A giant helium(氦) balloon is telling residents of Paris how

英语翻译
alice,4,flies a helium balloon from her school in england .after more than six weeks.a 26 year old young man gets it in a park in guangzhou.what a long trip

100分求英文翻译,求手工
A helium balloon is rising vertically above point A that is located on level ground directly
underneath the balloon. As it rises for a time period of 1 minute, its angle of elevation from a
point B on the ground that is located 180 meters from point A changes from 13 degrees to 65
degrees. How far does the balloon rise during this period of time? Approximate your answer to
the nearest tenth of a meter.

知道速度求波长
The average speed of a helium atom at 25°C is 1.23 103 m·s-1.What is the average wavelength of a helium atom at this temperature?

猜词题.应该选什么
However,the amount of helium that could have been produced in this manner can becalculated,and it turns out to be no more than a few percent.
The word "calculated" is closest in meaning to which of following?
(A) ignored
(B) converted
(C) increased
(D) determined

英语翻译
By the water,there is a small pink dot of a helium balloon,bobbing in the intermittent breeze.The balloon is key.It was given to you by Pink Flamingo,a pizza parlor down the nearby Rue Bichat,whose bicycle deliveryman will use it as a beacon to locate you and present the five pies you’ve ordered (10.50 to 16 euros each).They’re not all for you,of course — you’ve got friends to help eat the pizza and drink the four bottles of red wine (40 euros) you picked up from Le Verre Vole,a wine bar across the canal.
And you,you’ll take off on foot,up along the canal toward Belleville,where Asian,Arab and African immigrants live alongside artists and yuppies and bobos.And you’ll climb the stairs at the Hipotel Paris Belleville and collapse into the single bed of your Spartan room,not caring that the toilet is in a smelly closet down the hall,because the sheets are clean,the rate is dirt cheap and you’ve just experienced the most wonderful,traditional and frugal activity in the City of Light — the picnic.

How many helium atoms are there in a helium blimp containing 539kg of helium?
是问539kg的氦气 有多少个氦原子吗?