jonahd -- Blogmeister

The original picture came from here.

Water Pollution is very serious thing. Animals and humans die because of it. Water pollution is when garbage or waste gets into our natural water systems and basically kills living animals and makes humans and animals sick.

Water pollution can come from many sources from big industrial companies to your own sewage system, and you really don't want that in your drinking water. There are 7 types of water pollution, surface water pollution the pollution of oceans rivers or lakes, oxygen depletion that is when microorganisms that live in water feed on biodegradable substances but when theres too much biodegradable items in the water too many spawn using up the available air for fish and the fish technically drown, groundwater pollution, that is where people dig wells and pesticides contaminate the soil getting into the water and sickening anyone who drinks it, nutrients pollution that is when the ground gets to nutrient from waste and starts growing too many weeds killing native plants, microbiological pollution that is when microorganisms cause illnesses, suspended matter, when particles that are too big to dissolve into the water sink and could hurt the fish, and finally chemical pollution that is when industrial and agricultural chemicals run off into the water and pollutes it.

Some of the consequences for water pollution are health issues such as, birth defects, immune suspension, failure to reproduce, acute poisoning, sick animals and sick anything that eats them and even DEATH to humans and animals, it also cost money to clean it up, and it will kill the environment.

But there are ways to clean it, such as industrial treatment, ozone waste water treatment, and denitrification. These are just my favorite ones I encourage you to google them.

There are also ways you can prevent water pollution, such as not using as much water, recycling, not over using fertilizer and pesticides, planting plants, using environmentally friendly house hold objects, and what ever you do DO NOT EVER LITTER. Also be careful what you put down your sinks and storm drains, the garbage you but down it goes into watersheds near you and into places like garbage island (google that too). Thanks for reading this and if you want to learn more you can click on the link -->http://jj49z6.vc.c3.catn.com/

Q1. What happened to the effort force, effort distance, and the amount of work you did to raise the sled .1m when you used a lever? (Explain what happened as you got farther from the fulcrum or pivot point.)

A1. As where I pushed down got away from the foulcrum it got easier to push down.

Q2. What do simple machines do to make our lives easier and how do they do it?

A2. Simple machines make life easier becoase we can do more N-M of work with less effort.

Q3. Explain what happened when you used a lever to get your motor to lift the heavy sled.

A3.When I Used the motor and the lever to lift the load it could lift more than withought the lever.

1. A Watt is the amount of energy a battery or motor etc. can generate. You can calculate the power by Dividing the Work by the number of seconds it took to do the work.

2. If a lightbulb has 100w then it does 100nm of work per second.

3. 750 watts = 1hp

4. yes Because when its in seres the watts of the batter adds up making it have more watts.

5. As I added more batteries the motor could lift more.

6. My time graph and my power graph were different becuase the time graph measured the amount time it took for the motor to lift the washers but the power graph measured the amout of power 1 battery generated.

7.If I needed to lift a bigger load i could add more batteries.

8.Yes 4.25 Volts lifted the load.

Work is doing something that at the end when youre done doing it you are tired or when you go and do a job.

The scientific definition is of work is how many newtons an object wieghs multiplied by the length in meters you moved the object, so you can study all night and not do any work.

I found that one battery generated 1 newton of force. My hypothesis was as the number of batteries increased the force the motor could pull increased. I was right. This happened because one battery had 1.2volts but as more batteries were connected the volts increased. Data:
1 battery= 1 newton
2 batteries= 2 newtons
3 batteries= 3 newtons

1. I learned that controlled variables are very important, if you change multiple variables you don't know what variable did what.

2. The spring scale can measure friction because with the block on the hook, well, the block touches the ground and as you pull it, it has drag pulling on the spring scale telling you the friction force.

3. If you put the block on ice it would have less friction than the other surface types. If you but more blocks on the other block it would have more friction than just 1. And if you changed the surface area It would change by a little bit.

Conclusion:

I conclude that weight of the block makes the biggest difference in friction force. I thought that the surface types would make a bigger difference. As the surface types got rougher the friction force increased, and as the blocks increased in weight the friction force increased, but as surface area increased the friction force DECREASED.

1. Attach The cart to the rubber band, and attach the other side of the rubber band to something else.

2. A thicker rubber band

3.Gravitational

4.Down

5. Some are more dence than others

6. Force is something that acts on another thing

7. When I added more washers the weight of the washers increased. I said that when the number of washers increase the weight of the washer increased, I was right. One washer weighed 0.25 newtons, All of the washers together weighed 1.25 newtons. I think this happened because each individual washer has its own weight therefor when each washer is added to the hook the weight increases for every washer that's added.