A unique type of basketball is played on the planet Zarth. During the game, a player flies above the basket and drops the ball in from a height of 10m. If the ball takes 5.0s to fall, find the acceleration due to gravity on Zarth.

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to

State the below theories and give the name of the writer of the theory 1. wave theory 2. quantum theory 3. corpuscular theory 4. electromagnetic theory