Определите функции инфинитива и переведите предложения на русский язык:
1. To dissolve this substance is difficult.
2. To launch rockets a new type of fuel was needed.
3. The purpose of tension test is to determine the mechanical characteristics of a material.
4. The northernmost Russian health-resort is to be founded soon in Siberia, on the banks of the river Lena.
5. When airplanes appeared, Amundsen learned to fly, becoming the first Norwegian civilian flier.
6. The design of a mechanism depends on the work to be done.
7. To use atomic energy for peaceful purposes is the task of our scientists.
8. The substance to be tested must be wet or in a solution.
9. It is very important to determine the degree of radiation during a flight.
10. To determine the density of a body, it is necessary to determine its mass and its volume.