La transformación de la energía

The video explains how energy from the Sun is transformed through photosynthesis into chemical energy, which can be further transformed into kinetic, thermal, or electrical energy. It highlights the first law of thermodynamics, stating energy is neither created nor destroyed but transformed. The video discusses fuel efficiency in vehicles, noting that only a portion of chemical energy is converted into kinetic energy, with some lost as sound and heat. Efficiency is expressed as a percentage, and no device is 100% efficient, as energy waste occurs in all systems.

What process do plants use to convert sunlight into chemical energy?

• Photosynthesis

• Respiration

• Fermentation

• Combustion

According to the first law of thermodynamics, what happens to energy?

• It is created and destroyed

• It is only transformed

• It disappears

• It remains constant

What percentage of chemical energy from fuel is typically converted into kinetic energy in a motorcycle engine?

• 10%

• 20%

• 30%

• 50%

What is the term for the measure of useful energy output compared to total energy input?

• Power

• Efficiency

• Capacity

• Output

Why can't any device achieve 100% efficiency?

• Materials are not conductive

• Energy is destroyed

• Devices are poorly designed

• Energy is always lost as sound and heat