<em>The correct answer is</em> "All can be measured".
There are seven SI basic units (the kilogram, the second, the kelvin, the ampere, the mole, the candela, the meter).
So from the given options length can be measured by meter (m^3), for density kilogram per cubic meter(kg/m^3), and for temperature is kelvins(K).
True, because they would use a chart to identify what mineral it is. The texture, the way it looks, etc.
The controversy that surrounded the Great Zimbabwe Ruins until the early 1900s was to establish that African society did not build Great Zimbabwe and it is done by some other migrant society.
There were lots of political pressure put to deny the African people's role in the Great Zimbabwe ruins.
Explanation
Great Zimbabwe was an ancient city that was spread around 1,779 acres containing huge stone walls of height 11 m.
They were built around 11th to 15th century.
Building such a huge city with stones by African people were unbelievable to archaeologists and other historians.
Some believed that an alien civilization had built it while some referred it to as a biblical site where Solomon had kept 'Ophir' gold.
Answer:
D. There is no restriction on the entry of new firms into the industry.
Explanation:
The statement about perfect competition that is correct is<em> there is no restriction on the entry of new firms into the industry</em>. Perfect competition describes a theoretical structure of the market in which competition reaches its highest level. Option A is incorrect because there is no limit to the number of firms. Moreover, each firm produces the same product.
I believe there is something wrong with the experiments.
First of all, there is no control group which make the researcher able to distinguish which variables are the one that would change the nature of independent variable. The second reason is because there is biased or non representative sample in the study ( only from colleagues in the same field)
