The correct option would be A. solar. We also use solar energy to produce electricity.

Explanation: The sun is the primary source that drives global climate.

The sun produces energy from a method called nuclear fusion. During nuclear fusion, the immense pressure and temperature in the sun’s core make nuclei distinct from their electrons. Hydrogen nuclei combine and generate one helium atom.

Question : Sun is the only source of energy for all the ecosystems on Earth , except. Sun is the only source of energy for all the ecosystems on Earth, except deep sea hydro-thermal ecosystem.

Hey, The sun is called the ultimate source of energy because it is the source of almost all energise of the earth. -» Plants make food using sunlight, the food that we get from plants and animals also has its prime source as sunlight.

The energy stored in coal and oil started from the Sun, because coal and oil started as plants and animals. Plants use the Sun’s energy in a process called photosynthesis to create sugars to store as food. After millions of years, they become coal and oil. But they still store most of that original energy from the Sun.

We are facing a global energy crisis caused by world population growth, an escalating increase in demand, and continued dependence on fossil-based fuels for generation. The first section provides an overview of the nature of the global energy crisis approached from historical, political, and sociocultural perspectives.

What Uses the Most Energy in Your Home?

• Cooling and heating: 47% of energy use.
• Water heater: 14% of energy use.
• Washer and dryer: 13% of energy use.
• Lighting: 12% of energy use.
• Refrigerator: 4% of energy use.
• Electric oven: 3-4% of energy use.
• TV, DVD, cable box: 3% of energy use.
• Dishwasher: 2% of energy use.

It is computed Input Power minus output power. For example you have a PC power supply for your computer. You can measure the input power by taking AC measurements, say 1A at 120VAC = 120 Watts. The wasted power is 120W – 102 W = 18 W.

Calculating efficiency

1. The efficiency of a device, such as a lamp, can be calculated:
2. efficiency = useful energy out ÷ total energy in (for a decimal efficiency)
3. or.
4. efficiency = (useful energy out ÷ total energy in) × 100 (for a percentage efficiency)

useful output energy refers to the useful energy that is transferred by the device (eg thermal energy by a heater) input energy refers to the total energy supplied to a device.

Tools, appliances, vehicles and machines all provide useful energy outputs. Some of the energy is wasted or lost. The useful output is therefore less than the input energy as some of the output energy is wasted. An example is a light bulb where the input is electricity and the useful output is light.

The energy transfer to light energy is the useful transfer. The rest is ‘wasted’. It is eventually transferred to the surroundings, making them warmer. This ‘wasted’ energy eventually becomes so spread out that it becomes very difficult to do anything useful with it.

We divide our energy use among four economic sectors: residential, commercial, transportation, and industrial. Heating and cooling our homes, lighting office buildings, driving cars and moving freight, and manufacturing the products we rely on in our daily lives are all functions that require energy.

The world’s most used energy sources

• Oil – 39% Accounting for approximately 39% of the global energy consumption, oil has historically been the world’s most used energy source.
• Gas – 22% Gas consumption grew at an average rate of 2.4% in the last ten years.
• Nuclear energy – 4.4%

10 Household Items That Use More Energy Than You Think

• Clothing iron. Ironing your clothes may not take much of your energy, but the iron itself will use around 1,200 watts per hour.
• Hair dryer.
• Humidifier.
• Toaster oven.
• Coffee maker.
• Vacuum cleaner.
• Microwave.
• Dishwasher.

Energy is an essential part of our daily lives! We use energy to heat and cool our homes, schools, and businesses. We use energy for lights and appliances. Energy makes our vehicles go, planes fly, boats sail, and machines run. All living things need energy too.

When we talk about residential uses of energy, these are the most basic uses of energy. They include watching television, washing clothes, heating and lighting the home, taking a shower, working from home on your laptop or computer, running appliances and cooking.

When we go for a run we are using chemical energy in our bodies to produce movement (kinetic energy), which in turn converts to warmth (thermal energy).