Question

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40 points​

Answer 1

Answer:

1. Equilibrant force
2. Momentum
3. Acceleration
4. Force can move a stationary object
5. Inertia is the inherent property of an object. Three types of inertia are inertia of rest , inertia of motion , inertia of direction.
6. It is due to the inertia of direction.
7. If a body is at rest , then it will remain in the state of rest unless an external force is applied to it. If a body is in motion, it will remain in the state of motion with the same speed and the same direction unless an external force is applied to it.

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Answer 2

Answer:

The operation of wastewater treatment plants results in direct emissions, from the biological processes, of greenhouse gases (GHG) such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), as well as indirect emissions resulting from energy generation. In this study, three possible ways to reduce these emissions are discussed and analyzed:  minimization through the change of operational conditions,  treatment of the gaseous streams, and  prevention by applying new configurations and processes to remove both organic matter and pollutants. In current WWTPs, to modify the operational conditions of existing units reveals itself as possibly the most economical way to decrease N2O and CO2 emissions without deterioration of effluent quality. Nowadays the treatment of the gaseous streams containing the GHG seems to be a not suitable option due to the high capital costs of systems involved to capture and clean them. The change of WWTP configuration by using microalgae or partial nitritation-Anammox processes to remove ammonia from wastewater, instead of conventional nitrification-denitrification processes, can significantly reduce the GHG emissions and the energy consumed. However, the area required in the case of microalgae systems and the current lack of information about stability of partial nitritation-Anammox processes operating in the main stream of the WWTP are factors to be considered.Ghg emissions for nitrogen removal in wastewater treatmentDetermine force exerted on the objects by gravityThe gravitational force between a mass and the Earth is the object's weight. Mass is considered a measure of an object's inertia, and its weight is the force exerted on the object in a gravitational field. On the surface of the Earth, the two forces are related by the acceleration due to gravity: Fg = mg.