Friday

April 18, 2014

April 18, 2014

Total # Posts: 12

**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 c...

**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...

**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 do...

**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

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