Corrections for Exam

1. When the velocity is changing then we use the area underneath the graph to measure the distance.
2. The thinking distance is the distance travelled by the moving vehicle in the driver's reaction time. One factor which increases this is alcohol.
3. The Braking distance is the distance travelled by the moving vehicle after the brakes have been applied. One factor which increases this is poor condition of tires.
4. Frequency is the number of waves per second.
5. In a series circuit, the voltage is shared and the current is the same. On a parellel circuit, the voltage remains the same and the current is shared.
6. The battery and resistor are two components which affect the size of the current, other than the bulb.
7. The potential difference=subtracting the overall supply voltage with the voltage read across ONE component.
8. When i>c you get total internal reflection
9. Diffractions for short waves are usually curved whereas for long waves they are curved around the corners only.