A solar heat storage system contains a large block of concrete designed to store thermal energy during the day and release it at night to keep a greenhouse warm. Which combination of thermal capacity of the block and daytime temperature increase will store the greatest amount of thermal energy?
small thermal capacity of block, small daytime temperature increase
small thermal capacity of block, large daytime temperature increase
large thermal capacity of block, small daytime temperature increase
large thermal capacity of block, large daytime temperature increase
119 exam-style questions on CIE IGCSE Physics 2.2.2a Internal energy and temperature. Each one has a worked solution and a mark scheme showing where the marks go.