[1] （物理學）An object at a distance of 2 inches from a convex lens has its image magnified three times. What is the focal length of the lens?[2] （物理學）What different phenomena would be observed if the following substances be braught …

[1] （物理學）A cubic meter of air is heated under the normal atomospheric pressure until its volume is doubled. How much of the heat supplied to it is converted into external work.[2] （物理學）Explain how the velocity of sound in air var…

[1] （物理學）A short iron bar tube having one end sealed weights 2 kilogrammes and contains air of 3 litres and of ordinary temperature and pressure. The tube is made of to sink into sea water at the same temperature. If the specific grav…

2019.02.25記[1] （物理學）A glass flask is filled with a mixture of ice and water, and a narrow tube with one india rubber stopper is filled into the neck as to force the water up to a certain height in the tube ; the flask is then immerse…

2019.02.22記 [1]（化學）Give an account of the chemistry of nitrogen and its compound.[2]（數學）Find the area bounded by a straight line and the parabola . [3]（英語）Translate the folowing passage into English:-- 工科大學に諸學科の實驗室…