Estimate the weight of 25 km of gas pipeline, DN = 610 mm and wall thickness = 12.7 mm.
1 answer:
Answer:
Weight = 45880 kN
Explanation:
Gas pipeline material is steel.
Density of steel = 7850 kg/m³
Mass = Volume x Density
Volume = Area x Length
Outer diameter = 610 mm
Internal diameter = 610 - 2 x 12.7 = 584.6 mm
Length = 25 km = 25000 m
Volume = 25000 x 0.0238 = 595.78 m³
Mass = 595.78 x 7850 = 4676875.12 kg
Weight = Mass x Acceleration due to gravity = 4676875.12 x 9.81 = 45880 kN
Weight = 45880 kN
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Answer:
The magnitude of the net force is √2F.
Explanation:
Since the two particles have the same charge Q, they exert the same force on the test charge; both attractive or repulsive. So, the angle between the two forces is 90° in any case. Now, as we know the magnitude of these forces and that they form a 90° angle, we can use the Pythagorean Theorem to calculate the magnitude of the resultant net force:
Then, it means that the net force acting on the test charge has a magnitude of √2F.