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Burka [1]
3 years ago
15

Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydr

ogen atoms. Carbon and hydrogen chemically combine to form methane (CH4)
Based on this information,


A.
carbon, hydrogen, and methane are all compounds.
B.
methane is an element and carbon and hydrogen are compounds.
C.
carbon and hydrogen are elements and methane is a compound.
D.
carbon, hydrogen, and methane are all elements
Physics
2 answers:
xeze [42]3 years ago
6 0

the answer to this question is c


eimsori [14]3 years ago
5 0
C is the correct answer.

all substances found on the periodic table are elements by definition. anything that is created using elements, such as methane, carbon dioxide, or water, are all compounds.
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Your answer would be 75 meters
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The height of a circular tower is 179 meters and its diameter is 48 meters. (Assume that the building is a perfect cylinder). Wh
EastWind [94]

The definition of a scale of 1: 166 will mean that the scale of 1 in the model will be equivalent to 166 times the measurement in the real model, therefore we will have that the height would be 166 times smaller than the 179m given:

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The same for the diameter,

\phi = \frac{48m}{166}= 0.2891m = 28.91cm

The volume of a cylinder is given as

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6 0
3 years ago
Sound wave A delivers 2 J of energy in 2 s. Sound wave B delivers 10 J of energy in 5 s. Sound wave C delivers 2 mJ of energy in
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8 0
3 years ago
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Murrr4er [49]

Answer:

Radio waves

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Electromagnetic waves are classified into 7 different types, depending on their frequencies. From lowest to highest frequencies, we have:

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Infrared

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Ultraviolet

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3 years ago
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