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makkiz [27]
3 years ago
10

Which statement best describes how an X-ray telescope detects a

Chemistry
1 answer:
noname [10]3 years ago
8 0

Answer:

D. The telescope detects high-energy electromagnetic waves.

Explanation:

First of all, let's define what X-rays are.

X-rays are electromagnetic waves at high frequency and short wavelength.

The wavelength of X-rays span between 0.01 and 10 nanometers. X-rays are the second-highest frequency electromagnetic waves, after gamma rays, which have higher frequency.

The energy of an electromagnetic wave is directly proportional to its frequency, according to the equation:

E=hf

where:

h is the Planck constant

f is the frequency of the wave

Since X-rays are high-frequency electromagnetic waves, it means that they also are high-energy electromagnetic waves.

Therefore, the correct answer is

D. The telescope detects high-energy electromagnetic waves.

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A chemical reaction occurs when a solution is formed. True or false
Zolol [24]

Your answer would be False

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3 years ago
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A person tries to heat up her bath water by adding 5.0 l of water at 80c to 60 l of water at 30c. what is the final temperature
Sophie [7]
We can calculate the final temperature from this formula :

when Tf = (V1* T1) +(V2* T2) / (V1+ V2)

when V1 is the first volume of water = 5 L 

and V2 is the second  volume of water = 60 L

and T1 is the first temperature of water in Kelvin = 80 °C +273 = 353 K

and T2 is the second temperature of water in Kelvin =  30°C + 273= 303 K

and Tf is the final temperature of water in Kelvin 

so, by substitution:

Tf = (5 L * 353 K ) + ( 60 L * 303 K) / ( 5 L + 60 L)

     = 1765 + 18180 / 65 L

     = 306 K
     = 306 -273 = 33° C

8 0
3 years ago
What is the charge on the phosphorus atom in the polyatomic ion: PO4-3
oee [108]

+5

Explanation:

  The given radical is                 PO₄³⁻

To solve this problem, we need to understand what oxidation number entails.

The extent of the oxidation of each atom is expressed by the oxidation number.

Here are some rules for assigning them:

  • Elements in an uncombined state or elements that combines with one another, their oxidation number is zero.
  • The charge on an ion is its oxidation number
  • In an neutral compound, algebraic sum of all the oxidation numbers of all atoms is zero.
  • In a radical, the algebraic sum of all the oxidation numbers of the ions is equal to the charge on them.

Oxygen is known to have an oxidation number of -2;

                       

                          PO₄³⁻

 P + 4(-2) = -3

 P -8 = -3

  P = -3 + 8 = +5

The charge on phosphorus is +5

learn more:

Oxidation number brainly.com/question/2086855

#learnwithbrainly

3 0
4 years ago
The characteristic functional groups of a protein are _____.
V125BC [204]

Answer:

\boxed{\text{amide groups}}

Explanation:

A protein is a long chain of amino acids linked together by amide groups.

The general structure is

\rm \left[-NHCHR-\underbrace{\hbox{CO-NH}}_{\hbox{amide group}}-CHRCO-\right]_{n}

4 0
3 years ago
Which physical property is being used to separate the mixtures in each of the following cases?
kirill115 [55]

I think that this is

6 0
3 years ago
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