What are the advantages and disadvantages of using a solar cooker?

The calorific values of three fuels A, B and C are 33kJ/ g, 48kJ/ g and 150kJ/ g, respectively. A is solid, B is liquid and C is a gas at room temperature. One combustion, both A and B produce carbon dioxide while C explodes forming steam. B and C leave no residue after combustion while A leaves behind some solid residue. Which one of the three fuels is the most ideal? Give two reasons to support your answer.

Compare and contrast biomass and hydroelectricity as sources of energy.

What is nuclear fission? Explain with an example. Write the equation of the nuclear reaction involved.

How is charcoal prepared? Explain why, charcoal is a better fuel than wood.

What are the characteristics of an ideal fuel (or good fuel)?

What is a solar cell? Draw the labelled diagram of a solar cell.

What steps would you suggest to reduce energy consumption?

A large coal-fired power station produces 2000MW of electrical energy. A wind turbine with 33m blades can produce 300kW.

1. How many turbines would be needed to replace the power station?
2. Why, in actual practice, this number of turbines could not replace the coal-fired power station?

What is a source of energy? What are the two main categories of the sources of energy?