IGCSE PHYSICS EXAM PREPARATION QUESTIONS AND ANSWERS.

IGCSE PHYSICS EXAM PREPARATION QUESTIONS AND ANSWERS. 2 cons of nuclear power? -Answer-1 - risk of meltdown 2 - difficulty with sorting waste 3 advantages of nuclear power? -Answer-1 - high energy density 2 - readily available for fluctuations in energy demand 3 - non-polluting 3 disadvantages of fossil fuels? -Answer-1 - limited supply 2 - greenhouse gases produced 3 - burning oil and coal releases sulfur dioxide which forms acid rain (expansive to extract from flue gases) 3 disadvantages of wind energy? -Answer-1 - seen as ugly 2 - noise pollution 3 - unreliable, vary with weather 4 ways to demagnetize? -Answer-1 - dropping a magnet 2 - heating a magnet 3 - use of alternating current in coil 4 - hammer a metal outside a magnetic field 4 ways to make a magnet? -Answer-1 - solenoids 2 - hammer a metal in a magnetic field 3 - stroke metal in one direction with one pole of magnet 4 - direct current in a coil Acceleration -Answer-change in velocity over time taken OR the rate of change of velocity Acceleration (a) -Answer-(v-u)/t Change in velocity (∆m/s) / time (s) Unit = m/s² According to IGCSE what type of wave are water waves? -Answer-Transverse (but they're actually a combination...) Alpha particle -Answer-a Helium nucleus Angle of Incidence (Degrees)= (for reflected light) -Answer-Angle of reflection (Degrees