Explain the process of nuclear fusion in the Sun.
In the Sun the main fusion process is the fusion of hydrogen nuclei to form helium nuclei. Any two hydrogen nuclei repel each other as they are both positively charged, for the fusion to occur the two nuclei need to get close enough together so that this repulsion is overcome. This is achieved by the high temperature and pressure in the core of the Sun. The total mass of the products is less than the total mass of the reactants, the mass difference is released as energy, given by the equation E = mc2.
JA
Related Physics GCSE answers
All answers ▸Describe how making a saucepan black and adding fins will help heat food up faster
An apple is suspended a string and a spring in parallel. When the string is cut, the apple falls, and the spring stretches and contracts repeatedly as the apple bounces. Describe the energy conversions that occur during this process.
A van of mass 2150kg with a driving force of 10,000 is accelerating at 3 m/s^2. Find the resultant force acting in the van, and also the frictional force on the van.
The cyclist used the brakes to slow down and stop the bicycle. A constant braking force of 140 N stopped the bicycle in a distance of 24 m. Calculate the work done by the braking force to stop the bicycle. Give the unit. (3 Marks)