All electromagnetic waves moving through a vacuum move at:

Answers

Answer 1

Answer: at the speed of light wich is approx 3 x 108 meters/ second

Answer 2

Answer: all electromagnetic waves move through a vacuum at about 3*108 meters a second hope that this helps some if not sorry

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If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to havea. a period higher than the original period. b. a pitch lower than the original pitch. c. an amplitude lower than the original amplitude. d. a frequency higher than the original frequenc

Sa ma ajute cineva va rog mult Ce cantitate de apă poate fi încălzită de la temperatura t 1 = 10 0 C la temperatura finală T 2 = 293, 15 K, dacă i se furnizează căldura de 41850 J ? Se dă căldura specifică a apei : c apă = 4185

Answers

Răspuns:

1000 kg

Explicaţie:

Date date

t1 = 10 ° C

t2 = 293,15K = până la grad = 293,15-273 = 20,15 ° C

= 20 ° C aproximativ

Q = 418kJ = 418000J

c = 4180J / kg ° C

m =? Kg

Necesar:

Masa m în kg

Pasul doi:

Formulă:

Q = c * m * Δt

Q = c * m * (t2 -t1)

m = Q / c * (t2-t1)

Calculati:

m = 418000/4180 * (20-10)

m = 100 * 10 kg

m = 1000 kg

If you want to increase the acceleration of an object, what must happen to the force being applied?

Answers

You would need a bigger force to act upon the object

The cloud of interstellar dust and gas that forms a star is known as aA. white dwarf.
B. protostar.
C. red giant.
D. nebula.

Answers

D. nebula

Nebula is the cloud of interstellar dust and gas that forms a star. It is collborately shaped during colliding and collapsing of the interstellar mediums this is influenced by the gravitational attraction of the atoms and particles in the entites. Hence, there are three types of nebular namely, are classical nebula, diffuse nebula, planetary nebular and supernova remnants.

A rock containing valuable minerals that can be mined is called A. An inorganic compound
B. An igneous rock
C. An ore
D. An organic compound

Answers

A rock containing valuable minerals that can be mined is called an ore. The correct option is C.

What is an ore?

Ore is a deposit of one or more valuable minerals present inside the Earth's crust.

Metals essential to industry and trade, such as copper, gold, and iron, are found in the most valuable ore deposits. Copper ore is mined for a number of industrialapplications.

Ore is natural rock or sediment that contains one or more valuable minerals, usually metals, and can be mined, treated, and sold for a profit.

Mining extracts ore from the Earth, which is then treated or refined, often through smelting, to extract valuable metals or minerals.

Crushing the rock is the first step in extractingore from it. Heap leaching, flotation, or smelting are methods for extracting ore from rock.

Thus, the correct option is C.

For more details regarding an ore, visit:

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When you look at green dots with a red filter what color did you see?

Answers

-- Looking at the dots casually, they look green because they absorb all other
colors of light, and only green light is left to proceed to your eyes. (In order for
this to work, there has to be some green in the light shining on the dots.
Daylight and most light bulbs work fine.)

-- The filter looks red because it absorbs all other colors of light, and only
the red light is left to pass through the filter and come out on the other side.

-- When the green light from the dots hits the red filter, it's absorbed in the
filter, and there's no light left to come out on the other side.

If you're looking through the filter at the dots, they look black.

Which of the following best defines the science of separating color wavelengths?a. spectroscopy
b. color-detection
c. photo-chemistry
d. spectrophotometry

Answers

Answer: spectroscopy

Spectroscopy is the separation of the light in the different wavelengths and spectrophotometry measures the intensities of the different components of the light to get the composition of substances.

Answer:

Explanation:

I took the test :)

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