The law of conservation of energy is a physical law that states energy cannot be created or destroyed but may be changed from one form to another. Another way of stating this law of chemistry is to say the total energy of an isolated system remains constant or is conserved within a given frame of reference.
In classical mechanics, conservation of mass and conversation of energy are considered to be two separate laws. However, in special relativity, matter may be converted into energy and vice versa, according to the famous equation E = mc2. Thus, it's more appropriate to say mass-energy is conserved.
Example of Conservation of Energy
If a stick of dynamite explodes, for example, the chemical energy contained within the dynamite changes into kinetic energy, heat, and light. If all this energy is added together, it will equal the starting chemical energy value.
Answer:
The product of the two numbers is 2.33* 10^13
Explanation:
Given
4.31x10⁷ and 5.41x10⁵
Required
Multiply
The multiplication of the two digits is represented as thus:
This can also be rewritten as
Multiply 4.31 and 5.41
Apply laws of indices
The scientific notation is always in the form:
Where
So:
23.3171 can be rewritten as 2.33171 * 10
So, we have:
Also, apply law of indices again
It's always advisable (but not compulsory to approximate to 1 or 2 decimal places)
So:
<em>Hence; the product of the two numbers is 2.33* 10^13</em>
Answer:
Medium 1 is air and Medium 2 is water because the light slows down.
Explanation:
Light is known to slow down in water since water is denser than air.