Question
4
Which of the following is a true statement? Several days after a snowstorm, the roof on Jones house uniformly covered with snow, for whereas on Smith's house next door the snow has completely melted off. A likely reason this is that Smith's house has better roof insulation than does Jones'. When the metal cooling coils in a freezer become coated with ice this helps the freezer more effectively remove heat from warm foods placed in the freezer. When you get out of a swimming pool and stand dripping wet in a breeze you feel colder g than you would if your skin were dry. This is a purely psychological effect, since measurement of your skin temperature would yield the same value in both cases, wet or dry. Thermos bottles have a between the inner and outer layers of glass in order to reduce vacuum heat transfer due to radiation since radiation cannot travel through a vacuum. In some regions the following sign is frequently seen as one approaches a bridge "CAUTION: BRIDGE MAY BE KY". One reason you might expect a bridge to be icier than the road heading up to it is that the bridge has both its top and bottom exposed to cold air, only the top surface of the road is in contact with cold air.
Explanation / Answer
E is true. Bridge is getting cooled from both sides while road gets some warmth from the surface beneath.
