Energy Smart

Aakash_saphire asked:


make sure that it is simple that can be made in a day and easy

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gokart121 asked:


If everyone in america reduced their fuel use by 30% annually, would that make a difference?
I wish the Big 3 would re-release a simple, all-manual, no-frills 4-banger pickup with a 5-speed manual trans. Heavy springs and stiff frame/good brakes give you payload carrying capacity, the 4-banger and the 5-speed gearset give you an economical way to move it from A to B. Buuuut, all the shitboxes they’ve sold as ‘pickups’ for the last 10 years all have an insanely high GVW, fuel-swilling engines, and every option known to man including some that only belong on the shuttle. Over-marketed crap still doesn’t get to the zone of real economical operation, there’s trade-offs in life, I can’t wait until Mazda or somebody builds such a truck in the US and makes it run on hydrogen(which can be made, like, at the coast, for relatively cheap, truth be known). But, the Big 3 will change…in a pig’s ass, maybe…shoes are still 100% energy-efficient…

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Pythagor asked:


Hello,

I have got a problem which is described below.

A heavy metal ball starts to fall from 1 meter height, ant this ball hits a light tennis-ball on the table. After the hit, metall ball rises nearly to 1 meter height. To what height does a light tennis-ball rise?

In my opinion, energy conservation law should be used here. But then it means that the tennis-ball nearly don’t rise, and as I suppose, it is not a logical answer.

Could anyone help me with this problem?

Thanks in advance.
This is a problem where masses can’t be measured.

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kmm4864990 asked:


That is, initially the rock has a high potential energy. Then, its energy is converted into kinetic energy as it falls. So i understand energy is merely changing form.

But then it hits the ground. The rock ceases moving at a relative height of zero. Into what form was the enrgy converted? Is it converted into kinetic enrgy that travels through the particles of the ground? Thanks a lot!

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Bob B asked:


Use the conservation of energy and momentum to show that pair annihilation CANNOT produce only on photon.

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~Fefi~ asked:


How are the laws of conservation of momentum and energy similar?

Here are the formulas:

Law of conservation of momentum:

P1 + P2= P1′ P2′

m1 v2 + m2 v2 = m1′ v1′ + m2′ v2′

Law of conservation of Energy:

KEi + PEi = KEf + PEf
I think that the energy can’t be created nor distroyed but it can be transformed from one form to another.
But is that the similarity???

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Naomi asked:


I mean, how would they encouraged to follow without them feeling forced? Thanks!

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lost_in_transit326 asked:


I live in New York and have been doing some research on the Governor, but I cannot seem to find anything on his environmental policy.

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Jack Jeebs asked:


If light bounces off of a mirror, shouldn’t there be an equal and opposite reaction to the force, giving the mirror some energy, and the light will lose some velocity…. but then light is always moving at the speed of light so how is it compensated? Will the photon just pull energy out of nowhere and continue at the speed of light?

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vhersz asked:


applying the law of conservation, why are we ask to save energy and use it wisely?

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