Sep 30
Algebra 1 help?
icon1 admin | icon2 air x wind | icon4 09 30th, 2010| icon32 Comments »

I’m really not getting how to solve bigger r*t=d problems. Here’s an example from my homework.

Flying with the wind, a plane travels 1200 nautical miles in 4 hours. Flying against the wind, it travels 500 nautical miles in 2 hours. What is the speed of the plane in still air and the wind?

Let x=the speed of the plane in still air
Let y=The speed of the wind.

Can you solve and explain how exactly you solved? I have nine more of these to do, and I could really use some help.

Thanks so much!

:)

flying wid the wind effective speed will be x+y. speed is distance travelled divided by time taken. so x+y is 300miles/hr. effective speed flying against the wind is x-y. so x-y will be 250 miles/hr. now solve these 2 equations in x and y to get their values. from 1st equation x=300-y. put this value of x in 2nd equation to get answer.
x=275 miles/hour
y= 25 miles/hour

Sep 27

How many watts will a panel i want to create with 36cells withe the following specifications emit?
Average Power (Watts): 1.8 W
Average Current (Amps): 3.6 Amps
Average Voltage (Volts): 0.5 V
Its making some sense.
So this is true also
0.5V*36Cells*3.6W per cell = 64.8 Watts? (series)

Watts add up. If one cell can produce 1.8 W, then thirty six cells can produce 36×1.8 W.
Volts add up for cells that are wired in series. Amps add up for cells that are wired in parallel. If you put all of the cells in series, then you’ll get 36×0.5 V, at 3.6 A. Etc.

Sep 27

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Sep 27

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Domestic Wind Turbines – Use Homemade Wind Turbines to Power Your Home

Domestic Wind Turbines Use Homemade to Power Your Home

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Sep 27

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Sep 27

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Sep 23

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Sep 23

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Sep 23

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Sep 23

http://www.diy-solar-wind-energy.com/ DIY solar projects are becoming common systems for homes. Generating your own electricity with solar energy can’t be beat. More people install DIY solar systems with construction plans for any size project.

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