- It takes 4200 Joules to heat up 1 kg of water by 1 C^o. If you have a kettle with a power of 2500 Watts, how long will it takes to boil 0.8 kg of water from an initial temperature of 25 C^o to the nearest second??
- What is refraction?
- Explain the difference between current and voltage
- What is the difference between longditudinal and transverse waves?
- Name and describe both of Kirchhoff's laws.