i-beams are the choice for structural skyscrapers because of their high functionality.
the shape of i-beams makes them excellent for unidirectional bending parallel to the web.
the horizontal flanges resist the bending movement, while the web resists the shear stress.
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The theory about global warming will be most strongly affected by scientific studies that reveal how the earth’s temperature has fluctuated in the past. The answer is letter C. According to NASA, carbon dioxide levels have increase to nearly 38 percent as of 2009 due to the burning of fossil fuels, cutting down carbon-absorbing forests.
Answer:
Option D. The average speed is 2.5 meters/second, and the average velocity is 0 meters/second.
Explanation:
we know that
To find out the average speed divide the total distance by the total time
Let
d -----> the total distance in meters
t -----> the time in seconds
s ----> the speed in meters per second
Remember that
we have
substitute
<u><em>Find out the average velocity</em></u>
To find out the average velocity divide the displacement) by the time
The displacement is the distance from the start point to the end point regardless of the route
In this problem
The start point is A and the end point is A
so
The displacement is equal to zero
therefore
The average velocity is 0 m/sec
Answer: The work done is 245000 J.
Explanation:
The formula for the force due to the weight of the object is as follows;
Here, m is the mass of the object and g is the acceleration due to gravity.
Put m=500 kg and g=9.8 meter per second.
The formula for the work done is as follows;
Here, F is the force and s is the displacement.
Put F=4900 N and s=50.0 m.
Therefore, the work done is 245000 J.