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Studentka2010 [4]
4 years ago
7

1. A scientific hypothesis can become a theory if ______.

Chemistry
2 answers:
OLga [1]4 years ago
8 0
1) - it can become a theory if the hypothesis is <span>tested extensively and competing hypotheses are eliminated - other options are not enough


2) This is a hypothesis. A theory is basically almost an established truth, which can still be changed with new data, but which as far as we know is true.</span>
Dominik [7]4 years ago
4 0

1) The answer is: B) the hypothesis is tested extensively and competing hypothesis are eliminated.

Theory is a tested, unifying explanation for a set of verified facts.  

Theory is a system of explanations that ties together a lot of facts.

Steps of the scientific method:  

1) ask a question about something that is observed.  

2) do background research.  

3) construct a hypothesis, an attempt to answer questions with an explanation that can be tested.  

4) test of hypothesis.  

5) analyze collected data and draw a conclusion.  

2) The answer is: D) hypothesis.

Hypothesis is a suggested explanation for an observable phenomenon.

Experimenters may test and reject several hypotheses before solving the problem.

A working hypothesis is provisionally accepted as a basis for further research.

A law in science is a generalized rule to explain a body of observations in the form of a verbal or mathematical statement.

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If a hydrogen atom and a helium atom have the same kinetic energy:________
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Answer: If a hydrogen atom and a helium atom have the same kinetic energy then the wavelength of the hydrogen atom will be roughly equal to the wavelength of the helium atom.

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The relation between energy and wavelength is as follows.

E = \frac{hc}{\lambda}\\

This means that energy is inversely proportional to wavelength.

As it is given that energy of a hydrogen atom and a helium atom is same.

Let us assume that E_{hydrogen} = E_{helium} = E'. Hence, relation between their wavelengths will be calculated as follows.

E_{hydrogen} = \frac{hc}{\lambda_{hydrogen}}    ... (1)

E_{helium} = \frac{hc}{\lambda_{helium}}         ... (2)

Equating the equations (1) and (2) as follows.

E_{hydrogen} = E_{helium} = E'\\\frac{hc}{\lambda_{hydrogen}} = \frac{hc}{\lambda_{helium}} = E'\\\lambda_{helium} = \lambda_{hydrogen} = E'

Thus, we can conclude that if a hydrogen atom and a helium atom have the same kinetic energy then the wavelength of the hydrogen atom will be roughly equal to the wavelength of the helium atom.

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