conservation of Energy states that energy cannot be created nor destroyed but changes from one form to another.

Elasticity of a material is its ability to return to its original form and size when the force acting on it is removed.

Hooke’s law states that the extension of an elastic spring is directly proportional to the force acting on it provided that the limit of elasticity is not exceeded.

Spring constant is defined as force per unit extension of a spring.
A soft spring has a smaller k value whereas a stiff spring has a larger k value.


The work done when extending or compressing an elastic material is given by

The strength of a material is the ability of the material to withstand external forces before it breaks or snaps. Rattan is a strong but not rigid material. Concrete is both strong and rigid.

Rigidity is the ability of a material to withstand external forces acting on it without changing its size or shape. Glass is a rigid but not a strong material.

SIMPLE PENDULUM EXPERIMENT


  1. Inference :  When the length of a simple pendulum increases, the period of oscillation also increases. // The period of pendulum is affected by the length of the thread.

  1. Hypothesis :  The longer the length of a simple pendulum, the longer will be the period of oscillation
                           
      3.   Aim :  To find the relationship between the length of a simple pendulum and the period 
                       of oscillation.

      4.   Variable :  a) Manipulated variable : Length, l
               b) Responding variable  : Period, T.
               c)  Fixed variable            : Mass of pendulum bob. 

5.       Materials/ Apparatus : Retort stand, pendulum bob, thread, metre rule, stop watch.

 FUNCTIONAL DIAGRAM

7. Procedure     :
     a)  Set up the apparatus as shown in Figure above.// A small brass or
          bob was attached to the thread. The thread was held by a clamp of a
          the retort stand.
           
      b) The length of the thread , l  was measured by a metre rule, starting
           with 90.0 cm. The bob of the pendulum was displaced and released.

      c)  The time for 20 complete oscillations, t was taken using the stop
watch.  Calculate the period of oscillation by using, T = t / 20

      d) The experiment was repeated using different lengths such as
           80.0 cm. 70.0 cm, 60.0 cm, 50.0 cm and 40.0 cm.

Length of string, l / cm
Time taken for 10
oscillation, t (s)
Period of oscillation
T2
(s2 )

   t 1
  t 2
Average, t
40.0
50.0
60.0
70.0
80.0
90.0

25.2
28.1
31.0
33.5
35.7
38.2
25.1
28.2
31.0
33.6
35.9
37.9
25.2
28.2
31.0
33.6
35.8
38.1
1.26
1.41
1.55
1.68
1.79
1.91
1.59
1.99
2.40
2.82
3.20
3.65












8. Plotting the graph

Notes :

  a)   Plotting the graph

·         The graph should be labeled by a heading

·         All axes should be labeled  with quantities and their respective units.

·         The manipulated variable (l) should be plotted on the x-axis while the responding variable (T2 ) should be plotted on the y-axis

·         Odd scales such as 1:3,  1:7 , 1:9 0r 1 :11 should be avoided in plotting  graph.

·         Make sure that the transference of data from the table to the graph is accurate.

·         Draw the best straight line.
- the line that passes through most of the points plotted such that is balanced by the number of points above and below the straight line.

·         make sure that the size  of the graph  is large enough,  which is, not less than half the size of the graph paper or.(  > 8 cm x 10 cm )

10. Discussion / Precaution of the experiment / to improve the accuracy
                 
a)      The bob of the pendulum was displaced with a small  angle
b)      The amplitude of the oscillation  of a simple pendulum  is small.
c)      The simple pendulum oscillate in a vertical plane only.
d)      Switch off the fan to reduce the air resistance

    11. Conclusion
                 The  length of simple pendulum is directly  proportional  to
      the square of the period  of oscillation. //

      T2 is directly proportional to l  (the straight line graph passing
      through the origin)