"To be" and its functions. "To have" and its functions

IV. Translate the following sentences with ellipsis:

1. 
   Although a theoretical possibility, the nuclear rocket motor is not likely to be used within the next few years.
   
2. 
   Electrical disturbances, no matter how weak, produce radio waves which are picked up by the antenna of the receiver.
   
3. 
   The total wing area will be determined by the gross weight of the airplane, the airfoil used, the type of high lift device, if any, and the required landing speed.
   
4. 
   Galileo proved that objects fall at the same speed whatever their weight.
   
5. 
   Though a quarter of million miles away, the Moon is our nearest neighbor in space.
   
6. 
   When visible, sunspots are the most interesting objects on the solar surface.
   
7. 
   The light of the Sun is very intense, it is about 900 million times that received from Venus, when at her brightest.
   
8. 
   No matter how complex the machine, it is always made up of standard simple machines.
   
9. 
   Electric charge, although not directly observable, makes itself evident by such means as the mechanical force between charged bodies, or the heating, magnetic or chemical effects associated with its motion as an electric current.
   
10. 
    The first observations of stellar ultra-violet radiation have already been made, and although preliminary have yielded some surprising results.
    

17. “It”, “that” / “those”, “one” / “ones”, “both…and”; “either…or”; “neither…nor”, “since”, “as” “for”.
Translate the following sentences. Pay attention to the meanings of “it”, ”that”.
1. It is easy to transform A. C. power from one voltage to another by means of the transformers.
2. There are some areas in which it is difficult to differentiate between analog and digital methods.
3. When an insulator is connected to a voltage source, it stores electric charge and a potential is produced on the insulator.
4. The inductance of a conductor shows how well it can provide induced voltage.
5. It is in industrial technology and scientific development that electronic tools made a great contribution.
6. An electron is very small and it has a very small mass, many times smaller than the atom it came from.
7. It was then that the idea of developing a translating machine was born.
8. The flow of current interested scientists for a long time; at first they thought it to be a liquid.
9. It is the sun that is an unlimited source of energy.