Question 1: Define what is meant by 'trend in use' when referring to energy resources.

Answer: A pattern or general direction in which the usage of an energy resource increases, decreases, or remains stable over a period of time.

Question 2: Explain why monitoring trends in energy resource use is important for sustainable development.

Answer: It helps identify increasing or decreasing consumption patterns, allowing for better planning, conservation, and development of alternative resources to ensure long-term energy availability.

Question 1: If the use of coal increased from 500 million tons in 2010 to 650 million tons in 2020, calculate the average annual increase in coal usage (in million tons per year). Use the formula: (Final amount - Initial amount) / Number of years.

Answer: 15 million tons per year

Question 2: A country’s renewable energy consumption grew from 20% to 35% of total energy use over 5 years. Calculate the percentage increase in renewable energy usage. Use the formula: ((New percentage - Old percentage)/Old percentage) * 100.

Answer: 75%

Question 1: Describe a simple experimental setup to measure the rate of energy consumption of a home appliance. Include variables to control and safety precautions.

Answer: A setup could include an energy meter connected to the appliance to record power usage over time. Variables to control include appliance settings, voltage, and environment. Safety precautions involve ensuring proper electrical connections, avoiding water contact, and disconnecting devices before handling wires.

Question 1: A report states that global energy consumption increased by 2% annually over a decade. If the initial consumption was 14,000 exajoules in 2010, what is the estimated consumption in 2020? Use the compound interest formula: Final = Initial * (1 + rate)^years.

Answer: Approximately 17,036 exajoules

Question 1: Discuss the impact of increasing reliance on renewable energy sources on the trend of energy use in industries. Include at least two positive effects.

Answer: Increased reliance on renewable energy sources can lead to a reduction in greenhouse gas emissions, helping combat climate change. It also promotes sustainable development and can reduce dependence on finite fossil fuels, ensuring long-term energy availability for industries.