The food substance being used which turned Fehling's solution to brick red is a reducing sugar.
<h3>What is Fehling's solution?</h3>
This is an indicator which is used to test for the presence of reducing sugar or aldehydes in a solution.
Brick red precipitate of copper(I) oxide is formed when it tests positive to compounds such as glucose etc.
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Basically its just an air like fluid with chemicals.... just like air it just goes as it pleases and fills space
The light particle<span> conceived by Einstein is called a photon. The main point of his </span>light<span> quantum theory is the idea that </span>light's energy is related to its oscillation frequency. <span>Einstein believed </span>light<span> is a </span>particle<span> (photon) and the flow of photons is a </span>wave<span>.</span>
Is the component perpendicular to the surface on contact of the contact force <span />
D, I believe would be the first minus the second vector.
To solve this I named the first vector as A and the second as B.
So... vector A - B = resultant
or A + (-B)
A negative indicates a direction of a vector so if we flip the direction the other way we have the first vector (A) pointing vertically upwards and then vector B pointing to the west.
Now we have to use the head to tail method, meaning that the head of the first vector has to connect with the tail of the other vector added.
So we should have something like this
(-B) < - - - - ^
|
| (A)
|
To add these two vectors, technically A - B, draw a line from the tail of A to the head of -B which would look like image D.
Hope this helped!
