energy and change
DESCRIPTION
it is a 9 and 10 th presentation its good for people and i can wet you will get a1 if you download from here.TRANSCRIPT
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Ed Energy explains the five basic rules of Energy and Change
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Energy and Change: the basic five lawsLaw # 1. “An unbalanced force acting on a body results in a change in motion”.
What this means: the balancing scales will not move…until…we do what???
Apply a weight (an unbalanced force!)
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Energy and Change: the basic five lawsLaw # 2: Objects remain stationary or in constant motion under the influence of balanced forces
What this means: The wheel will continue to spin and spin and spin…until…what???
We unbalance it (here, with brakes). Note that, once it stops, the wheel is once again in balance.
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Energy and Change: the basic five lawsLaw # 3: Energy can be transferred from one medium to another.
What this means: When we heat the pot…what happens?
The energy from the fire is transferred to the water!
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Energy and Change: the basic five lawsLaw # 4: Transfers of energy can vary according to the medium in which it travels.
What this means: When you put a pencil into a glass of water…what happens?
Thanks to the refracting property of water, the pencil appears to be bent!
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Energy and Change: the basic five lawsLaw # 5: Energy is conserved when it is transferred or transformed
What this means: When you turn on a bulb, you get energy in the form of light, but you get what other form of energy as well?
Stumped? Then, do the experiment with your teacher!
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