# Posts by micha

Total # Posts: 15

**chemistry**

Ethane(a minor constituent of natural gas) burns in oxygen to form carbon dioxide and water. How many moles of oxygen are needed to react with one moles of ethane?

**Math**

you're all wrong, you idiots. it's 100 miles. 15 + .11m = 18 + .08m .11m = 3 + .08 .03 = 3 m = 100

**physics**

A railroad car of mass 26500 kg is released from rest in a railway switchyard and rolls to the bottom of a slope Hi =8 m below its original height. At the low point, it collides with and sticks to another car of mass 20000 kg. The two cars roll together up another slope and ...

**physics**

A billiard ball rolling across a table to the right at 2.2 m/s makes a head-on elastic collision with an identical ball. The mass of a billiard ball is 32 g. If the second ball is initially at rest, what is the velocity of the first ball after the collision? If the second ball...

**Math**

BFA and AFE are vertical meaning they are also supplementary (= to 180) so you you would set up an equation like 3r+12+-8r+210=180 then combine like terms you should get -5r+220=180 then subtract 220 from 180 leaving -5r=-42 then divide -5 from-42

**re drwls geography**

thankyou it was very kind for you to help

**geography**

In the river tees is the upper course at the begining where the source is and the lower course where the mouth is? thanks

**Geography**

I am writing a report for Geography about the River Tees . Where the river starts the source is this called the upper course? and where it ends is this called the lower course? thanks for help

**reading**

it is long and yellow

**Algebra**

Thanks! :)

**Algebra**

Okay,If I understand this is what I come up with. square root of 6^2-2^2=x^2 square root of 36-4=x^2 square root of 32=x^2 x=4 square root of 2*2= x=8 square root of 2= approx. 11.3 m

**Algebra**

I am sorry, How would I set this problem up?

**Algebra**

A homeowner wishes to insulate her attic with fiberglass insulation to conserve energy. The insulation comes in 40-cm wide rolls that are cut to fit between the rafters in the attic. If the roof is 6 m from peak to eave and the attic space is 2 m high at the peak, how long ...

**Algebra**

How do I work this correctly? I know the answer is 7 but I am doing something wrong.Here is what I have... x+ã(2x-5)=10 x+ã(2x-5)^2=10^2 x+2x-5=100 3x-5+5=100+5 3x=105 x=35 PLEASE HELP!

**physics**

9.92x10^2