²ʲв
:
³
ʳ
'
˳
˳
ϳ
'
㳿
Գ
Գ
Գ
Գ


Are the high energies produced by the LHC dangerous and what happens if something goes wrong?

The LHC does produce very high energies, but these energy levels are restricted to tiny volumes inside the detectors. Many high energy particles, from collisions, are produced every second, but the detectors are designed to track and stop all particles (except neutrinos) as capturing all the energy from collisions is essential to identifying what particles have been produced. Very little of the energy from collisions is able to escape from the detectors.

The main danger from these energy levels is to the LHC machine itself. The beam of particles has the energy of a Eurostar train travelling at full speed and should something happen to destabilise the particle beam there is a real danger that all of that energy will be deflected into the wall of the beam pipe and the magnets of the LHC, causing a great deal of damage. The LHC has several automatic safety systems in place that monitor all the critical parts of the LHC. Should anything unexpected happen (power or magnet failure for example) the beam is automatically dumped by being squirted into a blind tunnel where its energy is safely dissipated.

This all happens in milliseconds the beam, which is travelling at 11,000 circuits of the LHC per second, will complete less than 3 circuits before the dump is complete.

http://www.lhc.ac.uk/11841.aspx

 

 


²

вͲ

THE PRESENT SIMPLE TENSE

Present Simple , , ( 䳺) to:

study we study you study they study

to -s -es:

to invite he invites, to teach she teaches

-s. -es :

) 䳺 s, ss, ch, tch, x:

to kiss kisses, to flash flashes

) 䳺 ( -es ):

to multiply multiplies, to dry dries

: , -s:

to say says, to obey obeys

) 䳺 :

to go goes, to do does

Present Simpledo does, :

Do I study? Do we study? Does he read? Does she write?

. , 䳺 do does :

Who lives there? Whose father lives there?

Present Simpledo does, notto:

do not study. does not study.

do not does not don't doesn't:

don't see you. He doesn't see me.

ij to be Present Simple :

I am he is she is it is we are you are they are

to beto do:

Are you an engineer? I am not an engineer.

Present Simple :

1) , 䳿 :

goes to see her every day.

2) 䳿, :

speaks both French and English.

3) :

Water is a liquid.

4) 䳿 , :

shall be there till he comes.

5) 䳿 䳺, :

His train arrives tomorrow morning.

Present Simpleto be(Past Participle) 䳺:

is interrogated. am asked about it.

THE PAST SIMPLE TENSE

Past Simple 䳺:

worked we worked you worked

䳺 . Past Simple 䳺 to -ed, :

[t] , t:

to ask asked to, like liked

[d] , d, :

to clean cleaned, to live lived, to answer answered

[id] t, d, te, de:

to want wanted, to defend defended, to hate hated, to decide decided

Past Simple:

) e, Past Simple -ed :

to love loved

) , , -ed :

to study studied, to cry cried

) , , :

to stop stopped to permit permitted

) r , ( ):

to prefer preferred, to occur occurred

) 1 , ( ):

to travel travelled, to fulfil - fulfilled

Past Simple 䳺 -.

Past Simple 䳺 䳺 didto. 䳺 :

Did you go to the Institute yesterday? What did he say?

Past Simpledid, notto. 䳺 :

did not know this. They did not work.

did not didn't:

didn't understand you.

ij to be Past Simple was were:

I was we were
you were you were
he was she was it was they were

to bedid:

Were you at home yesterday? I was not at home

was not, were not wasn't, weren't:

They weren't afraid of him.

Past Simple :

1) 䳿 . 䳿 yesterday, last week, the other day, ago:

I saw you in the street yesterday. They lived in London before the war.

2) :

dressed, went downstairs, had some coffee in the kitchen and went out to the garage.

3) 䳿 :

saw her every day.

Past Simpleto be Past Simple Past Participle 䳺:

was examined you were examined he was examined she was examined it was examined we were examined you were examined they were examined

 

Ͳ

THE FUTURE SIMPLE TENSE

Future Simpleshall willto.shall , will :

shall/will stand you will stand he will stand she will stand it will stand we shall/will stand you will stand they will stand

. 䳺 will Future Simple .

shall will'll, :

Illtell it to you after dinner. .

Hell be back in an hour. ³ .

䳺 :

Shall we come back here? ?

When will he be at home? ?

not:

We shall not go there. .

will not stay here. ³ .

shall not will not shan't won't:

shan't go there. .

She won't go to the theatre. .

Future Simple , 䳿 :

I'll go there with you. .

I'll always come back. .

He'll work at the factory next year. .

Future Simple . 䳿 Present Simple:

I'll be here till youcome. , .

I'll give it to him when he comes back. , no.

to be Future Simple Past Participle 䳺:

(we) shall be examined.

He (she, it, you, they) will be examined.

вͲ

© 2013 wikipage.com.ua - wikipage.com.ua |