Model Boat Propeller

Posted on | June 7, 2010 | 4 Comments

Model Boat Propeller

can you help me answer this?

Sprinting near the end of a race, a runner with a mass of 65 kg accelerates from a speed of 6 m/s to a speed of 7 m/s in 2 s.

(a) What is the runner's average acceleration during this time?
m/s2

(b) To gain speed the runner produces a backward force on the ground, so that the ground pushes the runner forward providing the force necessary for acceleration. Calculate this average force.
N

The air exerts a forward force of 10 N on the propeller of a 0.40 kg model airplane. If the plane accelerates forward at 4.0 m/s2, what is the magnitude of the resistive force exerted by the air on the airplane?
N

A boat moves through the water with two forces acting on it. One is a 1500 N forward push by the motor, and the other is an 1100 N resistive force due to the water.

(a) What is the acceleration of the 900 kg boat?
m/s 2

(b) If it starts from rest, how far will it move in 6.0 s?
m

(c) What will its velocity be at the end of this time?
m/s

1. delta V / delta t or change in velocity divided by change in time. 1meter per second divided by 2 seconds = .5m/seconds squared
2) F=ma or Force (in newtons) = mass (in kg) times the acceleration (im m/s2) or .5*65 pr 32.5N
3 force 1 +force 2 or 10N + .4*4.0 or 11.6 N
4A) 1500N-1100N = 400N forward F=ma or in this case a=m/F or 900kg/400N = 2.25 meters per second squared.
B)a=V/t and V=S/t therefore a=s/t2 therefore S=at2 or 2.25*36 or 81 meters
c)2.25*6 or 13.5m/s

Propeller Cavitation

New World Order Developed From a New Energy Model

Can you believe that the current centralized power generation model has led us in the wrong path?

The centralized power generation model is comprised of the utility company that provide us with the electrical power for our homes, offices, and industry. It provide us with the energy that is needed to power up the amenities we currently enjoy and power tools to get the job done. In general, electrical capability has provided us the iterative and cumulative knowledge to reach for the stars, literally, and in terms of personal development, knowledge and industrial might. However, the current power generation model has come with a price.

ABOUT THE CENTRALIZED POWER GENERATION MODEL

The centralized power generation model uses a multitude of energy sources, such as Fossil fuels (Coal, LNG, Oil), nuclear energy, and other sources which are less encroaching for the planet, such as: hydro power, wind, solar-thermal, tidal and possibly a few more sources. However, 97% of the world electrical power comes from fossil fuels and nuclear. The centralized power generation model requires of large investments, not smaller than 500 million and not larger than 5 billion dollars per plant depending on its capacity, and it will use 3% of the land for laying the high tension cables that transport the electrical fluid. Because the major energy sources are fossil fuels, we need to get them from wherever the Oil, Coal and Natural Gas comes from, and need to protect is extraction, production, refinement and deployment to reach our power plants in the US.

The US has developed sufficient military power and strength that uses readily to protect our foreign energy supplies, it has created the International Energy Agency (IEA) to legitimize the outreach protection of the Oil stockpiles, and it has shaped our foreign diplomatic policy to protect and ensure that we have the energy needed for the well being of our citizens. Furthermore, the US has created the right environment to develop very large, prestigious, and profitable institutions that explore, extract, produce, refine and distribute oil, like Exxon Mobile, Chevron, and Texaco to name a few. It is these companies that have influence Washington, which have prevented the United States from entering treaties which could curtail and endanger their operations. Foes for the energy sources and the centralized power generation systems sources are both, foreign and domestic folks. These foes have forced power players to spend, invest and distract millions of dollars to advertise, convince, lobby, influence everyone that their power generation model and energy source is good for the US citizens, the planet and the foreign nations and nationals that receive our US investments and payments.

We give credit to the centralized power generation model, that has advance those states that are using it extensively. All top 10 world economies, have very well developed electrical grids and capacities. The next 30 economies have a good to limited electrical capacity, and the remaining economies with more than 2 billion people do not have the energy needed for their survival and to develop their nation. Poverty in these nations generate: hunger, diseases, exploitation, ignorance, genocide, and slavery. Desperation is a propellant for drugs and terrorism. China and India with insufficient electrical capabilities, are now making large strides to catch up to developed nations by investing heavily into power plants that will supply its citizens with the power they require to produce more goods and services, improve their standard of living, generate Green house gases, accelerate depletion of fossil fuels, generate radioactive waste, and everything the US does, for the sake of progress.

DISADVANTAGES OF THE CENTRALIZED POWER GENERATION MODEL

Side effects for the US energy model using non-renewable and nuclear energy, combined with the centralized power generation model, is underdevelopment of nations, the depletion of non-renewable resources, the production of green house gases, the contamination of the planet when using radioactive materials, the proliferation of military power to protect fuel sources and supplies, higher living cost for the common citizen to pay its electric bill, and higher product cost due to the energy used to create and transport the product.

Also, we must give the opportunity to those poor countries friendly to the United States to establish large central power plants like the US and follow our lead. The US can sell the knowhow to create the plants and give them loans through the world bank, IMF, BID, and the like, although this increases their indebtedness and dependency on us.

