SS3 Physics 1st Term

1. Which of the following statements is an advantage of nuclear fusion over nuclear fission? 2005, Q45

2. Which of the following statements about boiling and evaporation at atmospheric pressure is correct? 2005, Q23

3. Two capacitors of capacitance 0.4 uF and 0.5 uF are connected in parallel and charged to a P.D. of 50 V. Determine the total charge acquired. 2005, Q34

4. A body of mass 25 kg, moving at 3 ms^-1 on a rough horizontal floor is brought to rest after sliding a distance of 2.50 m on the floor. Calculate the coefficient of sliding friction. [g = 10 ms^-2] 2005, Q5

5. A chemical cell of internal resistance 1 ? supplies electric current to an external resistor of resistance 3 ?. Calculate the efficiency of the cell. 2005, Q36

6. Each of the following physical quantities is classified as a vector or a scalar quantity. Which of the classifications is correct? 2005, Q2

7. Fuel was consumed at a steady rate of 5.0 x 10^-2 kg per second in a rocket engine and ejected as a gas with a speed of 4 x 10³ ms^-1. Determine the thrust on the rocket. 2005, Q15

8. An electric motor is a machine that converts —2005, Q43

9. A process by which two light atoms join to form a new atom of higher atomic mass is —2005, Q47

10. A ray of light incident normally on a plane mirror. If the incident ray is kept fixed while the mirror is rotated through an angle of 30? C, determine the initial and final angles of reflection respectively. 2005, Q31