2 years ago

How do astronomers observe and learn about celestial objects?

1 answer:

8 0

Answer:

Astronomers use a number of telescopes sensitive to different parts of the electromagnetic spectrum to study objects in space. Even though all light is fundamentally the same thing, the way that astronomers observe light depends on the portion of the spectrum they wish to study.

Explanation:

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What is the wavelength of a wave with a<br>velocity of 50 m/s and a frequency of 5 Hz?

pentagon [3]

Answer:

Wavelength is 10m

Explanation:

To solve this problem, we use the formula for wavelength

Wavelength = wave velocity / frequency

Wavelength = 50m/s / 5Hz

= 10m

8 0

3 years ago

Elements are organized into groups / families according to their physical and chemical properties. Identify the elements that's

Kryger [21]

Answer:

1 valence - Alkali Metals: Li Lithium, Na Sodium, K Potassium

2 valence - Alkaline Earth Metals: Be Beryllium, Mg Magnesium, Ca Calcium

3 valence - Non-metals: B Boron, Al Aluminium

4 valence - Non-metals: C Carbon, Si Silicon

5 valence - Non-metals: N Nitrogen, P Phosphorus

6 valence - Non-metals: O Oxygen, S Sulfur, Se Selenium

7 valence - Halogens: F Fluorine, Cl Chlorine, Br Bromine

8 valence - Noble Gases: He Helium, Ne Neon, Ar Argon

3 0

3 years ago

Why does a beta particle have an atomic number of -1

Fudgin [204]

I cant entirely tell for now but an article on rodioactivity should solve the problem

6 0

2 years ago

In a chemical process, three bottles of a standard fluid are emptied into a larger container. A study of the individual bottles

Setler79 [48]

Answer:

The expected value is = 39 units

The standard deviation is = 0.1212 unites

The probability is = 0.2047 units

Explanation:

The explanation of this answer is shown on the first uploaded image

5 0

3 years ago

The Law of Conservation of Matter describes how mass is not lost during a chemical reaction.

weeeeeb [17]

False, it states that matter can be nether created nor destroyed

7 0

2 years ago

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