She is trying to examine internal validity. This type of validity provides evidence to support if there is a direct relation of cause and effect. Scientific studies have internal and external validity. As mentioned, internal validity demonstrates how well a research null hypothesis can be rejected, and the working hypothesis validated. External validity, on the other hand, allows the researcher to transpose his/her findings to the population.
Pros – through the use of social media, a politician is more
accessible to his or her constituents. If someone has a question or a concern,
he or she should be able to directly address the politician. And a politician
will be able to then respond as well. It improves the contact be those who are
governed and the ones who govern. The internet allows for immediate contact in
multiply directions.
Cons – messages can be numerous and/or one person may be
unable to respond to a significant number of his or her constituents. There is
no real accountability for people who use fake accounts and then attack and/or
spam the politicians. As it allows for people to express themselves with
immediacy, some people may frequently react emotionally, instead of
thoughtfully.
Social media allows and encourages genuine discourse and discussion
to occur, but as with everything it depends on the responsibility of the users
to use it effectively and with honest purposes.
Answer:
No, the reaction was not carried out in a closed system
Explanation:
Recall that a closed system is one in which there is no exchange of materials nor energy. Hence there is no movement of matter in or out of the system. The total mass and energy present in the system is constant.
On the reactant side we have that the total mass of baking soda and vinegar is 47g + 13 g = 60g.
However on the product side, we have only a total of 56g which implies that a mass of 4g was lost in the reaction. This loss of mass can not happen in a closed system.
Hence the system is not a closed system because some mass was lost.
The correct answer for this question is this one: market and demand.
If the raw market cost for producing a particular good is lower for one producer than another the former producer has demand for producing the good. Hope this helps you answer your question.
<span>Media networks often compete to be first. Insider information that results in the ability to present an article sooner than their competitors is a great incentive to cover topics of any niche. Accuracy is also key. If the insider information exposes accurate information, the media network is able to prepare their article without spending time checking facts.</span>
