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     In E__1__ , people don't talk m__2__ . You can go on a bus or on a train, and everyone sits looking out of the w__3__ . Often they read b__4__ and n__5__ . But they don't often t__6__ . When you meet the English people, they often talk about one t__7__ , the weather. So When you meet someone in England, you may say, "N__8__ weather isn’t it?" "Yes, it is. But it will r__9__ tomorrow," someone may answer. If you talk like this, the English people will think you are f_10__ .

氢气球重10N，空气对其浮力为16N，由于受水平风力的作用，氢气球的绳子和地面成θ=60°，如右图所示，由此可知，绳子的拉力为______N，水平风力是______N．