Describe how useful energy may be obtained from natural resources.

Useful energy is obtained from natural resources through various processes. For example:

  • Fossil fuels like coal, oil, and natural gas are burned to produce heat, which is then converted into mechanical energy or electricity.
  • Solar energy is harnessed through solar panels to produce electricity or heat.
  • Wind energy is converted into electricity using wind turbines.
  • Hydroelectric energy is generated by harnessing the energy of flowing water to turn turbines.
  • Geothermal energy is derived from the Earth’s internal heat.

Related Questions:

  1. Define work and its unit. Describe the conditions for maximum and minimum work.
  2. What is kinetic energy? Derive its expression using graphical analysis.
  3. What is potential energy? What are its different types? Show that gravitational potential energy is equal to the product of mass ‘m’, gravitational field strength ‘g’, and height ‘h’.
  4. What is meant by energy conversion and energy conservation?
  5. Dynamics-1
  6. Dynamics-II
  7. Pressure and Deformation in Solids
  8. Work and Energy
  9. Density and Temperature
  10. Magnetism
  11. Work and Energy
  12. A car is moving with a constant speed along a straight road. Is there any work done on the car?
  13. Does the work done in raising a box up in a building depend upon how fast it is raised up? Through which path? To how much height?
  14. Work done on a body either speeds it up or slows it down. Keeping this in mind, explain how much work is done by centripetal force on an orbiting satellite?
  15. A car has kinetic energy ‘Eₖ’. By what factor would its kinetic energy change if its velocity is doubled?
  16. A bullet is fired from a gun, penetrates into a sand wall, and stops. Where does its kinetic energy go?
  17. How does using renewable energy sources contribute to reducing environmental impact compared to non-renewable sources?
  18. Will we eventually rely entirely on renewable energy sources? Why or why not?
  19. How can increasing the power of a machine impact its energy consumption?
  20. A perpetual engine has an efficiency equal to 1. Why will it not work?