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goldfiish [28.3K]
3 years ago
7

A hypothesis is tested by ___.

Chemistry
2 answers:
icang [17]3 years ago
5 0

A hypothesis is tested by conducting an experiment.

Finger [1]3 years ago
4 0

Answer: The correct answer would be A. Conducting Observation

Explanation:

Because....

If you don't conduct an experiment then how will you know if your hypothesis was true or not. So a hypothesis is tested by <em>Conducting Observation.</em>

<em>* Hopefully this helps:) Mark me the brainliest:)!!</em>

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B false i think, i may be wrong

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Landfills produce methane, which is a greenhouse gas and contributes to global warming. please select the best answer from the c
Alla [95]

It is true that methane, which is a greenhouse gas and contributes to global warming.

A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range.

Global warming is rise in the average temperature of the Earth's climate system.

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Balanced chemical reaction of combustion of methane:

CH₄ + 2O₂ → CO₂ + 2H₂O

Greenhouse gases are so difficult to measure, because carbone dioxide, methane, chlorofluorocarbons comes from multiple sources, some of which are relatively hard to measure.

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6 0
2 years ago
Planck's constant, h, is 6.626 x 10-34 Js. The speed of light in a vacuum, c, is 3.00 x 108 m/s. Calculate the energy of ultravi
igomit [66]

Given the Planck's constant and the speed of light, the energy of the ultraviolet light with a frequency of 9.58×10¹⁴ Hz is 6.35×10¯¹⁹ J (Option C)

<h3>Data obtained from the question </h3>
  • Planck's constant (h) = 6.626×10¯³⁴ Js
  • Speed of light (v) = 3×10⁸ m/s
  • Frequency (f) = 9.58×10¹⁴ Hz
  • Energy (E) =?

<h3>How to determine the energy </h3>

The energy of the ultraviolet light can be obtained as follow:

E = hf

E = 6.626×10¯³⁴ × 9.58×10¹⁴

E = 6.35×10¯¹⁹ J

Learn more about energy:

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