Can you tell ?
(a) When can we say that displacement has taken place?
(b) What should be taken into account for measuring work?
(c) What are the various forms of energy?
(d) Describe one natural chain of transformation of energy.
(e) Why should we save energy?
(f) What is ‘green energy’?
(g) What are the non-conventional energy resources?
(h) Which forms of energy from the sun are used in solar energy devices?
(i) Why should we maximise the use of non-conventional energy resources?
Answers
Answered by
31
a) When work is done by force then we can say that displacement has taken place.
(b) To measure work the force to do work and the amount of displacement should be taken into account.
(c) Gravitational Energy, Chemical energy, nuclear energy, elastic energy, motion energy, thermal energy, sound energy, electromagnetic radiation, electric
(d) Our body converts the chemical energy from the food into mechanical energy to move.
(e) Saving energy saves fuel as most of the case the natural fuels are used and they are going to extinct.
(f) Green energy is natural source of energy that comes from sunlight, rain, wind, plants, tides, geothermal heat and algae.
(g) Non-conventional energy resources are solar energy, wind energy, tidal energy, geothermal energy, biomass based energy, biogas, petro plants, dendrothermal energy, baggasse-based plants and energy from urban waste.
(h) Light and Heat energies from sun are used in solar energy devices.
(i) These sources are infinite sources and also natural and restorable unlike the natural fuels.
(b) To measure work the force to do work and the amount of displacement should be taken into account.
(c) Gravitational Energy, Chemical energy, nuclear energy, elastic energy, motion energy, thermal energy, sound energy, electromagnetic radiation, electric
(d) Our body converts the chemical energy from the food into mechanical energy to move.
(e) Saving energy saves fuel as most of the case the natural fuels are used and they are going to extinct.
(f) Green energy is natural source of energy that comes from sunlight, rain, wind, plants, tides, geothermal heat and algae.
(g) Non-conventional energy resources are solar energy, wind energy, tidal energy, geothermal energy, biomass based energy, biogas, petro plants, dendrothermal energy, baggasse-based plants and energy from urban waste.
(h) Light and Heat energies from sun are used in solar energy devices.
(i) These sources are infinite sources and also natural and restorable unlike the natural fuels.
Answered by
9
displacement has taken place when and object has changed its position with respect to time.
for measuring work force should b applied on the body and it should displace.
various forms of energy are kinetic energy, mechanical energy, potential energy, muscular energy, nuclear energy, light enegry, wind energy etc
when an object is at some height and is at rest and then falls from a height , potential energy changes into kinetic energy.
energy should b saves because it is limited source.
green energy is that energy is that which can b used as energy but it does not harm the environment.
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