Energy Smart

luv2cheer asked:


1. The law of conservation of energy states that energy is neither created nor destroyed. What does this mean?

2. Why is the conservation of energy so important?

Please Help!!!

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sterv asked:


A horizontal BB gun 2.75 m off the ground fires a pebble of mass m at a horizontal velocity of 12 m/s. (a) Use energy conservation to determine the speed of the BB when it hits the ground (b) Use projectile methods to determine how far away the ball landed from the shooter.

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bornonwednesday asked:


What’s a fun quick game or activity that can be used to teach kids the importance of energy conservation?
Thanks.

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Gag G asked:


Give some examples of each.

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15fsg546rge1rrheljh45hjr90459ty3 asked:


Rather than pour all our money into energy exploration, new energy sources, technology, etc.; is it cheaper to make us all able to see in the dark? We have night vision technology, and medical and genetic technology has increased substantially over the past few years. Has anyone done any experimentation with lab rats to see if they can be altered to be able to see in the dark? Would this be cost effective if, rather than light the planet, we could get everyone to see in the dark. Yes, this sounds ridiculous, but the goals required to achieve energy conservation, and reduce greenhouse gases are pretty much in the air still. Is this probable?

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ninebadthings asked:


Is it possible to extract a quantity of hydrogen from water with a greater potential energy than that of the amount of energy in the electricity used to produce it?

Seems to me conservation of energy is always going to be the spoiler.

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Greywolf asked:


Average middle income family living in the boondocks. Where do I learn more about how to do it? Can I do it in stages? How many do I need for my size house? Do I have to put solar panels on my roof? or a big solar panel form in my yard? Are they strong enough to survive severe storms and hail?

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asked:


I’m very confused here. The law of conservation of energy states that energy isn’t lost and can’t be destroyed. However, the 2nd law of thermodynamics states that the universe is running out of energy. help!

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