Answer/Explanation:
An irrigation system represents a stable food supply because it is how they controlled water to be able to plant crops. A second most important artifact that is in the category of stable food supply is the plow. Agriculture produced enough food that people became free to pursue interests other than worrying about what they were going to eat that day.
The different stages of the water cycle are <span>evaporation, condensation, precipitation and collection. </span>
Answer:
Battle of Stalingrad-1942
Answer: These responses might illustrate the SOCIAL DESIRABILITY EFFECT.
This type of Research is indicative of a self report. In self report researches, there are tendencies for participants to respond inaccurately or falsely to questions.
Social desirability effect is the tendency for an individual to Research questions in a manner or way that will be viewed in a good light by others.
Participants in this question responding a high tolerance for even the most annoying Behaviour is indicative of the Social desirability effect.
Answer:
F = 8.45 * 10^-8 N
Explanation:
The gravitational force is calculated using
F = GMm/r²
Where
G represent gravitational constant = 6.67 * 10^(-11)
M = Mass of the boy = 78kg
m = Mass of the girl = 65kg
r = Distance between them = 2m
Substitute these values in the formula, we have:
F = (6.67 * 10^(-11) * 78 * 65)/2²
F = (6.67 * 78 * 65 * 10^(-11))/4
F = (33816.9 * 10^(-11))/(4)
[Divide by the denominator]
F = 8454.225 *10^(-11)
[Expand]
F = 8.454225 * 10³ * 10^(-11)
F = 8.454225 * 10^(3-11)
F = 8.454225 * 10^-8
[Approximate]
F = 8.45 * 10^-8 N
Hence, the force of attraction between them is 8.45 * 10^-8 N
