1. What wavelengths are associated with the light color observed in each metal’s flame test?
1 answer:
Answer:
Here's what I get
Step-by-step explanation:
1. Wavelengths
2. Identity of unknown
Don't know. You haven't told us its flame colour.
3. Light filters
You could probably filter lithium light. It is almost pure red.
The other elements emit light of mixed colours. It would be difficult to filter them with filters of a single wavelength.
4. Fireworks chemicals
For a red explosion followed by a green one, the engineer should use LiCl and CuCl₂.
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Answer:
Option D.
Step-by-step explanation:
It is given that, graph of j(x) transformed in the graph of j(4x) – 27.
We need to find the transformations.
Consider the new function is
... (1)
The translation is defined as
... (2)
Where, k is stretch factor, a is horizontal shift and b is vertical shift.
If 0<k<1, then the graph stretched horizontally by factor of 1/k and if k>1, then the graph compressed horizontally by factor of 1/k.
If a>0, then the graph shifts a units left and if a<0, then the graph shifts a units right.
If b>0, then the graph shifts b units up and if b<0, then the graph shifts b units down.
On comparing (1) and (2), we get
k=4>1, the graph j(x) compressed horizontally by factor of 1/4.
a=0, so there is no horizontal shift.
b=-27<0, so the graph of j(x) shifts 27 units down.
So, the required transformations are horizontal compression by a factor of 1/4, and a translation 27 units down.
Therefore, the correct option is D.