1.
The cosmonauts use portable TV cameras to send (обстоятельство) space
telecasts to the Earth.
2.
To break (обстоятельство) the
new glass a great amount of force should be applied.
3.
The results to be received (определение) by the researchers may vary
considerably.
4.
The computers have to carry (часть составного глагольного сказуемого) out several thousands of arithmetic operations
per second and be (часть составного глагольного сказуемого) very
reliable.
5.
To strengthen (подлежащее) metals
means to make (дополнение) them
harder.