The two ways you can use to make an informal survey are:
- make field observations
- interview people using informal unstructured techniques
<h3>What are informal surveys?</h3>
In informal surveys can be regarded as a type of survey that can be made by the researcher by going to the field themselves and this can be done by using different methods or ways.
For instance, the researcher can go out to interview people that can give the data that is needed about the research such as informally asking them questions, unstructured techniques can also be used to solve critical issues.
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Answer:
I do not know much but I looked and read, this I learned I hope this is good
The Maglev is a system of train transportation that uses two sets of magnets
working repel one another when matching poles face each other. Here, both magnetic attraction and repulsion are used to move the train car along the guideway.
Explanation:
Brainliest please
Answer:
investor claim is acceptable
Explanation:
given data
Win = 0.25 kW
Qc = 3000 J/s = 3kW
Th = 293 K
Tc = 270 K
solution
we get here coefficient of performance of cycle is
coefficient of performance = 
..................1
put here value and we get
coefficient of performance = 
coefficient of performance = 1.2
and
coefficient of performance of ideal refrigeration is
coefficient of performance = 
..................2
coefficient of performance = 
coefficient of performance = 11.74
and
we can see here that coefficient of performance of ideal refrigeration is is more than real cycle coefficient of performance
so investor claim is acceptable
