容易做
发表于 2025-3-25 06:32:52
http://reply.papertrans.cn/63/6218/621771/621771_21.png
仲裁者
发表于 2025-3-25 10:42:44
http://reply.papertrans.cn/63/6218/621771/621771_22.png
thrombus
发表于 2025-3-25 14:48:15
Heating Things,t’? Many people have used the word ‘heat’ in this way. The idea that ‘heat’ exists as a real substance goes back to at least the 18th century when it was believed that hot objects contained a fine fluid called ‘caloric’ (heat) and that as objects cooled the ‘caloric’ flowed out of them.
纪念
发表于 2025-3-25 16:32:11
Practical Work,n acquired by testing out ideas practically. Testing out ideas, investigating phenomena in controlled conditions and accurately making measurements are part of the everyday life of scientists. How can you be sure that an idea works unless you test it?
琐事
发表于 2025-3-25 20:33:09
Mathematical Skills,and practical science, words and ideas are not enough. The physics student needs to be able to perform calculations in order to test predictions accurately and to be able to process information gained from laboratory measurements.
Cocker
发表于 2025-3-26 02:39:54
http://reply.papertrans.cn/63/6218/621771/621771_26.png
agonist
发表于 2025-3-26 07:28:31
http://reply.papertrans.cn/63/6218/621771/621771_27.png
Valves
发表于 2025-3-26 12:14:19
http://reply.papertrans.cn/63/6218/621771/621771_28.png
Finasteride
发表于 2025-3-26 15:12:51
http://reply.papertrans.cn/63/6218/621771/621771_29.png
单挑
发表于 2025-3-26 20:51:38
Electrons and Electricity,d out, there is nothing at all very static about sparks. Static effects are caused by the build up of ., electric ‘charged’ particles. Frictional forces may cause an electron to be freed from its atom. The resulting attraction between positively charged atoms, called ., and . will cause them to be f