Donald asks…
Advantages and disadvantages of windturbines?
what are some advantages and disadvantages of using windturbines as an energy source? Example: They ruin the landscape and they are renewable energy resources
The Expert answers:
Advantages:
*One of the best advantages is that after the initial cost, the running cost of the wind turbine for the production of power is almost nil as compared with other power generating stations.
*It is one of the cleanest energy resources.
*Consumes far less space than nuclear, hydro & thermal power plants.
Disadvantages:
*The amount of power produced is far more less than conventional ones, though, through cascading, one easily can power a small town.
*One will have to depend upon the nature for the resources .
*It is not suitable for all places. I.e., one has to search for hill stations and the places of wind gust.
*Its riskier for installation, repair & maintenance as it involves high altitude.
Donna asks…
Physcial science please help ?
Physical Science:
1. What is the difference between a chemical & physical change?
2. List 5 things that are evidence that chemical change has occurred?
3. List an example of mechanical energy turning into heat energy.
4. What is the difference between a chemical and physical change?
5. Define the following: renewable resource; nonrenewable resource.
6. List the 8 types of energy.
7. List 6 types of renewable energy resources.
8. List 5 types of nonrenewable energy resources.
9. List 10 ways to conserve energy in your own home.
10. Give an example of chemical energy being turned into radiant and heat energy.
11. What is an ecological concern with using plastics?
12. Where does all energy on the earth come from?
13. What is the meaning of the term “Fossil Fuel”?
The Expert answers:
12. All energy from earth comes from the sun!!!!!!!!
Daniel asks…
Answer these 22 (Or as many as you want) Simple science questions.Ill put u as best answer?
1. What does a microphone convert sound energy into?
2. What kind of energy is stored in a battery? What kind of energy is found in food?
3. WHat does a wind turbine convert Kinetic energy into?
4. What are the units of energy?
5. WHat are the units of temperature? What temp. is absolute zero?
6. Heat energy can only be transformed if their is a difference is what?
7. WHat is conduction? Give an example of a conductor.
8.WHat is convection? Describe an experiment that shows convection currents.
9.WHat is radiation?
10.What is the difference between heat and temperature?
11.What are fossil Fuels? How does the suns energy get stored in fossil Fuels?
12.How does the suns energy
a)Create Wind?
b)get stored in food?
13.Describe in detail how electricity is generated and supplies your home.
14.Name 3 Fuels That are burnt in power stations to generate Electricity.
15.WHy is petrol definitely not burnt in power stations?
16.WHat are Non-Renewable Resources? What are renewable resources?
17.Why will renewable energy resources never run out?
18.WHat are the best 2 ways of reducing the amount of fossil fuels we burn?
19.Give 2 examples of the use of solar cells. Describe how waves generate electricity.
20.what is the principle of conservation of energy?
21.When is energy Most usefull?WHy are energy transfers not perfect?
22.WHat form of energy does wasted energy usually appear as?
PLEASE AND THANK YOU!!!!
The Expert answers:
You are demanding, I’ll answer those I can off-hand.
1) Sound —> electrical
2) Chemical potential. Chemical potential.
3) electrical
4) kw/h
5) Degree celsius & kelvin. -273 degree celcius
6) Dont understand qn
7) Method of heat transfer by neighbouring vibrating particles. Heat conductor most metals, eg steel.
8) Method of heat transfer by movement of fluids. Place KMnO4 solid into flask, boil can see the movement of currents.
9) Method of heat transfer which does not require any medium.
10) Temperature is a measure of how hot or cold a substance is. Heat – not v.sure
11) Remains of dead animals and plants left behind millions of years ago. Our Sun’s energy doesnt get stored in fossil fuels.
12) Movement of convection currents
Plants need sunlight to photosynthesize
13) Very long question
14) Coal, oil and gas.
15) Too expensive
16) Non-renewable resoures cannot be renewed. Renewable resources can be renewed.
17) Because they are renewable.
18) Alternative forms of energy, eg clean energy. Recycling.
19) Solar cells are converted to electrical energy in factories, homes and power stations. Solar cars. Hydro-electric energy.
20) Energy cannot be created or destroyed. It can only change from 1 form to another.
21) When we need energy? Friction, impedance, mechanical resistance, etc.
22) Heat energy.
Ken asks…
Science Course Work !?
FOSSIL FUELS:
how are fossil fuels extracted?
how does this effect the environment?
give some examples of fossil fuels.
how does their use effect the environment? (think greenhouse gases, global warming, acid rain)
RENEWABLE RESOURCES:
name 3 types of renewable energy resources ?
how can they replace fossil fuels ?
do they have any negative effects on the environment themselves ?
EARTHQUAKES AND VOLCANOES:
how do they effect the environment?
EXTENSION FOR DISTINCTION:
compare and evaluate the effects of natural disaster and human use of fossil fuels on the environment
just answer at what u really know , and 10 points for the best, thank u ^_^
mmm ya i know
The Expert answers:
Ha, the others are right, you are lazy. I might as well, little mind work out won’t hurt…
FOSSIL FUELS:
1. Fossil fuels are mostly drilled for, and mined, then processed in various ways. The coal is mined, and oil drilled, (this is mostly at sea, eg- oil rigs) [ http://www.grantowngrammar.highland.sch.uk/subjects/Peak%20Oil%20web%20site/images/mine%20methods.gif ]
2. This can affect the environment massively, due to…
A) Clearing of forests in oil rich areas.
