Lv 2587 points

thislove07

Questions11
• halogenoalkanes help?

1) which compound is suitable for use in a fire extinguisher?

A HF

B CBrF3

C CH3(CH2)5CBr3

Rank the following processes in giving best yield for synthesis of 2-bromo-4-nitromethylbenzene from benzene.

nitration, bromination, alkylation

*

I need the answers to these questions, and brief explanation of how you derive the answers because I couldn't understand. Thank you so much for your help!

• thermal physics help!?

A canal connects a reservoir to a town. This canal supplies water to the town. Last summer, the town is supplied with water at an average rate of 2.7m^3s^-1. This canal is 51km long and 9.2m wide. In the daytime, the average power from the Sun that is absorbed per unit area by the surface of the water is 900Wm^-2. The temperature of the water does not change.

The density of water is 1000kg^m-3 and the specific latent heat of vaporisation of water is 2.26 x 10^6 Jkg^-1. What is the rate that the water has to be supplied from the reservoir?

• differentiation help?

y = tu

what is dy/dt?

• Prison Break, Lost, TV Mobile?

What is the song in the advertisement on TV mobile for "Prison Break" and "Lost"?

• does anyone know what happened to my com?

everytime i try to scroll down, it scrolls up on its own! and its pretty annoying cause i practically can't do anything with my com!

• Puma El Rey Shoes, Singapore?

Hi, may I know if Puma's El Rey shoes are sold in Singapore? If yes, where can I find them?

Don't tell me to buy online, thanks! (:

And can someone tell me where can I find a large variety of canvas shoes?

Website for reference:

http://store.puma.com/pumaUSStore/product.asp?cata...

• Mathematical Induction?

1 = 1

1 - 4 = - (1 + 2)

1 - 4 + 9 = 1 + 2 + 3

1 - 4 + 9 - 16 = - (1 + 2 + 3 + 4)

1 - 4 + 9 - 16 + 25 = 1 + 2 + 3 + 4 + 5

. .

. .

. .

n

E [(-1)^(r+1)] [r^2] = f (n)

r = 1

where f (n) is a quadratic equation in terms of n.

How do you derive f (n)?

• Easy-to-write poems?

Hi, I'm currently near graduation and am expected to hand in a self-directed project. I've chosen to write a collection of poems, but unfortunately I find that I feel uncomfortable writing poems, esp those with rhythm.

I need your help in recommending some types of poems which are easy to handle, and without the need for rhythm.

An example would be a terza rima.

Oh, and for a modern sonnet, can I omit the rhyme and rhythm ? Just 14 lines with 10 syllables each?

Thanks a lot!

• What is the title of this song and the name of the artist?

Watch this video and see if you know her:

http://202.157.174.100/20060829-theUnXpected-Windo...