The players of the central power generation model using non-renewable and nuclear energy sources, have further skewed energy development towards the "Clean Coal" fallacy, Non-Gas emitting energy such as is nuclear, and abundant and inexpensive natural gas, including ethanol as a renewable energy, but still generates green house gases. This model has been very successful in transferring large portion of resources from citizens and consumers, to the Utility and Energy companies, who make billions of dollars in profits. Like in 2008, when the gas prices sky rocketed to 150 dollars a barrel and the US entered into its worst economic crises it has ever had, Exxon-Mobile made a frugal 42 billion dollars in net profits.

PROPOSED SOLUTION

Decentralize the Power generation capabilities by making the "Home Power Generator" appliance (HPG) readily available. Under this distribution model each home, office, light weight industry would use an HPG equipment to generate its own electrical power, sufficient for their needs. Technology for the HPG equipment is simple, available, but still needs to be integrated and targeted to cost less than 10,000 USD for a 3 Kwh, with a two day electrical backup supply, and a 200 lbs gas heater for cloudy or stormy whether.

This strategy decreases investment cost, eliminates the multi million or billion dollar investments in power plants, and further eliminate the need to expand, and maintain an electrical grid.

This strategy allows anyone in the planet, foreign countries, farmers, producers, etc. to power up their homes and business, use power tools and create the products and services they need to improve their lives, reduce poverty, improve health, and reduce their slave like conditions at the citizen and national level.

This strategy would allow people to live in the country or wherever they wish, allowing folks that may not need to live in congested and contaminated cities, to move out and hopefully better distribute people throughout the land.

This strategy would allow the containment of the established centralized capacity, and send the utility companies the message of the need to continue with renewable and clean if they wish to exist in the long term

This strategy would avoid the electrical grid disasters the US has in winter storms, allowing each home to generate is own electricity and heat from its gas and electrical reserves to maintain warmth and power.

Use Solar heat as the primary energy source with a natural gas heater as back up, and a battery bank power storage to operate the HPG appliance. Sun heat is used to move a Stirling engine, which turns the power generator and obtain 2.5 to 3.0 Kwh of direct current. The Battery bank stores a 48 hour electrical supply. Sun heat can be supplemented by a gas heater, to enhance its duration and stabilize its capacity. Gas storage could be as large as people chose.

This clean and natural  energy source would allow common citizens to generate their own power free of charge once the equipment is installed. It will also reduce the fuel cost for making products. With this we stop transferring funds to Utility companies, who make life more expensive and distort technology trends towards their advantage.

This energy source and strategy gives all nations the possibility of development without hurting the planet, stops depleting fossil fuels, and prevents green house gases and nuclear energy contamination. It also reduces the need for the US to aid nations that are producing sufficient for their own needs.

This energy source and strategy hopefully also would stop the building of bio-fuel plants, which also generates green house gases when fuel is burnt.

Use Electrical Power for Transportation Vehicles to stop using fossil fuels altogether. Electrical Power technology for automobile is available, it is a work in progress and still many need to be supplemented with new "Automotive Wind Turbines" to replenish power consumption while vehicle is in motion. Please see The Perfect Automobile in http://www.associatedcontent.com/article/1407214/the_perfect_automobile.html?cat=27

The use of electrical automobiles will: eliminate gas emissions and the cost of fuel. It eliminates the need to import foreign oil, reduces our living cost, and electrical power will eventually penetrate the cargo, truck, ships, and boats, etc.; to reduce fuel cost portion in the price of product. The expansion of HPG and electrical transportation will eventually replace the apparently indispensable "internal combustion motor"

IMPACT

People, government and institutions should not be afraid for this new world order. We currently have endured a very harsh world economic order. Current system has hurt people, created poverty, injustice and inequalities. Only a minority are well off with this system and still manage to influence and induce large numbers to stand fast and defend the status quo. The vast majority of the people in the US are struggling, in debt always, and many American born citizens are disillusion with the American way of life. The planet is in peril, we are depleting non-renewable resources, and threatening the extinguishing of life forms with excessive exploitation.

These apparently small changes, with a micro power generation approach, bottom to top, to establish the HPG and the electrical vehicle are the natural progression for our civilization. They may be offensive and aggressive for power players, but in reality it is these power players that are standing in the way of planet survival, and our betterment. These power players could turn winners if they were to pave the way and take part in developing and implementing the proposed improvements.

In any case, the proposed change could take maybe 10 years. If you observe the time the US replaces its vehicle population it takes 10 years. If you see that most people in an electrical grid are currently comfortable, then HPG appliances may not come to these markets for quite some time. HPG will enter first in into those markets and countries where the electrical capacities and grids are limited and insufficient.

Hopefully the new government administration in the USA will do the right thing for the people of the US, for the people of the world and for out planet.

About the Author

Consultor de Negocios que radica en Miami, Florida y que busca promover el cambio a sistemas y modelos, orgánicos y energéticos, pero siempre sustentables. Asiste a las empresas para coordinar, diseñar, producir, distribuir, mercadear sistemas, modelos o componentes que contribuyan al cambio social y económico. Sirve de enlace a empresas que buscan afiliaciones tecnológicas que generen productos y servicos, que beneficien a la sociedad y al planeta.

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