A typical question is about energy transfer - Explain the process of convection and give an example of where we can find them
Molecules in the air encounter an energy source, they gain energy and begin to heat up which causes them to vibrate faster and become less dense which causes them to rise. As they rise, they begin to lose energy, move slower and become more dense which causes them to drop again. This process is repeated.Convection currents are found in the mantle below the Earth's crust and in some kitchen appliances.
MM
Related Physics GCSE answers
All answers ▸Please describe the structure of atom, with reference to the relative mass and charge.
Car 1 has a of mass 1000kg and is going at 20m/s. Car 2 has the same mass as Car 1 and is stationary. If they collide and travel together as one unit in the same direction as Car 1 was going, calculate the speed of the unit after the collision.
Give two features of polar orbits. Suggest the use of a satellite in a polar orbit.
Describe the purpose of the moderator in a nuclear fission reactor.