Which material is commonly used in the construction of solar cells?

The best locations for wind farms are typically:

Which of the following is an example of liquid biomass fuel?

In a hydroelectric power plant, the potential energy of stored water is converted into:

The extraction of fossil fuels can lead to:

Solar water heaters work by:

Which of the following is a form of thermal energy storage?

A major advantage of tidal energy is:

The use of smart meters in homes contributes to energy efficiency by:

Which of the following is a byproduct of nuclear energy production?

Concentrated solar power (CSP) systems generate electricity by:

The capacity factor of a wind turbine refers to:

Which process converts biomass into a gas that can be used for energy?

Run-of-the-river hydroelectric systems are different from conventional dams because they:

Which of the following renewable energy sources is dependent on weather conditions?

Enhanced geothermal systems (EGS) differ from traditional geothermal systems by:

Which of the following home improvements can significantly reduce energy consumption?

The main purpose of a solar tracker is to:

A major environmental concern associated with wind farms is:

Which of the following technologies can reduce the environmental impact of burning fossil fuels?

A wind turbine with a rotor diameter of 60 meters operates in an area with an average wind speed of 8 m/s. Calculate the kinetic energy of the wind passing through the rotor per second. (Use the air density ρ = 1.2 kg/m³)

A household installs a solar panel system with a peak power of 5 kW. If the average solar insolation (sunlight) is 4 kWh/m²/day and the system operates at 75% efficiency, calculate the total energy produced per day in kilowatt-hours (kWh).

A biomass power plant burns 10,000 kg of wood per day, and the calorific value of wood is 18 MJ/kg. If the efficiency of the power plant is 25%, calculate the total energy output per day in megajoules (MJ).

A hydroelectric dam has a reservoir with a water flow rate of 600 cubic meters per second and a height of 120 meters. If the efficiency of the power generation is 85%, calculate the power output in megawatts (MW). (Use g = 9.8 m/s² for gravitational acceleration and the density of water = 1000 kg/m³)

An old refrigerator consumes 150 watts of power and runs for 24 hours a day. Calculate its annual energy consumption in kilowatt-hours (kWh).