物理是一门实用性很强的科学,与工农业生产、日常生活有着极为密切的联系.物理已渗入到人类生活的各个领域.今将与物理知识息息相关的生活中的冷暖现象举例如下.1一年四季地球上大多数地方的平均温度在一年当中会有季节的更替.在中国、加拿大、欧洲和北半球的其他地区,天气在1月份通常是寒冷的,而在7月份是温暖的.但是太阳辐射输 Physics is a highly practical science, which is closely related to industrial and agricultural production and daily life.Physics has infiltrated into all fields of human life.Nowadays, the phenomena of warmth and warmth in life that are closely related to the physical knowledge are as follows.1 The average annual temperature of most parts of the globe will change seasonally throughout the year, and in the rest of China, Canada, Europe and the northern hemisphere, the weather is usually colder in January and warmer in July. But solar radiation is lost