1 a) i) State the two types of errors [2marks] ii) Explain how to minimise the errors above [2marks] b) i) Define refraction of light [2marks] ii) A ray of light travelling through a liquid of absolute refractive index 1.4 is incident on the plane surface of a Perspex block at an angle of 55. Calculate the angle of refraction in the Perspex if it has an absolute refractive index 1.5 [4marks] c) i) Define the following Displacement Velocity Acceleration [3 marks] ii) A body of mass 50 kg initially moving at 20 m/s accelerates to a velocity of 30 m/s in 5 seconds. Calculate the force acting on the body. [3marks] d) A charge of quantity 910C flows through a conductor in 20 seconds, calculate the amount of current in the conductor [3marks] e) State Newton's laws of motion f) i) Obtain the effective resistance in the figure below 352 5 452 [3marks] ii) If a voltage of 12 V is applied across the arrangement, calculate the total current the circuit [3marks] [2marks] [3marks] g) Differentiate between heat capacity and specific heat capacity