We regard the Quries as having discovered the phenomenon of radioactivity.
Lodygin was practically without money, having spent all he had on his numerous experiments.
Having established relations of independence in the physical fact, modern physics tries to interpret these relations.
Having been measured with unreliable instruments, the data were incorrect.
All the machines that have ever been built by man have some energy “loss”, that energy being converted into useless heat due friction.
In astronomy even vast bodies as the Earth and the Sun can be treated as material particles, their actual dimensions being negligible compared with their mutual distance.
