%100 VERIFIED 2016 WAEC GCE PHYSICS OBJ AND ESSAY ANSWERS

========================== PHYSICS OBJ: 1-10: ADDCCCDBCA 11-20: DDCADBBCAB 21-30: BBDCDBABDC 31-40: ABABDDDDBD 41-50: AACDABDACD =====================

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  2)-Concentration of electrolyte -Nature of electrode -Positions of ions in the electrochemical series 4a -They are used in the fields of communications,

  4b -warfare -in exploring spac 5)-traveling wave tubes -Hall Effect sensors -high temperature-resistant permanent magnets -thin-film coating equipment 08167015961 -flywheel storage systems.

  9 )Boyle’s law state that a law stating that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature.

  9 bi) Renewable energy is energy generated from natural resources—such as sunlight, wind, rain, tides and geothermal

  9bii) rain wind Sunlight Geothermal

  10) states three different between sound and light waves

  Sound Waves 1. Require a medium. 2. Travel with a speed of 332 m/s at 0 C. 3. Are longitudinal waves consisting of compressions and rarefactions. 4. Are of different frequencies, giving notes of different pitches. 5. Do not travel far as their energy is dissipated easily.

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  *Light Waves* 1. Do not require a medium 2. Travel with a speed of 3 *10 8 m/s. 3. Are electromagnetic waves consisting of varying electric and magnetic wapbaze.com fields. 4. Are of different frequencies, resulting in different colors. 5. Can travel through a much greater distance.

  12a . decay constant is define as the instantaneous rate of decay per unit atom of a substance.

  12bii) Control rods are used for maintaining the desired state of fission reactions within a nuclear reactor (i.e. subcritical state, critical state, power changes) They constitute a key component of an emergency shutdown system (SCRAM) . Control rods are rods, plates, or tubes containing a neutron absorbing material (material with high absorbtion cross-section for thermal neutron) such as boron , hafnium, cadmium , etc., used to control the power of a nuclear reactor. By absorbing neutrons, a control rod prevents the neutrons from causing further fission

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