B) Drilling into the earth (scarring the land)
c) Sea pollution from oil rigs.
3. Crude oil, coal (carbon).
RENEWABLE SOURCES
1. Wood, Hydrogen, Geothermal, Wind power.
2. These sources of power are now in the minority to the larger more popular use of the dwindling supplies of fossil fuels, but as technology advances the more efficient the harnessing of these will become. (Better wind turbines, more etc.)
3. However, these CAN have an effect on the environment, and the landscape also. Wind turbines are often ugly and spoiling of landscapes, and can be extremely noisy and a bad affect on wildlife, for example.
EARTHQUAKES AND VOLCANOES:
1. Earthquakes and volcanoes are extremely powerful forces of nature, and I could write forever about them. They generally occur and fault lines in the earth’s crusts, meaning they occur close to one annother also, (triggering each other, etc.) For example, Mt. St. Helen’s in Washington State, erupted in 1980 with extraordinary consequences. The studying scientists knew of activity, but as they watched from cameras situated near the volcano, they were shocked. The volcano erupted with the force of 500 Hiroshima bombs, and ( this is the bit you need to know, sorry if I went on a bit) 1/3 of the volcano was blown away, and the volcano erupted. The debris flew into the sky and was not seen, apart from the amazing red sunrises and sunsets during the following weeks. The massive crater laft is still there today. Trees that were 10 MILES away were blown to the ground, and they were not saplings, but massive, thick trees of many years. The Tsunami of 2003 was another reminder of the amazing power of earthquakes, with a record breaking 9.2 on the richter scale, set of the Tsunami that killed so many people.
EXTENSION FOR DISTINCTION:
Natural disaster is amazingly powerful, and can kill on average 375 people per day. People and the environment are increasingly suffering from the effects of natural disasters. There are a number of reasons for this such as high population growth and density, migration and unplanned urbanization, environmental degradation and possibly global climate change. Also, city’s are often around the earth’s fault lines due to…
A) Plentiful water
b) Nutritional soil
c) Good temperatures
d) Good scenery
And so on. The fossil fuels is becoming a large hype nowadays, due to scare tactics used by the press the government. When they are gone, I think the world will concentrate on the natural sources more eagerly, and will resolve the problem.
Good luck xD
Lots of love The Geography Geek 8-B
Paul asks…
Geography Review!!!!!!!!!!!!! 10 points?
Can you please help me answer theses questions
Approximately how many people immigrate to Canada each year?
Does Canada have natural decrease or increase?
Why is it important for the government to know about the balance of different age groups in Canada’s population?
What happened to Canada’s population a) after WWI b) during the Depression c) after WWII?
Why are Canadian families today generally small in size?
Why were Canadian families much larger in the past?
What has helped Canada’s death rate to decrease?
Roughly what % of Canadians lives in cities?
Why has this % changed?
Why do people immigrate to Canada today?
Briefly describe the process they undergo.
What kind of immigrants is Canada looking for?
Which area currently supplies the most immigrants to Canada?
Why do people emigrate from Canada?
To which areas do they emigrate?
Why do new immigrants mostly settle in large cities?
What are a) low order b) middle order c) high order goods and services?
How is urban development having an impact on the fringes of the city?
Which sector of Canada’s economy employs the highest %?
What are the major factors affecting where an industry will locate?
Why are Canada’s energy resources so important?
What problems face Canada’s resource industries today?
Why are environmentalists protesting about the Athabasca tar sands extraction?
Why do relatively few Canadians work in agriculture?
What are renewable resources? Give examples.
Explain sustainability.
28. In which parts of Canada are most secondary industries located?
29.Why has there been a decline in rail transportation in Canada?
Why is it important to know (and show) the source of your data?
When writing an exam what are 3 important things to remember in terms of how you tackle the exam?
Canada’s largest immigration was just before WWI. What attracted people to settle here?
What is a refugee?
What are push and pull factors?
Currently, which category is larger, family or independent (economic) immigrants?
Which are the important factors for being accepted as an immigrantWhat is multiculturalism?
What is a) a baby bust b) a baby boom?
Why might each create problems for Canada?
Most Canadians work in primary industries. True or false?
What is the difference between coniferous and deciduous trees?
What is geocaching?
How can Google Earth be used by geographers?
How do satellite photos help meteorologists?
What are Canada’s major waste disposal problems?
What can be done to reduce these problems?
How are environmentalists trying to protect Canada’s resources?
Identify the ways water is returned to the atmosphere.
Where is the Greenwich or Prime Meridian?
How are lines of longitude numbered?
Lines of latitude run parallel. True or false?
Which is the longest line of latitude?
Where would you find a) the Tropic of Cancer b) the Tropic of Capricorn c) the Arctic Circle d) the Antarctic Circle?
What would you find at 90 N?
What happens at the International Date Line?
Why does it not exactly follow 180?
The Expert answers:
Where is the Greenwich or Prime Meridian?
London, England
How are lines of longitude numbered?
0 to 180 both east and west.
Lines of latitude run parallel. True or false?
True
Which is the longest line of latitude?
The equator
Where would you find a) the Tropic of Cancer 23.5 degrees north
b) the Tropic of Capricorn 23.5 degrees south
c) the Arctic Circle 66.5 degrees north
d) the Antarctic Circle? 66.5 degrees south
What would you find at 90 N?
North Pole
What happens at the International Date Line?
A 24 hour change.
Why does it not exactly follow 180?
Because it would separate parts of countries.
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