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Illusion [34]
3 years ago
12

Which one is it? Please help

Chemistry
2 answers:
aivan3 [116]3 years ago
8 0

Answer:

Chemical properties can be tested without changing the substance

Explanation:

GuDViN [60]3 years ago
5 0
Chemical properties can only be tested if you change the substance
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The correct answer is D . Milk
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3 years ago
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A grating has 470 lines/mm. how many orders of the visible wavelength 538 nm can it produce in addition to the m = 0 order?
maria [59]

Three complete orders on each side of the m=0 order can be produced in addition to the m = 0 order.

The ruling separation is

d=1 / (470mm −1) = 2.1×10⁻³ mm

Diffraction lines occur at angles θ such that dsinθ=mλ, where λ is the wavelength and m is an integer.

Notice that for a given order, the line associated with a long wavelength is produced at a greater angle than the line associated with a shorter wavelength.

We take λ to be the longest wavelength in the visible spectrum (538nm) and find the greatest integer value of m such that θ is less than 90°.

That is, find the greatest integer value of m for which mλ<d.

since  d / λ = 538×10⁻⁹m / 2.1×10 −6 m ≈ 3

that value is m=3.

There are three complete orders on each side of the m=0 order.

The second and third orders overlap.

Learn more about diffraction here : brainly.com/question/16749356

#SPJ4

7 0
2 years ago
PLEASE HELP ME WITH THIS!!! Due in 20 minutes
grin007 [14]

4. Elements in the same group on the periodic table have the same number of valence electrons.

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5 0
4 years ago
How does reducing the use of packaging and other materials conserve resources
Basile [38]
We would be using less natrual resources in both the packaging and process of making the packaging, which includes:

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8 0
3 years ago
In nematode worms, a gene that codes for an ATPase has two alternatives for exon 4 and three alternatives for exon 7. How many d
Artyom0805 [142]

Answer:

6 different forms of the protein could be made.

Explanation:

For the given nematode worm, 6 different forms of the protein could be made. This is because of the alternative splicing that will produce 6 kinds of mRNAs. We have 2 different forms for the exon 4 while we have 3 differen forms for the exon 7. Therefore, we have a total of (2*3) 6 different forms of the protein for the given nematode worm.

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4 years ago
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