Answer:
Explanation:
As we know that the moment of area of polar is also known as the second moment of area. It is used to describe resistance to torsional deformation, on cylindrical objects with an invariant cross section area.
Therefore, mathematically second moment of area can be written as,
Here, R is the radius of circular cross section.
Given that a circular section is welded to a wall has a diameter,
Therefore,
Therefore, second moment of area for the circular weld pattern is,
<h2>
Answer: joules</h2>
Explanation:
From the first law of thermodynamics,
Δ=Δ+
Where is the heat given to the gas,
is the internal energy of the gas,
is the workdone by the gas.
When pressure is constant,
When pressure is constant,Δ
Where is pressure and is the volume of the gas.
Given
Δ
So,
Given that Δ
So,Δ
Power =Force * Velocity
Velocity = Distance/Time = 2/0.5 = 4 m/s
Therefore,
P = 1000*4 = 4000 W = 4 kW
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Answer:
D. all atoms with an atomic number over 83
Student 2 is correct. The Benz is not traveling at constant velocity. At the end of two seconds the speed would have increased by 4.4 m/s.
<h3>Final velocity of the Benz</h3>
The final velocity of the benz is determined by using first kinematic equation;
v = u + at
where;
- u is the initial velocity
- a is the final velocity = (2.2 m/s) / 1s = 2.2 m/s²
- t is the time
v = 2.2 + (2.2 x 2)
v = 6.6 m/s
<h3>Change in velocity</h3>
Δv = 6.6 m/s - 2.2 m/s = 4.4 m/s
Thus, student 2 is correct. The Benz is not traveling at constant velocity. At the end of two seconds the speed would have increased by 4.4 m/s.
Learn more about velocity here: brainly.com/question/6504879
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