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    If you’re secretly worried about your smart phone addiction, then the new NoPhone might be just the thing you need. It looks and feels exactly like a smart phone, but it does nothing. It’s just a piece of plastic that you can carry around in your hand to fool yourself.

    Dutch designer Ingmar Larsen came up with the idea as a joke along with his two friends. To their great surprise, the idea received a lot of attention online and people from all over the world started placing requests for NoPhones of their own. So that’s when the three friends decided to turn to collecting enough fund for mass production.

    NoPhone is currently a prototype (模型) that will cost only $12 once it hits the market It is 5.5 inches high, 2.6 inches wide and 0.29 inches thick, bringing it quite close to the latest smart phones on the market. It is described as “battery free”, “no upgrades necessary,” “shatter-proof (抗震)”, “waterproof” and “an alternative to constant hand-to-phone contact that allows you to stay connected with the real world.”

     “Phone addiction is everywhere,” the designers insist. “It’s ruining your dates. It’s distracting you at concerts. It’s blocking sidewalks. Now, there is a real solution. With a thin, light and completely wireless design, the NoPhone acts as a substitute to any smart mobile device, enabling you to always have a phone to hold without giving up potential engagement with your direct environment.”

    If you’re interested in NoPhone, but concerned about not being able to take selfies (自拍) anymore. Don’t feel upset. The makers do have an upgrade at no extra charge---the mirror sticker. That way, they say, you can enjoy “real-time” selfies with your friends when they’re standing right behind you.

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风寒温度
人们都有这样的体验:走在街上,穿着的衣服感觉冷暖刚好适宜,这时突然起了一阵大风,顿时感觉周身寒冷,这就是风寒效应。风寒效应会影响人们对冷的感觉,导致人体感觉的温度与温度计的示数有明显的差别。原来,人体的主要散热部位是皮肤,通过皮肤红外辐射、接触传导热量、冷热空气对流和汗液蒸发等方式散热。当无风时,在人体皮肤和周围空气之间,有一个比较稳定的空气层,由于空气是热的不良导体,可以起到保温作用;当刮风时,稳定的空气保温层不断被新来的冷空气所代替,并把热量带走。风速越大,人体散失的热量越快、越多,人也就感觉越寒冷。科学家提出用风寒温度描述刮风时人体皮肤感觉的温度。并通过大量实验找出了风寒温度和风速的关系,下表是在气温为5℃时,风寒温度和风速的关系。

风速(km/h)010203040
风寒温度(℃)531-1-3

(1)风会使人感觉更寒冷的原因主要是加强了下列哪种散热方式(____ )
A.辐射    B.传导   C.对流     D.汗液蒸发
(2)一个质量为50kg的人散失热量4.2×105J,如果人体没有产生相应的热量,则体温将下降____ ℃。[人体的比热容取4.2×103J/(kg·℃)]
(3)当气温为5℃,风速为35km/h时,地面的水会结冰吗?
答:____ 。
(4)根据所给数据,用T表示风寒温度,t表示气温,v表示风速,请你写出三者关系的表达式:____ 。