Answer:
35/2 J/s
Explanation:
Just use the 2 formulas
Work done = Force * distance moved
Power = Work done/time
WD = 7 * 50 = 350
Power = 350 / 20
= 35/2 J/s
The x and the y coordinates of the center of the mass of this system will be 43.1 m and 3.12 m respectively.
<h3>What is the center of mass?</h3>
A location is established in relation to an object or set of objects in the center of mass. It is the system's average position across all of its components.
Given data;
There are three little objects that are densely spaced out in the x-y plane.;
The value of the masses
m₁=1.41 kg
m₂=2.55 kg
m₃=3.19 kg


Hence, the x and the y coordinates of the center of the mass of this system will be 4.31 m and 3.12 m respectively.
To learn more about the center of mass, refer;
brainly.com/question/8662931
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From solid to liquid. also known as melting
from solid to gas known as sublimation
Number of fatalities means number of deaths among the miners.
Enforcing the Federal Coal Mine Health and Safety Act would definitely decrease the number of fatalities.
Therefore, the time period when the coal mine enforced the Federal Coal Mine Health and Safety Act to help miner would be the time period with the least number of fatalities.
Observing the given table and based on the above explanation, the best choice would be:
d. between 1975 and 1985